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GFS Chemicals Reagents
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Specialty Chemical Manufacturing Expertise
Since 1928
GFS ChemicalsAnalytical Reagents& Solutions
2006-2007 PRODUCT CATALOG
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pH Reference Buffers GFS Chemicals’ pH Buffers aremanufactured from the finesthigh-purity water and reagentgrade chemicals. They arestandardized at 25°C againstNIST reference materials to atolerance of 0.01 on Buffers4.00, 7.00, and 10.00 and to atolerance of 0.02 on all otherbuffer ranges. Our buffers are
used with confidence for allapplications because stan-dardization is performedusing the most trusted instru-ments in the business – Orion,Beckman-Coulter, and Hanna,to name a few. For simplicity,all common buffers are thesame price regardless of pHor if color coded. This catalogfeatures not only new prod-
ucts but also new unit sizes,including bulk containers, andcase pricing. Certificates ofAnalysis are provided withevery shipment and includeNIST Traceability.
Primary StandardsEven with the automation ofso many lab methods, itremains essential to verifyanalytical standard solutions.For over 75 years, GFSChemicals has provided pri-mary standards to supportanalytical chemists worldwidewith traceability as well as theconfidence that their resultsare accurate.
GFS continues to supportchemists performing suchtitrations as acid-base, redox,complexometric, and manyothers. Following is a list ofmany common primary stan-dards manufactured by GFS.Throughout the catalog, manyothers are listed and we wel-come inquiries for yourunique standards.
pH Reference Buffers
and PrimaryStandards
For acid-base: diphenylguani-dine, constant boiling perchlo-ric acid, potassium acidphthalate, potassium bi-iodate, sulfamic acid, and tris-hydroxymethyl-aminomethane.
For redox titrimetry the fol-lowing are listed as primarystandards: ceric ammoniumnitrate, ferrous ethylenedi-ammonium sulfate, electrolyt-ic iron, potassium bi-iodate,potassium dichromate, andsodium oxalate.
For complexation titrimetry(EDTA): calcium carbonate,disodium dihydrogen ethyl-enediaminetetraacetate dihy-drate, and magnesium iodatetetrahydrate.
Other specially prepared pri-mary standards include sodi-um chloride for argentimetrictitrations; and cobalt sulfatefor volumetric and colorimet-ric analyses.
Find these items by name inthe alphabetical listing in thiscatalog. For more information,request GFS Chemicals publi-cation No. 497, StandardSubstances and Solutions (seepage facing inside back cover).
Complexometric Titration ReagentsA spectacular advance in ana-lytical chemistry was theintroduction of ethylenedi-aminetetraacetate as a stan-dard solution in titrations
involving the formation ofcomplex ions.
Of several substances whichcan be used as standard solu-tions in such analyses, sodi-um ethylenediamine-tetraacetate (EDTA) is one ofthe most satisfactory in that itforms highly stable complexions with calcium, magnesiumand numerous other metals. Asolution of disodium dihydro-gen ethylenediaminetetra-acetate (pH 5.5) is usuallyused as the standard solution.
The most common of suchtitrations is the determinationof calcium and magnesium, asin analysis of waters for hard-ness, or of limestone. Theend-point may be detected invarious ways, the most com-mon utilizing the dyestuffEriochrome Black T. Thisdyestuff has the unique prop-erty of itself forming a com-plex ion with magnesium. Ontitration, the EDTA first unites
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pH Values of Buffers at Various Temperatures25o 0o 5o 10o 20o 30o 40o 50o 60o 70o 80o 90o
1.68 1.67 1.67 1.67 1.67 1.68 1.69 1.71 1.72 1.74 1.77 1.794.01 4.00 4.00 4.00 4.00 4.02 4.03 4.06 4.08 4.13 4.16 4.216.86 6.98 6.95 6.92 6.87 6.85 6.84 6.83 6.84 6.85 6.86 6.887.00 7.11 7.08 7.06 7.01 6.98 6.98 6.97 – – – –9.18 9.46 9.40 9.33 9.23 9.14 9.07 9.01 8.96 8.92 8.89 8.8510.01 10.32 10.25 10.18 10.06 9.97 9.89 9.83 – – – –
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with the calcium andmagnesium ions insolution and thenpulls the magnesiumaway from thedyestuff-magnesiumcomplex resulting in acolor change from redto blue. The titrationis carried out at a pHof 10 and yields thesum of the calciumand the magnesiumpresent.
Aqueous solutions ofEriochrome Black Tdo not keep andanother indicator, Calmagite,was introduced for the EDTAtitration of calcium plus mag-nesium. The color change ofCalmagite at the end-point isalso from red to blue but thecolors are clearer and theend-point sharper. Aqueoussolutions of this indicator arestable indefinitely. Carried outunder slightly different condi-tions, pH 12, and with theindicator Calcein, calciumalone may be determined inthe presence of even largeamounts of magnesium. Thisprocedure may be applied tothe determination of calciumin water and in limestone.Calcein modified by the addi-
tion of certain blue dyes, thy-molphthalein or bromthymolblue, gives a somewhat moresatisfying color change at theend-point.
