a1-cbiss Gastec Tubes

Gastec Standard Detector Tubes

Gastec detector tubes are used worldwide in factories, refineries, chemical plants, dry cleaners and other work

places where employee protection and gas detection are of paramount importance. From acetaldehyde to xylene,

the gastec precision pump and detector tubes can detect and accurately measure over 500 gases and vapours.

Why Gastec?

The most accurate detector tube system available

Minimal pump strokes required

Precision piston pump

Easy draw, single pup stroke action

Clear, precise and easy-to-read colour change

Long tube shelf-life

Low measurement cost

Complies with British standard BSEN1231:1997

ISO Registered

NATO Approved

99% tubes stock

Next day delivery for orders placed before 3pm (subject to availability)

Batch number traceability

Fast Access to technical solutions and advice

The gastec tube system comprises of the following:

Gastec colorimetric glass filled with an absorbent material, usually silica gel impregnated with a chemical

reagent

Air is drawn through the tube using the Gastec precision pump (GV-100S) and reacts in the presence of the

target gas to produce a colour change

The length of colour stain produced is proportional to the concentration of target gas present. By using a

calibration scale printed on the tube, the concentration may be read immediately, without the need for

laboratory analysis

Gastec standard detector tube specifications:

Hermetically sealed

Long shelf life – 70% of tubes have a 3 year shelf life

Calibration scales printed directly on to the tubes for each production lot, thus eliminating variations in tube

diameter and reagent specifications

Contains small particles of sampling media for clearer determination of colour change and gas concentration

Designed so the specificity of the detector tube depends upon the gas being measured and the chemical

reagent. Some reagents are specific to only one gas but others respond to a group of similar or related gases.

Available to buy online by clicking here

Gastec tubes contain two types of filling reagent:

1) Detecting Reagents: which are located behind the calibration scale. They are special chemicals absorbed onto a

media such as silica gel or silica sand. They produce a distinct layer of colour change by reacting with the target

substance

2) Pre-treatment Reagents: which are located in front of the detecting agents to make the samples more

sensitive to the detecting reagents.

Gastec detector tubes can be classified into 3 types (please see below) according to the filling reagent:

1) Single Reagent: Filled with a detecting reagent

2) Single Reagent: Filled with a pre-treatment reagent and detecting reagent

3) Twin Tubes: Consist of a pre-treatment tube filled with a pre-treatment reagent and a separate detector tube

filled with a detecting reagent. These are joined together with a rubber connector.

Reading Gastec Tubes

1) During sampling, a colour change will occur within the tube in the presence of the target gas

2) Once the sampling time has elapsed, remove the tube from the pump and immediately mark the colour change

demarcation on the tube with a pen

3) From this endpoint, read the concentration of the gas detected from the printed scale on the tube

4) Make a note of the concentration and the date, time and place of measurement.

Hints for detector tube reading

A) When the colour change is FLAT. Read the value at the end of the layer. This reading would be 5

B) When the end of the colour change is SLANTED. Read the value in the middle of the slant. This reading would

be 5

http://stores.ebay.co.uk/a1envirosciences

C) When the end of the colour change is PALE. Read the value in the middle between the dark layer and the pale

end. This reading would be 5

Mesh Correction Factor + Twin Tubes

* Refridgerator Store ++ Nine Tubes All Tubes £29.95/€44.33 Per Pack

Always prefix tube number by the letters "GAS" when placing an order

Gas or Vapour to be Measured/ Gastec Tube Number

Gastec Tube Name Measuring

Range (ppm)

Colour Change Shelf Life

(Year) Chemical Formula Original Stain

A

Acetaldehyde CH₃CHO 92 Acetaldehyde 5-750 Yellow Red 2*

92M Acetaldehyde 2.5-100 Yellow Red 2*

92L Acetaldehyde 1-20 Yellow Brown 2*

Acetic Acid CH₃CO₂H 81 Acetic Acid 1-100 Pink Yellow 3

81L Acetic Acid 0.125-25 Pink Pale Yellow 2*

Acetic Anhydride (CH₃CO)₂O 81 Acetic Acid 0.6-15 Pink Yellow 3


Acetone CH₃COCH₃

151 Acetone 0.05-2% Orange Dark Green 3

151L Acetone 50-12000 Yellow Red 2*

Acetone Cyanohydrin (CH₃)₂C(OH)(CN)

12L Hydrogen cyanide 2.88-69 Yellow Red 2

Acetylene HC=CH 171 Acetylene 0.05-4% White Brown 3

103 Hydrocarbons (Lower

Class)++ 0.075-3.6% Yellowish Brown Greenish Brown 2

172 Ethylene 32.5-1040 Pale Yellow Blue 3

Acetylene Dichloride See 1,2-Dichloroethylene

Acid Gases 80 Acid Gases 1-80 Pale Bluish Purple Yellow 2

Acrolein CH₂:CHCHO 93 Acrolein 3.3-800 Yellow Red 2*

Acrylic Acid CH₂:CHCO₂H 81 Acetic Acid 2-50 Pink Yellow 3


Acrylonitrile CH₂:CHCN 191 Acrylonitrile+ 2-360 Yellow Red 3

191L Acrylonitrile+ 0.1-18 Yellow Pink 3

102L n-Hexane 0.06-1.44% Orange Dark Green 3

Aliphatic Hydrocarbons 140 Aliphatic

Hydrocarbons 6-3000 Yellow Dark Brown 2

Allyl Amine CH₂:CHCO₂H 180 Amines 8.5-170 Pink Yellow 3

180L Amines 0.4-8 Pink Yellow or Pale

Orange 2

Allyl Chloride CH₂:CHCH₂Cl 101L Gasoline (Petrol) 0.1-3.4% Orange Dark Green 3

131L Vinyl Chloride+ 3.2-48 Yellow Reddish Brown 2*

Allyl Isothiocyanate CH2:CHCH₂NCS 149 Methyl Methacrylate 5-200 Yellow Pale Blue 2

Amines R ∙NH₂ Calibration 180 Amines 5-100 Pink Yellow or Pale

Orange 3

Amines CH₃NH₂ Calibration 180L Amines 0.5-10 Pink Yellow or Pale

Orange 2

2-Aminethanol See Ethanolamine


* Refrigerator Store ++ Nine Tubes All Tubes £29.95/€44.33 Per Pack


Gas or Vapour to be Measured/ Gastec Tube Number Gastec Tube Name

Measuring Range (ppm)

Colour Change

Shelf Life (Year)

