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Certificate #3336.012 3
ContentsWhy GFS• Manufacturing Fine Chemicals Since 1928• Over 8,000 items• Custom Chemical Solutions & Mixtures• Custom Packaging Configurations - Zero Net Waste• Private Labeling & Kit Assembly• Customer Inventory Management• Manufacturer Direct Savings• Volume Purchase Discount Program• Association/Consortium Group Discounts• Recyclable Bottle Return Rebate Ask your sales rep for details• Free Sample Program: Ask your sales rep for details• Committed to Quality & Lot-to-Lot Consistency
GFS Chemicals, Inc.800 Kaderly DriveColumbus, OH 43228www.gfschemicals.com
Contact us for Complete Specifications, Availability/Delivery, or to Place an Order:Call 800-369-5524
Why GFS? 2Table of Contents 3Coulometric Selection Guide 4-5Coulometric Reagents 6-7Watermark Range Performance 8-9Volumetric Selection Guide 10-11One-component Reagents 12KF Selection Guide 13Two-component Reagents 14-15Watermark Reference material 16-17White Paper-Water Determination 18-20Sodium Bipehenyl (OHR) 21OHR Procedures 22OHR Pack & Ship 23GFS Reagents 23Analytical Specialties 24-25Certifications 26Warranties 27
Selection GuideCoulometricAnolytes
Catholytes
Diaphragm
Coulometric
Diaphragmless
1612 General Use1619 Ketones/ Aldehydes1607 Non-Polar Oil1889 Oven Reagent5202 Crude Oil1622 Pyridine
1813 Pyridine Free Generator Solution2321 Universal1623 Pyridine
1671 Fritless Reagent1889 Oven Reagent
1612
1619
1607
5202
1622
1889
1671
Ketones/Aldehydes
Biodiesel/Non-Polar/Oil
Universal Crude OilAnalysis
General Use/General Solutions (Pyridine-based)
KF Oven/Solid Samples
Fritless Reagent
General Use Alchohol (short) 1613 & 2321
2321
2321
2321/1613
1623
Usually Fritless,2321
Can be used in fritted system with 2321
4 5
Application Suggested PairingReagent
Watermark® Coulometric Reagent Selection Guide
6 7
Watermark® Coulometric Reagents
Known for its highly effective micro-determinations and automation, it’s obvious why coulometric titration has found popular application in the KF determination of water. Watermark Karl Fischer Reagents are designed for use with most coulometric systems on the market. They are specially formulated to provide the ultimate in analytical performance.
Advantages of Watermark Coulometric Titration: • Lowest increment of detection (50x lower than volumetric)• Ideal for small samples (<10 mg water) • Auto-adjusts as the material reacts with water vapor in the air• High accuracy
Watermark 1671 Fritless ReagentThe Watermark 1671 Fritless Reagent is both versatile and easy to use. Designed for use with fritless cells, Watermark 1671 can also be used with titrators that contain diaphragms or ceramic frits.
• Convenience of a single solution• Accurate and reproducible results• Fast pre-titration times• Free of chlorinated hydrocarbons• Suitable for all titrators and titration cell types
Watermark Coulometric Generator Solutions (Catholyte) GFS 1613 - Catholyte, General Use ReagentSize: Package: Product #:125 mL Ampoule 99781 GFS 2321- Catholyte, Universal Size: Package: Product #:125 mL Ampoule 99711
Coulometric Reagent Kits GFS 5605 - Coulometric Oils KitSize: Product #:8 x 100 mL Item 5202 121648 x 5 mL Item 2321 99711
GFS 1611 - Coulometric Reagent KitSize: Product #:1 L Item 1612 99771125 mL Item 1613 9978125 mL Item 1614 997931 funnel 7805
Watermark Coulometric Vessel Solutions (Anolyte)
GFS 1612 - Anolyte, General Use ReagentSize: Package: Product #:1 L Amber Bottle 99771
GFS 1619 - Anolyte, Ketones/AldehydesSize: Package: Product #:500 mL Amber Bottle 99813
GFS 1607 - Anolyte, CFC Free, OilsSize: Package: Product #:1 L Amber Bottle 99681
GFS 1889 - Anolyte, KF Oven ReagentSize: Package: Product #:1 L Amber Bottle 19183
GFS 5202 - Anolyte, Crude Oil AnalysisSize: Package: Product #:1 L Amber Bottle 12164
Watermark Coulometric Diaphragmless Reagent GFS 1671 - Fritless ReagentSize: Package: Product #:1 L Amber Bottle 99851
Pe rformance
0
0.2
0.4
0.6
0.8
1
1.2
0 0.2 0.4 0.6 0.8 1 1.2
Water Con
tent (%
) -‐ Sim
ilar R
eagent
Water Content (%) -‐ item 1616
8 9
Watermark® Coulometric Range: Performance
Watermark Coulometric reagents offer the best value and performance for Karl Fischer titration on the market today. With extended shelf life, rapid moisture determinations, and a stable end point, it’s easy to see why we outperform the competition. Our custom anolyte and catholyte solutions allow for faster and more accurate titrations than ever before, even when determining moisture content at microgram levels.