The end-point with Calceinmay be detected also by thedisappearance of the fluores-cence under ultraviolet illumi-nation of the calcium salt.Calcein is prepared by theaction of formaldehyde andiminodiacetic acid on fluores-cein. It is typical of a class ofindicators known at “metalflu-orochromic” indicators.
Another indicator of this classis Calcein Blue(ß-methyl-umbelliferonemeth-ylene- iminodiacetic acid)which is useful in the titrationof copper, cobalt and other
metals with EDTA.
Three primary stan-dard materials areavailable for titrimet-ric work with EDTA.Ordinary reagentgrade calcium carbon-ate contains sufficientmagnesium to make itunacceptable as a pri-mary standard but aspecial, low-magne-sium grade is avail-able, Item# 337. Aboutthe only good primary standardmagnesium
compound is magnesiumiodate tetrahydrate, describedin 1962 by Lindstrom andStevens; this material is avail-able as Item# 348. DisodiumDihydrogen Ethylenediamine-tetraacetate Dihydrate, thereagent used to prepare EDTAsolutions, is itself a good pri-mary standard when properlyprepared, item #365.
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ANALYTICAL REAGENTS & SOLUTIONSITEM # DESCRIPTION PAGE #
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2001 ACETATE BUFFER FOR CHLORINE (APHA) pH 4 1611131 ACETIC ACID, SOLUTION, 1.0 N 1632008 ACETIC ACID, SOLUTION, 0.5 N 1632007 ACETIC ACID, SOLUTION, 0.10 N 1632006 ACETIC ACID SOLUTION, 70% 1632005 ACETIC ACID SOLUTION, 30% V/V 1632004 ACETIC ACID SOLUTION, 20% V/V 1632256 ACETIC ACID SOLUTION, 15% V/V 1632003 ACETIC ACID SOLUTION, 12.5% (1+7) 1642002 ACETIC ACID SOLUTION, 10% V/V 1642009 ACID DIGESTION MIXTURE 1662010 ACID SOLUTION FOR PHOSPHATE (APHA) 1662285 AMMONIACAL BUFFER, pH 10, FOR EDTA TITRATIONS 1762405 AMMONIUM ACETATE SOLUTION, 10%, AQUEOUS 1772016 AMMONIUM BIFLUORIDE SOLUTION, 5%, AQUEOUS 1772019 AMMONIUM CHLORIDE SOLUTION, 0.1 M 1782018 AMMONIUM CHLORIDE SOLUTION, 8.5% W/V 1782017 AMMONIUM CHLORIDE SOLUTION, 5% W/V 1792020 AMMONIUM CHLORIDE-EDTA REAGENT SOLUTION 1792021 AMMONIUM CITRATE SOLUTION, 54% (ASTM) 1792022 AMMONIUM CITRATE-SODIUM BORATE SOLUTION, (ASTM FOR IRON) 1793553 AMMONIUM HYDROXIDE SOLUTION, 1 N 1831136 AMMONIUM HYDROXIDE SOLUTION, 10% V/V 1832023 AMMONIUM HYDROXIDE SOLUTION, 5% V/V 1831137 AMMONIUM MOLYBDATE SOLUTION, 10%, REAGENT 1842024 AMMONIUM MOLYBDATE SOLUTION, 4% 1841142 AMMONIUM MOLYBDATE, REAGENT #1 1841141 AMMONIUM MOLYBDATE, REAGENT #2 1842027 AMMONIUM OXALATE SOLUTION, 5% W/V 1852029 AMMONIUM PHOSPHATE, DIBASIC, 30%, SOLUTION 1862028 AMMONIUM PHOSPHATE, DIBASIC, 10%, SOLUTION 1862030 AMMONIUM SULFATE SOLUTION, 1 M 1872449 AMMONIUM SULFIDE, 20% AQUEOUS SOLUTION 1881138 AMMONIUM THIOCYANATE SOLUTION, 0.1 N 1892031 AMMONIUM THIOCYANATE SOLUTION, 10% W/V 1892032 ANTIMONY POTASSIUM TARTRATE, SOLUTION 1921860 BARIUM CHLORIDE SOLUTION, 1.0 N 1961143 BARIUM CHLORIDE SOLUTION, 0.5 M (12%) 1962034 BARIUM CHLORIDE SOLUTION, 0.1 M 1962190 BARIUM CHLORIDE SOLUTION, 0.005 M 1962033 BARIUM CHLORIDE SOLUTION, 10% W/V 1965000 BARIUM PERCHLORATE, 0.01 N, AQUEOUS SOLUTION 1982035 BENEDICT’S SOLUTION, QUANTITATIVE 2011681 BENZOIC ACID, PRIMARY STANDARD 2012037 BORATE BUFFER SOLUTION, pH 9.5 2082039 BORIC ACID SOLUTION, 5% W/V 2092387 BORIC ACID, 4% ABSORBANT 2092038 BORIC ACID ABSORBANT SOLUTION, 2% 2092041 BROMCRESOL PURPLE SOLUTION, 0.04% AQUEOUS 2112340 BUFFER CONCENTRATE, pH 4.00 2162335 BUFFER CONCENTRATE, pH 7.00 2162341 BUFFER CONCENTRATE, pH 10.00 2162549 BUFFER pH 4, 7, 10 KIT 2162044 BUFFER SOLUTION FOR ZINC, pH 9 2162325 BUFFER SOLUTION, pH 1.00 217