Chemical Formula

Original Stain

Ammonia NH₃ 3H Ammonia 0.2-32% Purple Yellow 3

3HM Ammonia 0.05-3.52% Pink Yellow 3

3M Ammonia 10-1000 Purple Yellow 3

3LA Ammonia 2.5-200 Purple Yellow 3

3L Ammonia 0.5-78 Pink Yellow 3

180 Amines 1.5-30 Pink Yellow 3

Amyl Acetate CH₃CO₂(CH₂)₄CH₃ 147 Amyl Acetate 10-200 Yellow Pale Blue 2

Aniline C₆H₅NH₂ 181 Aniline 1.25-60 Pale Yellow Pale Green 3

Arsine A₅H₃ 19LA Arsine 0.04-10 Yellow Red 2

Aromatic Hydrocarbons 120 Aromatic

Hydrocarbons

0.4-200 White Brown 3

B

Benzaldehyde C₆H₅CHO 91L Formaldehyde 4-92 Yellow Reddish Brown 3*

Benzene C₆H₆ 121 Benzene 2.5-120 White Dark Green 3

121L Benzene+ 0.1-65 White Dark Green 3

121S Benzene+ 2-312 White Dark Green 3

121SL Benzene+ 1-100 White Dark Green 3






Colour Change

Shelf Life (Year)

Chemical Formula

Original Stain

tert-Butyl alcohol (CH₃)₃COH

102L Hexane 0.05-1.2% Orange Dark Green 3

Butyl Acrylate CH₂:CHCO₂C₄H₉

142L Butyl Acetate 7-210 Yellow Dark Brown 2

Butylamine CH₃(CH₂)₃NH₂

180 Amines 8-160 Pink Greyish Red to

Brown 3


Orange 2

tert-Butylamine (CH₃)₃CNH₂ 180 Amines 5.5-110 Pink Pale Brown 3

n-Butyl Bromide C₄H₉Br 136H Methyl Bromide+ 24-360 White Yellow 3

136L Methyl Bromide+ 10-100 White Yellow 2

136LA Methyl Bromide+ 1-43.2 White Yellow 2

Butyl Mercaptan CH₃(CH₂)₃SH 70L Mercaptans 0.16-12.8 Yellow Red 2

121SP Benzene+ 0.2-20 White Brown 2

171 Acetylene 0.03-0.6% White Brown 3

Benzyl Bromide C₆H₅CH₂Br 136L Methyl Bromide+ 10-100 White Yellow 2

Benzyl Chloride C₆H₅CH₂Cl 132L Trichloroethylene 1.6-20 Yellow Purple 2*

Boron Trichloride BCl₃ 12L Hydrogen Cyanide 0.5-20 Yellow Red 2

Bromine Br₂ 8LA Chlorine 0.05-0.8 White Pale Pink 3

Bromochloromethane See Chlorobromomethane

Bromoform CHBr₃ 136L Methyl Bromide+ 1-50 White Yellow 2

1,3-Butadiene CH₂:CHCH:CH₂ 174 1,3-Butadiene 50-800 Pale Yellow White 3

174L 1,3-Butadiene 2.5-100 Pale Yellow White 3

174LL 1,3-Butadiene 0.5-5 Pink Pale Yellow 3*

Butane CH₃(CH₂)₂CH₃ 104 Butane 25-1400 Orange Dark Green 3

103 Hydrocarbons (Lower

Class)++ 0.035-1.68% Yellowish Brown Greenish Brown 2

1-Butanol CH₃CH₂CH₂CH₂OH 114 1-Butanol 10-150 Yellow Pale Blue 3

2-Butanol CH₃CH₂CH(OH)CH₃ 115 2-Butanol 5-150 Yellow Pale Blue 3

2-Butanone See Methyl Ethyl Ketone (MEK)

Butyl Acetate CH₃CO₂(CH₂)₃CH₃ 142 Butyl Acetate 0.05-0.8% Orange Dark Green 3

142L Butyl Acetate 10-300 Yellow Dark Brown 2

tert-Butyl Mercaptan (CH₃)₃CSH

75 tert-Butyl Mercaptan 2.5-150mg/m³ Yellow Red 2

75L tert-Butyl Mercaptan 0.5-30mg/m³ Yellow Pink 2*

77 TBM and DMS 1-15mg/m³ Yellow Pink 2*

70L Mercaptans 0.1-8 Yellow Red 2

Butyric acid CH₃CH₂CH₂CO₂H 81L Acetic Acid 0.325-13 Pink Pale Yellow 2*

Butyronitrile CH₃CH₂CH₂CN 191L Acrylonitrile 6-180 Yellow Pink 3

C

Carbon Dioxide CO₂ 2HH Carbon Dioxide 2.5-40% Orange Yellow 3

2H Carbon Dioxide 0.5-20% White Purple 3

2L Carbon Dioxide 0.13-6% White Purple 3

2LL Carbon Dioxide 300-5000 Pale Blue Purple 3

2LC Carbon Dioxide 100-4000 Pale Red Yellow 2

Carbon Disulphide CS₂ 13M Carbon Disulphide 20-4000 Purple Yellow 3

13 Carbon Disulphide 0.63-100 Blue Yellow 3

Carbon Monoxide CO 1HH Carbon Monoxide 1-50% White Blackish Brown 3

1H Carbon Monoxide 0.1-10% White Blackish Brown 3

1M Carbon Monoxide 0.05-4% White Pale Brown 3

1LM Carbon Monoxide 25-2000 White Pale Brown 3

1L Carbon Monoxide 2.5-2000 Yellow Blackish Brown 3

1LA Carbon Monoxide 8-1000 Yellow Blackish Brown 3

1LC Carbon Monoxide 1-30 White Pale Pink 2

1LK Carbon Monoxide (In Hydrogen) 5-600 White Pale Brown 3

1LL Carbon Monoxide 5-50 Yellow Blackish Brown 3






Colour Change

Shelf Life (Year)