Coulometric TitrationWatermark Karl Fischer Coulometric Reagents were tested against competitor’s products using the same Karl Fischer coulometer set-up with identical parameters. The results clearly show Watermark coulomet-ric reagents perform faster titrations and have identical, stable endpoints when compared to the competition.
Watermark® Volumetric Range: Performance
Watermark Karl Fischer volumetric reagents were evaluated against the competitor’s products using the same volumetric titrator with identical instrument parameters. Compared to the competition, Watermark volumetric reagents showed faster titration speeds, stable end points and equivalent water recovery. Water RecoveryWatermark water content measurements are the same when com-pared to competitor reagents.
Volumetric TitrationWatermark reagents have a swift titration speed and nearly identical stable endpoints when compared to similar competitor reagents.
Watermark 1616 vs. Equivalent Competitor Reagent Water Standards at Different Percentages
Watermark 1616 vs. Equivalent Competitor Reagent Titration of Methanol
Watermark 1612 & 2321 vs. Equivalent Competitor Reagents Titration of Methanol
S election GuideVolumetricTitrant
Solvent
One-ComponentReagents
Volumetric
1600 - Single Solution, 5 mg/mL 1601 - Single Solution, 2 mg/mL 1616 - Methanol Based Titer, 5 mg/mL1893 - 5 mg/mL non-hazardous formulation 1894 - 2 mg/mL non-hazardous formulation
Two-ComponentReagents
Two-ComponentTitrants
Two-ComponentSolvents
Two-ComponentBuffers
1610 - General Purpose Solvent 1609 - Methanol Free Solvent 5322 - Solvent, Keytones/Aldehydes2978 - Solvents, Oils 3569 - Methyl Alcohol - KF Grade 2991 - KF Solvent for Oil
1604 - Non-hygroscopic Titrant, 5 mg/mL 1603 - Non-hygroscopic Titrant, 2 mg/mL 1602 - Non-hygroscopic Titrant, 1 mg/mL 1670 - Non-hygroscopic Titrant, 0.5 mg/mL
1610 - General Purpose Solvent 1609 - Methanol Free Solvent
1615 - Buffer
10 11
Volumetric Reagent Compatibility Guide
Watermark® Volumetric Reagent Selection Guide
X X X X X X X X XX X X X X X X XX X X XX X X XX X X X
X X X X
1600
- Sing
le So
lution
5 mg/m
L
1601
- Sing
le So
lution
2 mg/m
L
1616
- Meth
anol
Base
d tite
r
1893
- 5 m
g/mL n
on ha
zardo
us so
lution
1894
- 2 m
g/mL n
on ha
zardo
us so
lution
1604
- 5 m
g/mL n
on-hy
grosco
pic tit
rant
1605
- 2 m
g/mL n
on-hy
grosco
pic tit
rant
1602
- 1 m
g/mL n
on-hy
grosco
pic tit
rant
1970
- 0.5
mg/mL n
on-hy
grosco
pic tit
rant
Sample TypeGeneral purposeGeneral purpose (samples less soluble in methanol)Samples containing Aldehydes or KetonesFat / Lipid analysisShort chained alcoholsPetrochemical analysis
Solvent1610 - General purpose1609 - Methanol free solvent5322 - Solvent, ketones/aldehydes2978 - Solvent, oils - fatty3569 - Methyl alchohol, KF2991 - Solvent, oils - petro
Compa
tible
Reag
ent
Note: Lightened X represents example combination
Karl Fischer
12 13
Watermark® One-ComponentVolumetric Reagents
In one-component volumetric Karl Fischer Titration, a known concentra-tion of iodine rich titer (Reagent) is added to the vessel solution (Solvent) to consume the water in the sample. By measuring the volume of the titer added, we can calculate the amount of water in the sample. In this method, the titrant contains all the ingredients required by the KF reaction: iodine, base, sulfur dioxide, and an alcohol. The Watermark range includes titrants with titer values of 2 and 5 mg/mL of water in order to cover an array of applications.