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1631 BUFFER SOLUTION, pH 1.68 2171632 BUFFER SOLUTION, pH 2.00 2171633 BUFFER SOLUTION, pH 3.00 217680 BUFFER SOLUTION, pH 4.00 2171634 BUFFER SOLUTION, pH 4.00, (COLOR CODED RED) 2171635 BUFFER SOLUTION, pH 5.00 2171636 BUFFER SOLUTION, pH 5.50 2171637 BUFFER SOLUTION, pH 6.00 2181638 BUFFER SOLUTION, pH 6.86 218681 BUFFER SOLUTION, pH 7.00 2181639 BUFFER SOLUTION, pH 7.00, (COLOR CODED YELLOW) 2181640 BUFFER SOLUTION, pH 7.00, (COLOR CODED GREEN) 2181641 BUFFER SOLUTION, pH 7.38 2181642 BUFFER SOLUTION, pH 8.00 2181643 BUFFER SOLUTION, pH 9.00 2181644 BUFFER SOLUTION, pH 9.18 219682 BUFFER SOLUTION, pH 10.00 2191645 BUFFER SOLUTION, pH 10.00, (COLOR CODED BLUE) 2192548 BUFFER SOLUTION, pH 11.00 2191646 BUFFER SOLUTION, pH 11.33 2191647 BUFFER SOLUTION, pH 12.00 2192176 BUFFER SOLUTION, pH 12.45 219337 CALCIUM CARBONATE, PRIMARY STANDARD (ACS) 2291148 CALCIUM CHLORIDE, SOLUTION, 2.75% 23015 CERIC AMMONIUM NITRATE, CERTIFIED 23814 CERIC AMMONIUM NITRATE, PRIMARY STANDARD 23922 CERIC PERCHLORATE, SOLUTION, 0.5N 24125 CERIC SULFATE, SOLUTION, 0.5N 2411983 CERIC SULFATE SOLUTION, 0.4 N 241716 CERIC SULFATE, SOLUTION, 0.2500N 24126 CERIC SULFATE, SOLUTION, 0.1 N 242519 CERIC SULFATE, SOLUTION, 0.0500N 2421284 CERIC SULFATE, SOLUTION, 0.0179N 2421991 CHLORIDE COLOR REAGENT, MERCURIC THIOCYANATE 0.06% SOLUTION 2482349 CHLORIDE COLORIMETRIC ANALYSIS REAGENT SET 2492048 CITRIC ACID SOLUTION, 10% W/V 2602049 CITRIC BUFFER SOLUTION 2602050 COBALT CHLORIDE, 1.2% SOLUTION, APHA for NITROGEN 2622051 COLOR STANDARD SOLUTION, APHA 500 2642381 CONDUCTIVITY STANDARD 25,000 uS/cm 2653747 CONDUCTIVITY STANDARD, 12,880 uS/cm 2652174 CONDUCTIVITY STANDARD 1413 uS/cm 265686 COPPER, PRIMARY STANDARD REAGENT (ACS), SHOT 2732054 CUPRIC SULFATE SOLUTION, 0.01 M 2722053 CUPRIC SULFATE SOLUTION, 5% W/V 272666 CUPRIETHYLENEDIAMINE SOLUTION, 1M 2736661 CUPRIETHYLENEDIAMINE SOLUTION, 0.5M 2732358 N,N’-DIETHYL-N,N’-bis(SULFOPROPYL)ETHYLENEDIAMINE, DESPEN 2922359 N,N’-DIETHYLPIPERAZINE, DEPP 2922060 DIMETHYLGLYOXIME SOLUTION, 1% IN ALCOHOL 300136 DIPHENYLGUANIDINE, PRIMARY STANDARD 305365 DISODIUM DIHYDROGEN ETHYLENEDIAMINETETRAACETATE DIHYDRATE,
PRIMARY STANDARD 308720 DISODIUM DIHYDROGEN ETHYLENEDIAMINETETRAACETATE SOLUTION, 0.1M 3081553 DISODIUM DIHYDROGEN ETHYLENEDIAMINETETRAACETATE SOLUTION, 0.0575M 308