Chemical Formula

Original Stain

Carbon Tetrachloride CCl₄ 134 Carbon Tetrachloride+ 0.5-60 White Yellow 1*

134L Carbon Tetrachloride+ 0.25-12 White Yellow 1*

Carbonyl Chloride See Phosgene

Carbonyl Sulphide COS 21 Carbonyl Sulphide+ 5-200 Blue Yellow 2*

21LA Carbonyl Sulphide+ 2-125 Bluish Purple White 2*

Chlorine Cl₂ 8HH Chlorine 0.25-10% Reddish Purple Yellow 3

8H Chlorine 25-1000 White Vermilion 3

8LA Chlorine 0.1-16 White Pale Pink 3

8LL Chlorine 0.025-2 White Pale Green 1*

80 Acid Gases 0.7-14 Pale Bluish Purple White 2

Chlorine Dioxide ClO₂ 23M Chlorine Dioxide 0.1-10 White Pale Pink 3

23L Chlorine Dioxide 0.025-1.2 White Pale Green 1*

8H Chlorine 25-250 White Vermilion 3

8LA Chlorine 0.3-4.8 White Pale Pink 3

Chlorobenzene C₆H₅Cl 126 Chlorobenzene 2-500 White Grey 3

126L Chlorobenzene 0.5-43 Yellow Pale Purple 2*

Chlorobromomethane CH₂BrCl

135 1,1,1-Trichloroethane+ (Methyl Chloroform) 22-110 White Reddish Orange 3

136H Methyl Bromide 18-270 White Yellow 3

136L Methyl Bromide 11-110 White Yellow 2

136LA Methyl Bromide 0.7-12.6 White Yellow 2

Chlorocyclohexane C₆H₁₁Cl 102L Hexane 50-1200 Orange Dark Green 3

1-Chloro-2, 3-epoxy propane See Epichlorohydrin

2-Chloroethanol See Ethylene Chlorohydrin

Chloroethylene See Vinyl Chloride

Chloroform CHCl₃ 137 Chloroform+ 4-400 White Orange 3

137LA Chloroform+ 0.5-30 White Pale Purple 1*

137LL Chloroform+ 0.3-4.5 White Pale Purple 1*

Chloropicrin Cl₃NO₂ 134 Carbon Tetrachloride+ 2.5-60 White Yellow 1*

m-Cresol C₆H₄(CH₃)OH 61 o-Cresol 1-25 Pale Yellow Grey 2*

o-Cresol C₆H₄(CH₃)OH 61 o-Cresol 0.4-62.5 Pale Yellow Grey 2*

p-Cresol C₆H₄(CH₃)OH 61 o-Cresol 1-25 Pale Yellow Grey 2*

Cumene C₆H₅CH(CH₃)₂ 122L Toluene 2-100 White Brown 3

Cyclohexane C₆H₁₂ 102H Hexane 0.015-1.2% Orange Dark Green 3

102L Hexane 60-1440 Orange Dark Green 3

Cyclohexanol C₆H₁₁OH 118 Cyclohexanol 5-100 Yellow Pale Blue 2

Cyclohexanone C₆H₁₀O 154 Cyclohexanone 2-75 Pale Yellow Yellow 2*




Gas or Vapour to be Measured/

Gastec Tube Number Gastec Tube Name


Colour Change

Shelf Life (Year)

Chemical Formula

Original Stain

Cyclohexanone C₆H₁₀O 91L Formaldehyde 10-470 Yellow Reddish Brown 3*

Cyclohexene C₆H₁₀ 151 Acetone 0.05-0.8% Orange Brownish Green 3



Cyclohexylamine C₆H₁₃N 180 Amines 7-140 Pink Salmon Pink 3


Orange 2

Cymene C₁₀H₁₄ 141L Ethyl Acetate 5.6-224 Yellow Blackish Brown 2

D

n-Decane CH₃(CH₂)₈CH₃ 105 Hydrocarbons (Higher Class) 200-6000 White Blackish Brown 3

Diacetone Alcohol (CH₃)₂C(OH)CH₂COCH₃ 154 Cyclohexanone 2.5-100 Pale Yellow Yellow 2*

Diacetyl CH₃COCOCH₃ 92 Acetaldehyde 25-1500 Yellow Red 2*

1,2-Diaminoethane See Ethylenediamine

Diborane B₂H₆ 22 Diborane 0.02-5 Yellow Red 2

1, 1-Dibromoethane CH₃CHBr₂ 136L Methyl Bromide+ 7-70 White Yellow 2

1,2-Dibromoethane See Ethylene Dibromide

Dibromomethane CH₂Br₂ 136L Methyl Bromide+ 5-50 White Yellow 2

Di-n-butylamine (CH₃CH₂CH₂CH₂)₂NH 180 Amines 5-100 Pink Pale Orange 3


Orange 2

m-Dichlorobenzene C₆H₄Cl₂ 127 o-Dichlorobenzene 2.5-300 White Light Brown 3

o-Dichlorobenzene C₆H₄Cl₂ 127 o-Dichlorobenzene 2.5-300 White Light Brown 3

p-Dichlorobenzene C₆H₄Cl₂ 127 o-Dichlorobenzene 2.5-300 White Light Brown 3

1,1-Dichloroethane CH₃CHCl₂ 135 1, 1, 1-Trichloroethane+ 90-450 White Reddish Orange 3

1,2-Dichloroethane See Ethylene Dichloride

1, 1-Dichloroethylene See Vinylidene Chloride

1,2-Dichloroethylene ClCH:CHCl 139 1,2-Dichloroethylene 5-250 Yellow Reddish Purple 2*

132HA Trichloroethylene 80-800 Yellow Reddish Purple 2*

132LL Trichloroethylene 0.4-6 Yellow Purple 2*

Dichloromethane See Methylene Chloride

1,2-Dichloropropane See Propylene Dichloride

1,3-Dichloropropene ClCH₂CH:CHCl 132HA Trichloroethylene 45-450 Yellow Reddish Purple 2*

131LA Vinyl Chloride 0.5-10 Yellow Reddish Brown 2*

Diethylamine (C₂H₅)₂NH 180 Amines 5.5-110 Pink Pale Brown 3


Orange 2

Diethylaminoethanol (C₂H₅)NCH₂CH₂OH 180L Amines 0.6-12 Pink

Yellow or Pale Orange 2

Diethyl Benzene C₆H₄(C₂H₅)₂ 122L Toluene 2-150 White Brown 3





Colour Change

Shelf Life

(Year)

Chemical Formula

Original Stain

Diethylenetriamine H₂NCH₂CH₂NHCH₂CH₂NH₂ 180L Amines 0.95-19 Pink Greyish Purple 2

Diethylethanolamine (C₂H₅)₂NC₂H₄OH 180 Amines 6-120 Pink Pale Brown 3

Diethyl Ether See Ethyl Ether

Diisobutylene (CH₃)₃CCH:C(CH₃)₂ 121 Benzene 45-540 White Dark Green 3

Diisobutyl Ketone [(CH₃)₂CHCH₂]₂CO 102L Hexane 0.2-1% Orange Dark Green 3

91L Formaldehyde 0.58-29 Yellow Reddish Brown 3*

Diisopropylamine [(CH₃)₂CH]₂NH 180 Amines 5-100 Pink Pale Orange 3

180L Amines 0.3-6 Pink Yellow or Pale Orange 2

Diisopropyl Benzene C₆H₅N[CH(CH₃)₂]₂ 141L Ethyl Acetate 10-400 Yellow Blackish Brown 2

N,N-Dimethyl Acetamide CH₃CON(CH₃)₂ 184 N, N-Dimethyl Acetamide 1.5-240 Pink Pale Yellow 3

Dimethylamine (CH₃)₂NH 3H Ammonia 1.2-19.2% Purple Yellow 3

180 Amines 5.5-110 Pink Salmon Pink 3


2-Dimethylaminoethanol (CH₃)₂NCH₂CH₂OH 180L Amines 0.65-13 Pink Yellow or Pale Orange 2

Dimethylaminopropylamine (CH₃)₂NCH₂CH₂CH₂CH₂NH₂ 180 Amines 0.6-12 Pink Yellow or Pale Orange 2

180L Amines 8-160 Pink Greyish Red 3

N,N-Dimethylaniline C₆H₃(CH₃)₂(NH₂) 181 Aniline 2.5-30 Pale Yellow Pale Green 3

Dimethylbenzene See Xylene

Dimethylethanolamine (CH₃)₂NCH₂CH₂OH 180 Amines 6.5-130 Pink Pale Orange to Yellow 3

180L Amines 0.65-13 Pink Pale Orange 2

N,N-Dimethylethylamine C₂H₅N(CH₃)₂ 180 Amines 4-80 Pink Yellow 3


N,N-Dimethyl Formamide HCON(CH₃)₂ 183 N,N-Dimethyl Formamide 0.8-90 Pink Pale Red 3

2,6-Dimethyl-4-heptanone See Diisobutyl Ketone

Dimethylhydrazine NH₂N(CH₃)₂ 185 Hydrazine 0.1-2 Pink Yellow 3

Dimethyl Sulphide (CH₃)₂S 77 TBM and DMS 1-15mg/m³ Pink Pale Yellow 2*

1,4-Dioxane C₄H₈O₂ 159 Tetrahydrofuran 25-140 Pink Pale Blue 3

163 Ethylene Oxide 0.1-6% Orange Green 3







Colour Change

Shelf Life

(Year)

Chemical Formula

Original Stain

Dipropylamine (CH₃CH₂CH₂)₂NH 180 Amines 4-80 Pink Yellow 3


Divinyl Benzene C₆H₄(CH:CH₂)₂ 124L Styrene 1-15 White Yellow 3

Divinyl Methoxysilane (CH₂:CH₂)₂CH₃OSi 113L Isopropyl Alcohol 2.5-40 Pink Pale Blue 3

E

Epichlorohydrin CH₂OCHCH₂Cl 163L Ethylene Oxide+ 1.2-120 Yellow Reddish Brown 1*

1,2-Epoxypropane See Proylene Oxide

Ethanethiol See Ethyl Mercaptan

Ethanol C₂H₅OH 112 Ethanol 0.01-7.5% Pink Pale Blue 3

112L Ethanol 50-2000 Pink Pale Blue 3

Ethyl Alcohol See Ethanol

Ethanolamine H₂NCH₂CH₂OH 180 Amines 7-140 Pink Yellow 3

180L Amines 1.95-39 Pink Greyish Purple 2

Ethyl Acetate CH₃CO₂C₂H₅ 141 Ethyl Acetate 0.1-1.5% Orange Dark Green 3

141L Ethyl Acetate 25-800 Yellow Blackish Brown 2

Ethyl Acrylate CH₂:CHCO₂C₂H₅ 141L Ethyl Acetate 8-320 Yellow Blackish Brown 2

Ethylamine C₂H₅NH₂ 180 Amines 5-100 Pink Yellow 3


Ethyl Benzene C₆H₅C₂H₅ 122 Toluene 11-330 White Brown 3

122L Toluene 1-70 White Brown 3

p-Ethyl Benzylchloride C₆H₄(C₂H₅)CH₂Cl 131LA Vinyl Chloride+ 2.5-50 Yellow Reddish Brown 2*

Ethyl Bromide C₂H₅Br 136L Methyl Bromide+ 2.5-200 White Yellow 2

Ethyl Chloride C₂H₅Cl 138 Methylene Chloride+ 15-150 White Pale Pink 3

Ethyl Chloroformate ClCO₂C₂H₅ 131LA Vinyl Chloride+ 7-140 Yellow Reddish Brown 2*

Ethylene CH₂:CH₂ 172 Ethylene 25-1680 Pale Yellow Blue 3

172L Ethylene 0.2-100 Pale Yellow Blue 3

103 Hydrocarbons (Lower Class)++ 0.35-16.8% Yellowish Brown Greenish Brown 2

171 Acetylene 0.1-2% White Brown 3

Ethylene Chlorohydrin ClCH₂CH₂OH 111L Methanol 20-200 Pink Pale Blue 3

Ethylenediamine H₂NCH₂CH₂NH₂

180 Amines 14-280 Pink Yellow 3


Ethylene Dibromide BrCH₂CH₂Br

136H Methyl Bromide+ 14-210 White Yellow 3

136L Methyl Bromide+ 8-80 White Yellow 2







Colour Change

Shelf Life

(Year)

Chemical Formula

Original Stain

Ethylene Dichloride ClCH₂CH₂Cl 135 1,1-Trichloroethane+ 400-2000 White Reddish Orange 3

135L 1,1-Trichloroethane+ 104-1040 White Pale Pink 2

Ethylene Glycol HOCH₂CH₂OH 165L Ethylene Glycol+ 10-100mg/m³ Yellow Reddish Brown 3*