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1151 DISODIUM DIHYDROGEN ETHYLENEDIAMINETETRAACETATE SOLUTION, 0.05M 3081152 DISODIUM DIHYDROGEN ETHYLENEDIAMINETETRAACETATE SOLUTION, 0.01M 3081282 ELECTROLYTE SOLUTION 318330 ETHYLENEGLYCOL-bis-(AMINOETHYLETHER)-TETRAACETIC ACID, REAGENT (EGTA) 3252066 FERRIC CHLORIDE SOLUTION, 10% W/V 3341157 FERRIC CHLORIDE SOLUTION, 0.025% 3342069 FERRIC NITRATE SOLUTION, 40.4% in 8% Nitric Acid 3352068 FERRIC NITRATE SOLUTION, 20% W/V 3352067 FERRIC NITRATE SOLUTION, 5% in 2.5% Nitric Acid 33541 FERROUS ETHYLENEDIAMMONIUM SULFATE, PRIMARY STANDARD 336927 HEXAMETHYLENETETRAMINE, REAGENT (ACS) 3562350 n-HEXANE-MTBE 80-20 MIXTURE 3572171 HYDROCHLORIC ACID, SOLUTION 6.0 N 3661572 HYDROCHLORIC ACID, SOLUTION, 2 N 366382 HYDROCHLORIC ACID, SOLUTION, 1.0 N 3661162 HYDROCHLORIC ACID, SOLUTION, 0.5 N 3672330 HYDROCHLORIC ACID, SOLUTION, 0.2 N 367722 HYDROCHLORIC ACID, SOLUTION, 0.1 N 3672071 HYDROCHLORIC ACID, SOLUTION, 0.05 N 3672535 HYDROCHLORIC ACID, SOLUTION, 0.02 N 3671161 HYDROCHLORIC ACID, SOLUTION, 0.01 N 3673578 HYDROCHLORIC ACID, 0.1 N, in ISOPROPYL ALCOHOL 3672305 HYDROCHLORIC ACID, 10% V/V, 1 + 9 3673790 HYDROGEN PEROXIDE, 50% SOLUTION 368932 HYDROGEN PEROXIDE, 30%, REAGENT (ACS) 3699321 HYDROGEN PEROXIDE SOLUTION, 3% 369771 HYDROXYETHYLETHYLENEDIAMINETRIACETIC ACID, TRISODIUM SALT, REAGENT 3702072 HYDROXYLAMMONIUM CHLORIDE SOLUTION, 50% AQUEOUS W/V 3711543 HYDROXYLAMMONIUM CHLORIDE SOLUTION, 20% AQUEOUS 3711083 HYDROXYLAMMONIUM CHLORIDE SOLUTION, 10% AQUEOUS 3712074 IODINE, TINCTURE 3791163 IODINE, SOLUTION, 1 N 3782073 IODINE, SOLUTION, 0.5 N 3781164 IODINE, SOLUTION, 0.1 N 379226 IRON, ELECTROLYTIC, PRIMARY STANDARD 3821591 LANTHANUM CHLORIDE, SOLUTION, 10% 3922075 LEAD ACETATE, 10% SOLUTION 3952076 LEAD PERCHLORATE SOLUTION, 0.1 M 397348 MAGNESIUM IODATE, TETRAHYDRATE, PRIMARY STANDARD 4101168 MAGNESIUM SULFATE SOLUTION 2.25% 4132078 MANGANESE SULFATE, SOLUTION 4162079 MERCURIC CHLORIDE SOLUTION, 1% 4182080 MERCURIC NITRATE SOLUTION, 0.1 N 4181858 MERCURIC SULFATE SOLUTION 4192338 MERCURIC SULFATE SOLUTION, FOR DIGESTION 4192352 MERCURIC THIOCYANATE, SOLUTION, 0.48% in METHYL ALCOHOL 4192365 4-(N-MORPHOLINO)BUTANESULFONIC ACID, MOBS 4382364 2-(N-MORPHOLINO)ETHANESULFONIC ACID, MES 4382363 3-(N-MORPHOLINO)PROPANESULFONIC ACID, MOPS 438969 NESSLER REAGENT, Mercuric Potassium Iodide, Solution 4451176 NITRIC ACID, SOLUTION, 1.0 N 4512257 NITRIC ACID SOLUTION, 0.5 N 4521175 NITRIC ACID, SOLUTION, 0.1 N 4521278 NITRIC ACID, SOLUTION, 15% W/W 4521280 NITRIC ACID, SOLUTION, 10% W/W 452
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ANALYTICAL REAGENTS & SOLUTIONSITEM # DESCRIPTION PAGE #
2089 o-NITROPHENOL SOLUTION, 0.3% AQUEOUS 4542087 m-NITROPHENOL SOLUTION, 0.1% AQUEOUS 4542088 m-NITROPHENOL INDICATOR SOLUTION, 1% IN ETHANOL 4542090 p-NITROPHENOL SOLUTION, 0.1% AQUEOUS 45464 OSMIUM TETROXIDE, SOLUTION, 0.01 M in 0.1 M sulfuric acid 4652092 OXALIC ACID SOLUTION, 0.1 N 4662091 OXALIC ACID SOLUTION, 10% W/V 4661677 PERCHLORIC ACID SOLUTION, 0.1 N, AQUEOUS 47671 PERCHLORIC ACID SOLUTION, 0.1 N IN ACETIC ACID 4762963 PHENOLDISULFONIC ACID, SOLUTION 478726 PHENOLPHTHALEIN SOLUTION, 1% 4782286 PHENYLARSINE OXIDE, SOLUTION, 0.00564 N 4792182 PHOSPHATE BUFFER FOR CHLORINE, pH 7 4851279 PHOSPHORIC ACID, SOLUTION, 15% 4862360 PIPERAZINE-N,N’-bis(4-BUTANESULFONIC ACID), PIPBS 4882362 PIPERAZINE-N,N’-bis(2-ETHANESULFONIC ACID), PIPES 4882361 