Ethylene Glycol Monobutyl Ether CH₃(CH₂)₃OCH₂CH₂OH

113L Isopropyl Alcohol 30-1000 Pink Pale Blue 3

113LL Isopropyl Alcohol 23-230 Pink Pale Blue 2

Ethylene Glycol Monoethyl Ether C₂H₅OCH₂CH₂OH

113L Isopropyl Alcohol 62.5-1000 Pink Pale Blue 3

113LL Isopropyl Alcohol 15.2-152 Pink Pale Blue 2

Ethylene Glycol Monoethyl Ether Acetate CH₃CO₂CH₂CH₂OC₂H₅


Ethylene Glycol Monomethyl Ether CH₃OCH₂CH₂OH



Ethylene Glycol Monomethyl Ether Acetate

See 2-Methoxyethyl Acetate

Ethylene Oxide C₂H₄O 163 Ethylene Oxide 0.05-3% Orange Green 3

163L Ethylene Oxide 0.4-350 Yellow Reddish Brown 1*

163LL Ethylene Oxide 0.1-10 Yellow Pale Orange 1*

Ethyl Bromide BrCH₂CH₃ 136L Methyl Bromide+ 2.5-200 White Yellow 2

Ethyl Ether (C₂H₅)₂O 161 Ethyl Ether 0.04-1% Orange Dark Green 3

161L Ethyl Ether 10-1200 Yellow Pale Blue 2

Ethylidene Chloride See 1,1-Dichloroethane

Ethyl Mercaptan C₂H₅SH 72 Ethyl Mercaptan 0.5-120 White Yellow 3

72L Ethyl Mercaptan 0.2-75 Yellow Red 2

70 Mercaptans 0.5-120 White Yellow 3


71H Methyl Mercaptan 100-3800 White Yellow 3

N-Ethyl Morpholine C₆H₁₃NO 180 Amines 5-100 Pink Yellow 3


F

Fluorine F₂ 17 Hydrogen Fluoride 0.5-50 Yellow Brown 3

Formaldehyde HCHO 91 Formaldehyde 2-100 White Brown 3

91M Formaldehyde 8-6400 Yellow Red 2*

91L Formaldehyde 0.1-40 Yellow Reddish Brown 3*

91LL Formaldehyde 0.05-1 Yellowish Brown Reddish Brown 1*

Formic Acid HCO₂H

81 Acetic Acid 5.2-130 Pink Yellow 3

81L Acetic Acid 0.5-20 Pink Yellow 2*

Furfural C₅H₄O₂ 154 Cyclohexanone 2-30 Pale Yellow Yellow 2*







Colour Change

Shelf Life (Year)

Chemical Formula

Original Stain

G

Gasoline (Petrol) CnHm 101 Gasoline (Petrol) 0.015-1.2% Orange Dark Green 3

101L Gasoline (Petrol) 30-2000 Orange Dark Green 3

1M Carbon Monoxide 0.1-2% White Pale Brown 3

H

Heptane CH₃(CH₂)₅CH₃ 101 Gasoline (Petrol) 0.015-1.2% Orange Dark Green 3

101L Gasoline (Petrol) 30-2000 Orange Dark Green 3


105 Hydrocarbons (Higher Class) 90-2700 White Blackish Brown 3

Hexamethylenediamine H₂N(CH₂)₆NH₂ 180L Amines 1.55-31 Pink Greyish Purple 2

Hexane CH₃(CH₂)₄CH₃ 102H n-Hexane 0.015-1.2% Orange Dark Green 3

102L n-Hexane 4-1200 Orange Dark Green 3



Hexone See Methyl Isobutyl Ketone

2-Hexyl Alcohol CH₃(CH₂)₃CH(OH)CH₃ 141L Ethyl Acetate 60-2400 Yellow Blackish Brown 2

Hexylamine CH₃(CH₂)₅NH₂ 180 Amines 9-180 Pink Pale Orange 3


Hydrazine N₂H₄ 185 Hydrazine 0.05-2 Pink Yellow 3

Hydrocarbons (Higher Class) 105 Hydrocarbons (Higher Class) 100-3000 White Blackish Brown 3

Hydrocarbons (Lower Class) 103 Hydrocarbons (Lower Class)++ 0.05-2.4% Yellowish Brown Greenish Brown 2

Hydrogen H₂ 30 Hydrogen 0.5-2% Yellow Yellowish Brown 3

Hydrogen Bromide HBr 15L Nitric Acid 0.8-16 Yellow Reddish Purple 3

Hydrogen Chloride HCl 14R Hydrogen Chloride 50-5000 Purple Yellow/Pale Pink 3

14M Hydrogen Chloride 10-1000 Yellow Red 3

14L Hydrogen Chloride 0.2-76 Yellow Pink 3

80 Acid Gases 8-160 Pale Bluish Purple Pale Reddish Purple 2

8HH Chlorine 1.5-30% Reddish Purple Yellow 3







Colour Change

Shelf Life (Year)

Chemical Formula

Original Stain

Hydrogen Cyanide HCN 12H Hydrogen Cyanide 0.05-1.6% Yellow White 3

12M Hydrogen Cyanide 17-2400 Yellow Red 3

12L Hydrogen Cyanide 0.36-120 Yellow Red 2

12LL Hydrogen Cyanide 0.2-7 Yellow Pink 2

Hydrogen Fluoride HF

17 Hydrogen Fluoride 0.25-100 Yellow Brownish

Pink/Deep Pink 3

17L Hydrogen Fluoride 0.09-72 Yellow Brown 2

Hydrogen Peroxide H₂O₂ 32 Hydrogen Peroxide 0.5-10 White Yellow 3

Hydrogen Sulphide H₂S 4HT Hydrogen Sulphide 1-40% Pale Blue Blackish Brown 3

4HP Hydrogen Sulphide 0.25-20% Pale Blue Blackish Brown 3

4HH Hydrogen Sulphide 0.1-4% Pale Blue Blackish Brown 3

4H Hydrogen Sulphide 10-4000 White Brown 3

4HM Hydrogen Sulphide 25-1600 White Brown 3

4M Hydrogen Sulphide 12.5-500 White Brown 3

4L Hydrogen Sulphide 1-240 White Brown 3

4LL Hydrogen Sulphide 0.25-120 White Brown 3

4LB Hydrogen Sulphide 0.5-12 Pale Yellow Pink 2

4LT Hydrogen Sulphide 0.1-4 Pale Yellow Reddish Brown 2*

4LK Hydrogen Sulphide 1-40 White Brown 3

45S Hydrogen Sulphide+ H2S:1.25-120 White Brown 3

Hydrogen Sulphide + Sulphur Dioxide (Total Quantification) H₂S+SO₂ 45H

Hydrogen Sulphide + Sulphur Dioxide 0.02-8% Brown Pale Yellow 3

4-Hydroxy-4-methyl-2-pentanone C₆H₁₂O₂

See Diacetone Alcohol

I

Iodine I₂ 9L Nitrogen Dioxide 0.2-12 White Yellowish Orange 3

80 Acid Gases 0.12-2.4 Pale Bluish

Purple Light Bluish Grey 2

Isoamyl Acetate CH₃CO₂(CH₂)₂CH(CH₃)₂ 148 Isoamyl Acetate 10-200 Yellow Pale Blue 2

Isoamyl Alcohol (CH₃)₂CH(CH₂)₂OH 117 Isoamyl Alcohol 5-300 Yellow Pale Blue 3

Isobutane (CH₃)₃CH


104 Butane 55-3080 Orange Dark Green 3

Isobutene (CH₃)₂C:CH₂ 101L Gasoline (Petrol) 0.07-2.2% Orange Dark Green 3

Isobutyl Acetate CH₃CO₂CH₂CH(CH₃)₂ 144 Isobutyl Acetate 10-300 Yellow Blackish Brown 2







Colour Change

Shelf Life (Year)

Chemical Formula

Original Stain

Isobutyl Acrylate CH₂:CHCO₂CH₂CH(CH₃)₂ 142L Butyl Acetate 2.6-78 Yellow Dark Brown 2

Isobutyl Alcohol (CH₃)₂CHCH₂OH 116 Isobutyl Alcohol 10-150 Yellow Pale Blue 3

Isooctane (CH₃)₃CCH₂CH(CH₃)₂ 101 Gasoline (Petrol) 0.027-0.54% Orange Dark Green 3

Isopentane (CH₃)₂CHCH₂CH₃ 103 Hydrocarbons (Lower Class)++ 0.045-2.16% Yellowish Brown Greenish Brown 2

Isopentyl Acetate See Isoamyl Acetate

Isopentyl Alcohol See Isoamyl Alcohol

Isophorone C₉H₁₄O 154 Cyclohexanone 2-30 Pale Yellow Yellow 2*

Isopropyl Acetate CH₃CO₂CH(CH₃)₂ 146 Isopropyl Acetate 10-500 Yellow Blackish Brown 2

Isopropyl Alcohol (IPA) CH₃CH(OH)CH₃ (i-C₃H₇OH)

113 Isopropyl Alcohol 0.02-5% Pink Pale Blue 3



Isopropyl Amine (CH₃)₂CHNH₂ 180 Amines 5.5-110 Pink Salmon Pink 3


Orange 2

Isopropyl Ether [(CH₃)₂(CH)₂O 141L Ethyl Acetate 22.5-720 Yellow Blackish Brown 2

161 Ethyl Ether 0.018-0.45% Orange Dark Green 3

Isopropyl Mercaptane (CH₃)₂CHSH 70 Mercaptans 10-240 White Yellow 3

Isovaleric Acid (CH₃)₂CHCH₂CO₂H 81 Acetic Acid 2-50 Pink Yellow 3


L

LPG (Liquidfied Petroleum Gas) 100A LPG 0.02-0.8% Orange Blackish Green 3

M

Maleric Anhydride C₄H₂O₃ 81 Acetic Acid 0.8-20 Pink Yellow 3

Mercaptans R ∙ SH 70 Mercaptans 0.5-120 White Yellow 3


2-Mercaptoethanol HSCH₂CH₂OH 75L tert-Butyl Mercaptan 0.5-7.5 Yellow Pink 2*

Mercury Vapour Hg 40 Mercury Vapour 0.05-

13.2mg/m³ White Pale Orange 3

Mesityl Oxide (CH₃)₂C:CHCOCH₃ 141L Ethyl Acetate 27-1080 Yellow Blackish Brown 2

Methacrylic Acid CH₂:C(CH₃)COOH 81 Acetic Acid 1.8-45 Pink Yellow 3


Methacrylonitrile CH₂:C(CH₃)CN 192 Methacrylonitrile 0.2-32 Yellow Red 3







Colour Change

Shelf Life (Year)

Chemical Formula

Original Stain

Methaldehyde (CH₃CHO)n 91L Formaldehyde 0.065-3.25 Yellow Reddish Brown 3*

Methanethiol See Methyl Mercaptan

Methanol CH₃OH 111 Methanol 0.002-4.5% Pink Pale Blue 3

111L Methanol 20-1000 Pink Pale Blue 3

111LL Methanol 2-56 Pale Yellow Pale Bluish Green 2

2-Methoxyethyl Acetate CH₃CO₂CH₂CH₂OCH₃ 113L Isopropyl Alcohol 20-1300 Pink Pale Blue 3

1-Methoxy-2-Propanol CH₃OCH₂CH(OH)CH₃ 113L Isopropyl Alcohol 50-800 Pink Pale Blue 3


Methyl Alcohol See Methanol

Methyl Acrylate CH₂:CHCO₂CH₃ 141L Ethyl Acetate 8-320 Yellow Blackish Brown 2

2-Methyl Allyl Chloride CH₃CH₂:CHCH₂Cl 131LA Vinyl Chloride 2.8-55 Yellow Reddish Brown 2*

Methylamine CH₃NH₂ 180 Amines 5-100 Pink Pale Brown/Yellow 3


N-Methyl Aniline C₆H₅NHCH₃ 181 Aniline 3.5-42 Pale Yellow Pale Green 3

Methyl Bromide CH₃Br 136H Methyl Bromide 10-600 White Yellow 3

136L Methyl Bromide 2.5-200 White Yellow 2

136LA Methyl Bromide 1-36 White Yellow 2

2-Methyl-3-Butenenitrile (CH₃)₂CHCH:CHCN 191L Acrylonitrile 0.4-12 Yellow Pink 3

Methyl Chloroform See 1, 1, 1-Trichloroethylene

Methyl Chloroformate ClCO₂CH₃ 131LA Vinyl Chloride 58-1160 Yellow Reddish Brown 2*

Methylcyclohexane C₆H₁₁CH₃ 102H n-Hexane 0.04-0.84% Orange Dark Green 3

Methylcyclohexanol CH₃C₆H₁₀OH 119 Methylcyclohexanol 5-100 Yellow Pale Blue 2

Methylcyclohexanone C₇H₁₂O 155 Methylcyclohexanone 2-100 Pale Yellow Yellow 2*

Methylene Chloride CH₂Cl₂ 138 Methylene Chloride 20-500 White Pale Pink 3

138L Methylene Chloride 4-150 White Pale Pink 2

Methylene Iodide CH₂I₂ 121L Benzene+ 0.22-22 White Dark Green 3

Methyl Ether CH₃OCH₃ 161 Ethyl Ether 0.03-0.85% Orange Dark Green 3

Methyl Ethyl Ketone (MEK) CH₃COC₂H₅ 152 Methyl Ethyl Ketone 0.02-0.6% Orange Dark Green 3

152L Methyl Ethyl Ketone 10-384 Yellow Reddish Purple 2*


Methyl Hydrazine H₂NNHCH₃ 185 Hydrazine 0.6-12 Pink Yellow 3







Colour Change

Shelf Life (Year)

Chemical Formula

Original Stain

Methyl Iodide CH₃l 230H Methyl Iodide 100-34800 White Dark Brown 2

230 Methyl Iodide 0.5-108 White Grey 1*

121L Benzene+ 0.32-32 White Dark Green 3

Methyl Isobutyl Ketone (CH₃)₂CHCH₂COCH₃ 153 Methyl Isobutyl Ketone 0.05-0.6% Orange Dark Green 3

153L Methyl Isobutyl Ketone 2.5-130 Pale Yellow Pale Blue 1

Methyl Mercaptan CH₃SH 71H Methyl Mercaptan 20-2700 White Yellow 3

71 Methyl Mercaptan 0.25-140 White Yellow 3

70 Mercaptans 0.35-84 White Yellow 3


Methyl Merthacrylate CH₂:C(CH₃)CO₂CH₃ 149 Methyl Methacrylate 10-500 Yellow Pale Blue 2