PIPERAZINE-N,N’-bis(3-PROPANESULFONIC ACID), PIPPS 488554 POTASSIUM ACID PHTHALATE, PRIMARY STANDARD (ACS) 4942354 POTASSIUM ACID PHTHALATE, BUFFER GRADE 4942096 POTASSIUM ACID PHTHALATE, SOLUTION, 0.100 N 49476 POTASSIUM BIIODATE, CERTIFIED 49575 POTASSIUM BIIODATE, PRIMARY STANDARD (ACS) 495826 POTASSIUM BIIODATE, SOLUTION, 0.025 N 4952546 POTASSIUM BROMATE-BROMIDE, SOLUTION, 0.2 N 4962270 POTASSIUM BROMATE-BROMIDE, SOLUTION, 0.1 N 4961179 POTASSIUM CHLORIDE, SOLUTION, 4 M 498384 POTASSIUM CHLORIDE, SOLUTION, 1 N 4982097 POTASSIUM CHLORIDE, SOLUTION, 0.1 N 4982098 POTASSIUM CHROMATE, 63% W/V, INDICATOR SOLUTION 4991180 POTASSIUM CHROMATE, SOLUTION, 5% 4992385 POTASSIUM CITRATE, KF WATER STANDARD 49978 POTASSIUM DICHROMATE, CERTIFIED 500730 POTASSIUM DICHROMATE, 0.1 N, SOLUTION 5003571 POTASSIUM DICHROMATE, 0.5 N, SOLUTION 5001563 POTASSIUM DICHROMATE, 0.025 N, SOLUTION 5002100 POTASSIUM FERRICYANIDE, 10% W/V, AQUEOUS SOLUTION 5012101 POTASSIUM FERROCYANIDE, SOLUTION, 10% W/V 5022290 POTASSIUM HYDROXIDE, 45% W/W 5032188 POTASSIUM HYDROXIDE SOLUTION, 2 N 5041184 POTASSIUM HYDROXIDE SOLUTION, 1 N 5041183 POTASSIUM HYDROXIDE SOLUTION, 0.5 N 5041182 POTASSIUM HYDROXIDE SOLUTION, 0.1N 5041976 POTASSIUM HYDROXIDE SOLUTION, 0.5 N IN METHANOL 5041674 POTASSIUM HYDROXIDE SOLUTION, 0.1 N IN METHANOL 5042475 POTASSIUM HYDROXIDE SOLUTION, 0.05 N IN METHANOL 5041984 POTASSIUM HYDROXIDE SOLUTION, 0.01 N IN METHANOL 5041972 POTASSIUM HYDROXIDE SOLUTION 0.1 N, IN ISOPROPANOL 5053572 POTASSIUM HYDROXIDE SOLUTION 0.01 N, in ISOPROPANOL 5051648 POTASSIUM IODATE, SOLUTION, 0.1 N (0.025 mol/L) TITRANT 5051185 POTASSIUM IODATE, SOLUTION, 0.1 N, (0.0167 mol/L) IODIMETRIC STANDARD 5052269 POTASSIUM IODATE-IODIDE, SOLUTION, 0.5 N 5051564 POTASSIUM IODATE-IODIDE, SOLUTION, 0.1 N 5062274 POTASSIUM IODIDE, SOLUTION, 20% 5062191 POTASSIUM IODIDE, SOLUTION 10% W/V 5062102 POTASSIUM IODIDE, SOLUTION, 5% W/V 506
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1861 POTASSIUM PERMANGANATE, SOLUTION, 1.0 N 5091186 POTASSIUM PERMANGANATE, SOLUTION, 0.1 N 5092447 POTASSIUM PERMANGANATE, SOLUTION, 0.0435 N 5092105 POTASSIUM SODIUM TARTRATE, SOLUTION, 20% W/V 5122142 POTASSIUM SODIUM TARTRATE, SOLUTION, 10% W/V 5122103 POTASSIUM THIOCYANATE, SOLUTION, 5% W/V 5131675 SILVER NITRATE, SOLUTION, 1.0 N 5442108 SILVER NITRATE, SOLUTION, 0.5 N 5441228 SILVER NITRATE, SOLUTION, 0.153 N 5442107 SILVER NITRATE, SOLUTION, 0.141 N 544733 SILVER NITRATE, SOLUTION, 0.10 N 5451285 SILVER NITRATE, SOLUTION, 0.05 N 5452106 SILVER NITRATE, SOLUTION, 0.02 N 5453514 SILVER NITRATE, SOLUTION, 0.0141 N 5452187 SILVER NITRATE SOLUTION 10% W/V 5451542 SODIUM ACETATE, SOLUTION, 20%, IN WATER 5481084 SODIUM ACETATE, SOLUTION, 10%, IN WATER 548385 SODIUM ACETATE-2M ACETIC ACID BUFFER 5482110 SODIUM ARSENITE, SOLUTION, 0.1 N 5492111 SODIUM BICARBONATE, SOLUTION 0.1 M 5502112 SODIUM BICARBONATE, 5.5% W/V, SOLUTION 5502115 SODIUM BROMIDE, SOLUTION, 0.1 M 5512114 SODIUM BROMIDE SOLUTION, 10% W/V 5511698 SODIUM CARBONATE, ANHYDROUS, PRIMARY STANDARD (ACS) 5522119 SODIUM CARBONATE, SOLUTION, 1.0 N 5532117 SODIUM CARBONATE SOLUTION, 10% W/V 5532116 SODIUM CARBONATE SOLUTION, 5% W/V 5532123 SODIUM CHLORIDE, SOLUTION, 0.10 N 5532122 SODIUM CHLORIDE, SOLUTION, 0.0141N 5542121 SODIUM CHLORIDE, SOLUTION, 0.1 M 5542120 SODIUM CHLORIDE SOLUTION, 20% W/V 5541599 SODIUM CHLORIDE SOLUTION, 0.9% 5542124 SODIUM CHLORIDE-HYDROXYLAMINE SULFATE SOLUTION 5542125 SODIUM CHROMATE, SOLUTION, 0.5 M 5552126 SODIUM CITRATE, SOLUTION, 30% W/V 5552127 SODIUM CITRATE, SOLUTION 5552128 SODIUM FLUORIDE, SOLUTION, 0.1 M 5571579 SODIUM HYDROXIDE, SOLUTION, 10 N 5581551 SODIUM HYDROXIDE, SOLUTION, 5 N 5581573 SODIUM HYDROXIDE, SOLUTION, 2 N 5581193 SODIUM HYDROXIDE, SOLUTION, 1.0 N 5581192 SODIUM HYDROXIDE, SOLUTION, 0.5 N 5582198 SODIUM HYDROXIDE, SOLUTION, 0.2 N 5591191 SODIUM HYDROXIDE, SOLUTION, 0.1 N 5592172 SODIUM HYDROXIDE, SOLUTION, 0.05 N 5592133 SODIUM HYDROXIDE, SOLUTION, 0.02 N 5592132 SODIUM HYDROXIDE, SOLUTION, 0.01 N 5592291 SODIUM HYDROXIDE, SOLUTION, 0.1 N, IN ETHANOL 5592292 SODIUM HYDROXIDE SOLUTION 0.01 N, IN ALCOHOL 5592131 SODIUM HYDROXIDE SOLUTION, 50% W/W, REAGENT GRADE 5592130 SODIUM HYDROXIDE SOLUTION, 50% W/W, Suitable for Kjeldahl use. 5592129 SODIUM HYDROXIDE SOLUTION, 25% W/W 5601989 SODIUM HYDROXIDE SOLUTION, 10% 5602134 SODIUM HYDROXIDE-THIOSULFATE SOLUTION 5602763 SODIUM HYPOCHLORITE, SOLUTION, 5% AVAILABLE CHLORINE 560
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2135 SODIUM IODIDE, SOLUTION, 0.10 M 5612136 SODIUM IONIC STRENGTH ADJUSTER SOLUTION 5612113 SODIUM META BISULFITE, SOLUTION, 10% W/V 5612137 SODIUM NITRATE, SOLUTION, 5 M 5632192 SODIUM NITRITE, SOLUTION, 0.5 N 5632139 SODIUM NITRITE, SOLUTION, 0.1 M 5632342 SODIUM NITRITE, SOLUTION, 10% 5632138 SODIUM NITRITE, SOLUTION, 5% 56490 SODIUM OXALATE, CERTIFIED, PRIMARY STANDARD 5642141 SODIUM OXALATE, SOLUTION, 0.10 N 5642140 SODIUM OXALATE, SOLUTION, 0.05 N 5642143 SODIUM SULFATE, SOLUTION, 0.10 M 5702145 SODIUM THIOCYANATE SOLUTION, 0.1 N 5712144 SODIUM THIOCYANATE SOLUTION, 10% W/V 5711195 SODIUM THIOSULFATE SOLUTION, 1.0 N 5722177 SODIUM THIOSULFATE SOLUTION, 0.5 N 572736 SODIUM THIOSULFATE SOLUTION, 0.1 N 5722146 SODIUM THIOSULFATE SOLUTION, 0.05 N 5721559 SODIUM THIOSULFATE SOLUTION, 0.01N 5722147 SPADNS SOLUTION 5742149 STANNOUS CHLORIDE, 40%, SOLUTION 5752148 STANNOUS CHLORIDE, 10% W/V, SOLUTION 5752150 STANNOUS CHLORIDE, REAGENT I, SOLUTION 5752151 STANNOUS CHLORIDE, REAGENT II, SOLUTION 57598 SULFAMIC ACID, CERTIFIED, PRIMARY STANDARD 57997 SULFAMIC ACID, PRIMARY STANDARD 5792154 SULFITE-UREA REAGENT SOLUTION 5801977 SULFURIC ACID, SOLUTION, 18 N 5822158 SULFURIC ACID, SOLUTION, 5.00 N 5821557 SULFURIC ACID, SOLUTION, 2.56 N 5831201 SULFURIC ACID, SOLUTION, 1 N 5831200 SULFURIC ACID, SOLUTION, 0.5 N 5832255 SULFURIC ACID, SOLUTION, 0.25 N 5831199 SULFURIC ACID, SOLUTION, 0.1 N 5831198 SULFURIC ACID, SOLUTION, 0.02 N 5832173 SULFURIC ACID, 37%, SOLUTION 5832911 SULFURIC ACID, SOLUTION, 20% W/V 5842157 SULFURIC ACID SOLUTION, 10% V/V 5842156 SULFURIC ACID SOLUTION, 5% V/V 5842160 TARTARIC ACID SOLUTION, 10% W/V 5862159 TARTARIC ACID SOLUTION, 2% W/V 5862432 TETRABUTYLAMMONIUM CHLORIDE, 1.0 M AQUEOUS 5911561 TETRABUTYLAMMONIUM HYDROXIDE, 0.05 