N-Methyl Morpholine CH₃N(C₂H₄)₂O 180 Amines 5-100 Pink Yellow 3


4-Methyl Pyridine C₆H₇N 182 Pyridine 0.38-10.5 Pink Yellow 3

N-Methyl Pyrrolidone C₅H₉NO 180 Amines 50-270 Pink Yellow 3

Monochlorobenzene See Chlorobenzene

Morpholine NH(C₂H₄)O 180 Amines 9-180 Pink Yellow 3


N

Napthalene C₁₀H₈ 60 Phenol 0.5-14 Pale Yellow Grey 2*

Nitric Acid HNO₃ 15L Nitric Acid 0.1-40 Yellow Reddish Purple 3

80 Acid Gases 5-100 Purple Bluish

Purple Pale Red Purple 2

Nitrogen Dioxide NO₂ 9L Nitrogen Dioxide 0.5-125 White Yellowish Orange 3

10 NO + NO₂+ (Separate Quantification) 2.5-200 White Yellowish Orange 3

80 Acid Gases 0.2-4 Pale Bluish

Purple Pinkish Grey 2

Nitric Oxide NO 10 NO + NO₂+ (Separate Quantification) 2.5-200 White Yellowish Orange 3

Nitrogen Oxides NO+NO₂ 11HA Nitrogen Oxides (Total Quantification) 50-2500 White Green 2







Colour Change

Shelf Life (Year)

Chemical Formula

Original Stain

O

Octane CH₃(CH₂)₆CH₃ 101 Gasoline (Petrol) 0.036-0.72% Orange Dark Green 3


Olefines 100A LPG 0.34-13.6% Orange Blackish Green 3

Oxygen O₂ 31B Oxygen 3-24% Black White 3

Ozone O₃ 18M Ozone 4-400 Orange Pale Yellow 3

18L Ozone 0.025-3 Blue White 3

P

Pentachloroethane Cl₂CHCCl₃ 133L Tetrachloroethylene 40-500 Yellow Pink 2*

1,3-Pentadiene CH₃CH:CHCH:CH₂

174 1,3-Butadiene 250-4000 Pale Yellow White 3

174L 1,3-Butadiene 42.5-850 Pale Yellow White 3

Pentamethylenediamine H₂N(CH₂)₅NH₂ 180L Amines 0.75-15 Pink Greyish Purple 2

n-Pentane CH₃(CH₂)₃CH₃ 104 Butane 30-1680 Orange Dark Green 3

103 Hydrocarbons (Lower Class)++ 0.0375-1.8%

Yellowish Brown Greenish Brown 2

2-Pentenenitrile CH₃CH₂CH:CHCN

193 2-Pentenenitrile 0.5-15 Yellow Red 3

191L Acrylonitrile 0.24-7.2 Yellow Pink 3

3-Pentenenitrile CH₃CH:CHCH₂CN 191L Acrylonitrile 0.4-12 Yellow Pink 3

Pentyl Acetate See n-Amyl Acetate

Perchloroethylene See Tetrachloroethylene

Petroleum Benzine 106 Petroleum Naphtha 0.5-28mg/l Orange Dark Green 3

Petroleum Distillates See Gasoline (Petrol)

Petroleum Ether 106 Petroleum Naphtha 0.5-28mg/l Orange Dark Green 3

Nitrogen Oxides NO+NO₂

11S Nitrogen Oxides (Total Quantification) 5-625 White Pale Green 2

11L Nitrogen Oxides (Total Quantification) 0.04-16.5 White Yellowish Orange 3

Nitrotrichloromethane See Chloropicrin

Nonane CH₃(CH₂)₇CH₃ 105 Hydrocarbons (higher class) 130-3900 White Blackish Brown 3

Petroleum Naphtha 106 Petroleum Naphtha 0.5-28mg/l Orange Dark Green 3

Phenol C₆H₅OH 60 Phenol 0.4-187 Pale Yellow Grey 2*

Phenylethylene See Styrene

Phosgene COCl₂ 16 Phosgene 0.05-20 White Yellow 1.5*

Phosphine PH₃ 7H Phosphine 200-5500 Yellow Dark Brown 2

7J Phosphine 2.5-1000 White Pale Yellow 3

7 Phosphine 2.5-100 White Pale Yellow 3

7L Phosphine 0.15-5 Pale Yellow Purple 3

7LA Phosphine 0.05-9.8 Yellow Red 2

α-Pinene C₁₀H₁₆ 121 Benzene 95-1140 White Dark Green 3

Propane CH₃CH₂CH₃ 103 Hydrocarbons (Lower Class)++ 0.05-2.4%

Yellowish Brown Greenish Brown 2




Gas or Vapour to be

Measured/



Colour Change

Shelf Life (Year)

Chemical Formula

Original Stain

Propionaldehyde CH₃CH₂CHO 91L Formaldehyde 0.76-38 Yellow Reddish Brown 3*


Propionic Acid CH₃CH₂COOH 81 Acetic Acid 3-75 Pink Yellow 3


Propionitrile CH₃CH₂CN 191 Acrylonitrile+ 50-1200 Yellow Red 3

Propyl Acetate CH₃CO₂CH₂CH₂CH₃ 145 Propyl Acetate 20-500 Yellow Blackish Brown 2

Propyl Alcohol CH₃(CH₂)₂OH 113 Isopropyl Alcohol 0.04-2.5% Pink Pale Blue 3



Propylamine CH₃(CH₂)₂NH₂ 180 Amines 6-120 Pink Salmon Pink 3


Propylene CH₃CH:CH₂ 100A LPG 0.02-0.8% Orange Blackish Green 3

Propylene Dichloride CH₃CHClCH₂Cl 131LA Vinyl Chloride+ 40-800 Yellow Reddish Brown 2*

Propylene Imine CH₃CHCH₂NH 180 Amines 5.5-110 Pink Yellow 3


Propylene Oxide CH₃CHCH₂O 163 Ethylene Oxide 0.065-3.9% Orange Green 3

163L Ethylene Oxide 1-100 Yellow Reddish Brown 1*

Propyl Mercaptan CH₃(CH₂)₂SH 70 Mercaptans 22.5-540 White Yellow 3

70L Mercaptans 0.12-9.6 White Red 2

Pyridine C₅H₅N 182 Pyridine 0.2-35 Pink Yellow 3

S

Stoddard Solvent 128 Stoddard Solvent 50-

8000mg/m³ White Brown (ring) 3

Styrene C₆H₅CH:CH₂ 124 Styrene 10-1500 White Yellow 3

124L Styrene 2-100 White Yellow 3

153 Methyl Isobutyl Ketone 0.075-0.9% Orange Dark Green 3

Sulphur Dioxide SO₂ 5H Sulphur Dioxide 0.05-8% Orange Green 3

5M Sulphur Dioxide 20-3600 Purple Yellow 3

5L Sulphur Dioxide 1.25-200 Blue Yellow 3

5LA Sulphur Dioxide 0.5-60 Blue Yellow 3

5LC Sulphur Dioxide 0.1-25 Bluish Purple White 3

5LB Sulphur Dioxide 0.05-10 Yellowish Green Yellow 3




Gas or Vapour to be

Measured/



Colour Change

Shelf Life (Year)