M, AQUEOUS 5922436 TETRABUTYLAMMONIUM PHOSPHATE BUFFER, pH 7.5 5922357 N,N,N’,N’-TETRAETHYLETHYLENEDIAMINE 5952189 THORIN INDICATOR SOLUTION, 0.2% 6022163 TISAB II, SOLUTION, FOR FLUORIDE 6061281 TITRATION SOLVENT, ASTM D664, section 7.18 6081896 TITRATION SOLVENT, ACIDIC 6082790 TRIETHANOLAMINE, 0.2 N, AQUEOUS SOLUTION 613176 TRISHYDROXYMETHYLAMINOMETHANE, PRIMARY STANDARD 6222168 WATER HARDNESS BUFFER SOLUTION, WITH NO ADDED MAGNESIUM 6282167 WATER HARDNESS BUFFER SOLUTION, WITH MAGNESIUM EDTA 6282169 WIJS SOLUTION 6291209 ZINC SULFATE SOLUTION, 5% 638
ANALYTICAL REAGENTS & SOLUTIONSITEM # DESCRIPTION PAGE #
HPLC and Analytical Grade Quats As a chemical manufacturerserving analytical labs world-wide, the addition of productlines targeted directly to thatmarket is one of our top prior-ities. Hundreds of GFS prod-ucts fit this product profile,and two groups deserve spe-cial mention: ultrapure (99.99to 99.9999%) materials andstandard solutions, (for exam-ples, see pp. 96-97) andQuaternary Ammonium saltsand solutions (QUATS).
GFS has a long history withQUATS; our production oftetraalkylammonium perchlo-rates reflects the company’sdominant market position inperchloric acid and inorganicperchlorate salts. The GFSQUAT line now includesElectrometric and AnalyticalReagent Grade (EARG) prod-ucts.
The EARG line of high purityQUATS have characteristicproperties that are of particu-lar interest to chemists andtechnicians dealing with
processes and protocols thathave stringent purity require-ments; this includes suitabili-ty for use as polarographicelectrolytes and/or HPLCapplications. Both methanolicand aqueous hydroxide solu-tions feature: • very high alkalinity• very low chloride• virtual freedom from alkali
metal impurities• low ash
The EARG line fully comple-ments the traditional GFSQUAT line, which has foundwidespread industrial andcommercial use. Some key
examples and broader appli-cations include:• Bu4NOH (TBA hydroxide) -
supporting electrolyte;phase-transfer catalyst;titrant
• Bu4N(H2PO4) (TBA phos-phate) - ion-pair chromatog-raphy; buffering medium
• Me4NCl (TMA chloride) -USP/NF polarographic testreagent; catalyst; inhibitor
• Me4NOH (TMA hydroxide) - synthetic intermediate; precipitant; etchant; catalyst
• Et4NPF6 (TEA hexafluo-rophosphate) - fluoridingagent; biocide precursor
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Many other products areavailable in various purities,and we make custom formula-tions on a regular basis.
The chemical literaturereflects a broad and ongoinginterest in QUATS, includingthe perchlorate salts. Electro-analytical studies of tetraethylammonium perchlo-rate solutions have elucidatedthe nature of cation adsorp-tion at mercury electrodes.1A wide range of tetrabutyl-ammonium perchlorate solu-tions have been examined forconductometric and dielectricbehavior.2 Electronic conduc-tion has also been used tostudy the behavior of thenitrobenzene anion radical inthe presence of tetrabutylam-monium perchlorate in solidnitrobenzene.3
In the final analysis, it’s allpart of the greater productselection and personal servicethat you’ve come to expectfrom GFS.
1. Journal of ElectroanalyticalChemistry 1989, vol.270 pp. 381-393.2. Acta Chemica Scandanavia 1989,vol.43, pp. 103-115.3. Bulletin of the Chemical Society ofJapan 1989, vol.62, pp. 3413-3416. A
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2717 ALIQUAT 175 1673557 CETYLTRIMETHYLAMMONIUM BROMIDE, 98% 2482515 TETRABUTYLAMMONIUM ACETATE, 1 MOLAR, AQUEOUS 5902516 TETRABUTYLAMMONIUM BOROHYDRIDE, 98% 590353 TETRABUTYLAMMONIUM BROMIDE, REAGENT (ACS) 5902462 TETRABUTYLAMMONIUM CHLORIDE, HYDRATE, 98% 5912432 TETRABUTYLAMMONIUM CHLORIDE, 1.0 M AQUEOUS 5912433 TETRABUTYLAMMONIUM DIHYDROGEN PHOSPHATE 5915147 TETRABUTYLAMMONIUM FLUORIDE, HYDRATE, 98% 5912435 TETRABUTYLAMMONIUM HEXAFLUOROPHOSPHATE 5912517 TETRABUTYLAMMONIUM HYDROGEN SULFATE 5911202 TETRABUTYLAMMONIUM HYDROXIDE, 1.0 M, REAGENT (ACS), AQUEOUS 5912262 TETRABUTYLAMMONIUM HYDROXIDE, 0.4 M AQUEOUS, ELECTROMETRIC GRADE 5912444 TETRABUTYLAMMONIUM HYDROXIDE, 1.0 M IN METHYL ALCOHOL 5923575 TETRABUTYLAMMONIUM HYDROXIDE, 55% AQUEOUS 5922984 TETRABUTYLAMMONIUM HYDROXIDE, 40% AQUEOUS SOLUTION 592225 TETRABUTYLAMMONIUM IODIDE, REAGENT 592394 TETRABUTYLAMMONIUM PERCHLORATE, REAGENT 5922436 TETRABUTYLAMMONIUM PHOSPHATE BUFFER, pH 7.5 5922434 TETRABUTYLAMMONIUM TETRAFLUOROBORATE 5922518 TETRABUTYLAMMONIUM TRIFLUOROMETHANESULFONATE 5932519 TETRAETHYLAMMONIUM ACETATE, 50%, AQUEOUS SOLUTION 5941513 TETRAETHYLAMMONIUM BROMIDE 5941514 TETRAETHYLAMMONIUM CHLORIDE, MONOHYDRATE, 98% 5942438 TETRAETHYLAMMONIUM HEXAFLUOROPHOSPHATE 5942439 TETRAETHYLAMMONIUM HYDROXIDE, 1.0M 5952520 TETRAETHYLAMMONIUM HYDROXIDE, 20%, AQUEOUS SOLUTION 5952440 TETRAETHYLAMMONIUM IODIDE 5952522 TETRAETHYLAMMONIUM NITRATE, 35%, AQUEOUS 595511 TETRAETHYLAMMONIUM PERCHLORATE 5952437 TETRAETHYLAMMONIUM TETRAFLUOROBORATE 595366 TETRAHEXYLAMMONIUM IODIDE, REAGENT 596512 TETRAHEXYLAMMONIUM PERCHLORATE 5963779 TETRAKIS(TETRABUTYLAMMONIUM) ETHYLENEDIAMINETETRAACETATE, 50% SOLUTION 3593780 TETRAKIS(TETRAMETHYLAMMONIUM) ETHYLENEDIAMINETETRAACETATE, 30% SOLUTION 5971515 TETRAMETHYLAMMONIUM BROMIDE, REAGENT (ACS) 5981516 TETRAMETHYLAMMONIUM CHLORIDE 5982726 TETRAMETHYLAMMONIUM FLUORIDE, TETRAHYDRATE, 98% 5982442 TETRAMETHYLAMMONIUM HEXAFLUOROPHOSPHATE 5982524 TETRAMETHYLAMMONIUM HYDROGEN PHTHALATE, 99% 5981680 TETRAMETHYLAMMONIUM HYDROXIDE, PENTAHYDRATE 5982275 TETRAMETHYLAMMONIUM HYDROXIDE, SOLUTION, 1.0 Mol/L in WATER, REAGENT (ACS) 5981204 TETRAMETHYLAMMONIUM HYDROXIDE, SOLUTION, 25% in WATER 5982523 TETRAMETHYLAMMONIUM HYDROXIDE, SOLUTION, 25% in METHANOL 5992443 TETRAMETHYLAMMONIUM IODIDE 599510 TETRAMETHYLAMMONIUM PERCHLORATE 5992525 TETRAMETHYLAMMONIUM SILICATE, 18%, AQUEOUS SOLUTION 5992441 TETRAMETHYLAMMONIUM TETRAFLUOROBORATE 5992526 TETRAPROPYLAMMONIUM BROMIDE, 98% 6002527 TETRAPROPYLAMMONIUM CHLORIDE, 98% 6003500 TETRAPROPYLAMMONIUM HEXAFLUOROPHOSPHATE 6002528 TETRAPROPYLAMMONIUM HYDROXIDE, 1 M, AQUEOUS SOLUTION 600
QUATS INDEXITEM # DESCRIPTION PAGE #
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