Chemical Formula

Original Stain

Sulphur Dioxide SO₂

45S

Hydorgen Sulphide, Sulphur Dioxide (Separate Quantificaton)+ SO₂: 0.25-20 Yellowish Green Yellow 3

80 Acid Gases 1.5-30 Pale Bluish

Purple Yellow 2

Sulphuric Acid H₂SO₄ 35 Sulphuric Acid 0.5-5mg/m³ Pale Yellow Reddish Purple 2

T

1,1,2,2-Tetrabromoethane Br₂CHCHBR₂ 135L 1,1,1-Trichloroethane+ 0.92-9.2 White Pale Pink 2

1,1,2,2-Tetrachloroethane Cl₂CHCHCl₂ 131L Vinyl Chloride+ 2-30 Yellow Reddish Brown 2*

Tetrachloroethylene Cl₂C:CCl₂ 133HA Tetrachloroethylene 7-900 Yellow Reddish Purple 2*

133M Tetrachloroethylene 2-250 Yellow Reddish Purple 2*

133L Tetrachloroethylene 1-75 Yellow Pink 2*

133LL Tetrachloroethylene 0.1-9 Yellow Purple 2*

132HH Trichloroethylene 0.075-1.5% White Yellowish Brown 3

Tetrachloromethane See Carbon Tetrachloride

Tetrahydrofuran C₄H₈O 159 Tetrahydrofuran 20-800 Pink Pale Blue 3


Tetrahydrothiophene C₄H₈S 76H Tetrahydrothiophene+ 10-200 Pink Pale Yellow 2

76M Tetrahydrothiophene+ 10-100mg/m³ Pink Pale Yellow 2

76 Tetrahydrothiophene+ 1-10 Pink Pale Yellow 2

Tetramethylenediamine H₂N(CH₂)₄NH₂

180 Amines 8.5-170 Pink Yellowish Purple 3

180L Amines 0.8-16 Pink Grey 2

Thionyle Chloride SOCl₂ 5LA Sulphur Dioxide 1.44-21.6 Blue Yellow 3

Toluene C₆H₅CH₃ 122 Toluene 5-690 White Brown 3



Toluol See Toluene

o-Toluidine C₆H₄(CH₃)(NH₂) 181 Aniline 5-60 Pale Yellow Pale Green 3

Trichloroacetic Acid CCl₃COOH 15L Nitric Acid 1-37.5 Yellow Reddish Purple 3

1,2,4-Trichlorobenzene C₆H₃Cl₃ 131LA Vinyl Chloride+ 0.65-13 Yellow Reddish Brown 2*

1,1,1-Trichloroethane CH₃CCl₃ 135 1,1,1-Trichloroethane+ 100-2000 White Reddish Orange 3

135L 1,1,1-Trichloroethane+ 6-900 White Pale Pink 2

171 Acetylene 0.06-1.2% White Brown 3

1,1,2-Trichloroethane Cl₂CHCH₂Cl 135 1,1,1-Trichloroethane+ 220-750 White Reddish Orange 3




Gas or Vapour to be

Measured/



Colour Change

Shelf Life (Year)

Chemical Formula

Original Stain

Trichloroethylene Cl₂C:CHCl 132HH Trichloroethylene 0.05-2.5% White Yellowish Brown 3

132HA Trichloroethylene 20-1300 Yellow Reddish Purple 2*

132M Trichloroethylene 2-250 Yellow Reddish Purple 2*

132L Trichloroethylene 1-70 Yellow Purple 2*

132LL Trichloroethylene 0.125-8.8 Yellow Purple 2*

Trichloromethane See Chloroform

Trichloronitromethane See Chloropicrin

1,2,3-Trichloropropane CH₂ClCHClCH₂Cl 135L 1,1,1-Trichloroethane+ 36-360 White Pale Pink 2

Triethylamine (C₂H₅)₃N 180 Amines 4.5-90 Pink Yellow 3

180L Amines 0.3-6 Pink Yellow Or Pale Orange 2

Trimethylamine (CH₃)₃N 3M Ammonia 25-250 Purple Yellow 3

180 Amines 3.5-70 Pink Yellow 3

180L Amines 0.25-5 Pink Yellow Or Pale Orange 2

Trimethyl Benzene C₆H₃(CH₃)₃ 123 Xylene 10-300 White Brown 3

V

Valeric Acid CH₃(CH₂)₃COOH 81L Acetic Acid 0.38-15 Pink Pale Yellow 2*

Vinyl Acetate CH₃CO₂CH:CH₂ 143 Vinyl Acetate+ 5-250 White Brown 3

141 Ethyl Acetate 0.06-0.9% Orange Dark Green 3

Vinyl Benzene See Styrene

Vinyl Chloride CH₂:CHCl 131 Vinyl Chloride 0.025-2% Orange Dark Green 3

131LA Vinyl Chloride+ 0.25-54 Yellow Reddish Brown 2*

131L Vinyl Chloride+ 0.1-6.6 Yellow Reddish Brown 2*

131LB Vinyl Chloride 0.25-70 Yellow Purple 2*

Vinyl Cyanide See Acrylonitrile

Vinylidene Chloride CH₂:CCl₂ 130L Vinylidene Chloride 0.4-40.6 Yellow Reddish Brown 2*

Vinyl Trimethoxysilane CH₂:CHSi(OCH₃)₃ 113L Isopropyl Alcohol 2.5-40 Pink Pale Blue 3

W

Water Vapour H₂O 6 Water Vapour 0.5-32mg/l Yellowish Green Purple 3

6L Water Vapour 0.05-2mg/l Yellow Purple 3

6LP Pipeline Dew Point Tube 3-100LB/MMCF Yellow Greenish Purple 3

6LP Pipeline Dew Point Tube 2-10LB/MMCF Yellow Green 3

X

Xylene C₆H₄(CH₃)₂ 123 Xylene 5-625 White Brown 3

123L Xylene 2-200 White Brown 3

100A LPG 0.1-1.2% Orange Blackish Green 3


Technology

a1-cbiss Gastec Tubes