Advantages of One-Component Watermark Titration:
• Extremely high water capacity • Fast and stable endpoints • Long shelf life• Convenient and simple to use• All KF components in one bottle
Watermark One-Component Titrants
The Watermark brand offers users a wide range of options for selecting the correct titrant. Thanks to their methanol-free formulation, most GFS KF volumetric titrants can be used for the determination of water in aldehydes and ketones. GFS 1616 is also available when a methanolbased titer is required.
Watermark 1609 - Methanol-Free Solvent
Due to interfering side reactions caused by ketones and aldehydes, solvents with methanol cannot always be used in KF titrations. Watermark 1600 and 1601 are formulated to work with 1609, a specially designed methanol-free solvent, in lieu of standard methanol, to quickly find moisture in ketones. Methanol-free solvents allow for faster titration times as well as being less hazardous than conventional methanol based solvents.
One-Component TitrantsGFS 1600 - Single Solution, 5 mg/mLSize: Package: Product #:1 L Amber Bottle 99601
GFS 1601 - Single Solution, 2 mg/mLSize: Package: Product #:1 L Amber Bottle 99621
GFS 1616 - Methanol Based Titer, 5 mg/mLSize: Package: Product #:1 L Amber Bottle 99821
GFS 1893 - 2 mg/mL Non-HazardousSize: Package: Product #:1 L Amber Bottle 17301
GFS 1894 - 5 mg/mL Non-HazardousSize: Package: Product #:1 L Amber Bottle 17311
Watermark® Solvents GFS 1610 - General Purpose SolventSize: Package: Product #:1 L Amber Bottle 99741
GFS 1609 - Methanol Free SolventSize: Package: Product #:1 L Amber Bottle 99721
GFS 5322 - Solvent, Ketones I AldehydesSize: Package: Product #:1 L Amber Bottle 15172
GFS 2978 - Solvent, OilsSize: Package: Product #:1 L Amber Bottle 28742
GFS 3569 - Methyl Alcohol - KF GradeSize: Package: Product #:1 L Amber Bottle 50361
14 15
VolumetricWatermark® Two-ComponentVolumetric Reagents
For users who do frequent KF analysis and need a higher degree of accuracy than one-component volumetric titration can provide, two-com-ponent volumetric titration is the solution. The major differentiating factor between the two methods is that the components of the KF reaction are separated in two-component titration as opposed to being in the same bottle for one-component volumetric titration.
Advantages of Two-Component Watermark Titration:• Eliminates frequent standardizations• Exact and stable titer strength• Faster titrations• Longer shelf life• Greater accuracy for low water content• Higher buffer capacity
Watermark 1610 - General Purpose SolventWatermark 1610 is GFS’ most versatile solvent. Formulated to work with any Watermark titrant, 1610 is the choice for all applications excluding aldehyde and ketone analysis. When aldehydes or ketones are present, Watermark 1609 should be used as a methanol-free alternative.
Watermark Non-Hygroscopic TitrantsWatermark non-hygroscopic titrants are designed to be exceptionally stable with a guaranteed shelf life of 2 years. The Watermark line also offers the titrant with the lowest titer strength on the KF market: 0.5 mg/mL for samples of very low water content - perfect for labs that don’t have a coulometric titra-tor. Our products maintain a titer strength of +/- 0.05 mg/mL, making them the most advanced and stable KF reagents available.
Watermark non-hygroscopic titrants can be used with both methanol-based and methanol-free solvents (1609/1610). This allows for faster titrationsas there is no need to change the titrant and clean the burette when switching to aldehyde and ketone analysis. Another key advantage of Watermark non- hygroscopic reagents is less frequent standardizations, providing users with increased accuracy.
Two-Component Volumetric Titrants
GFS 1604 - Non-Hygroscopic Titrant, 5 mg/mLSize: Package: Product #:1 L Amber Bottle 99661
GFS 1603 - Non-Hygroscopic Titrant, 2 mg/mLSize: Package: Product #:1 L Amber Bottle 99651
GFS 1602 - Non-Hygroscopic Titrant, 1 mg/mLSize: Package: Product #:1 L Amber Bottle 99641
GFS 1970 - Non-Hygroscopic Titrant, 0.5 mg/mLSize: Package: Product #:1 L Amber Bottle 99691
Two-Component Volumetric Solvents GFS 1610 - General Purpose SolventSize: Package: Product #:1 L Amber Bottle 99741
GFS 1609 - Methanol Free SolventSize: Package: Product #:1 L Amber Bottle 99721
GFS 2991 - Solvent,OilsSize: Package: Product #:1 L Amber Bottle 28772
Two-Component Volumetric Buffer GFS 1615 - BufferSize: Package: Product #:1 L Amber Bottle 99801
Reference
Volumetric Reference MaterialsGFS 1617 -‐ 5.00 mg / mL GFS 1618 -‐ 1.00 mg / mL GFS 2196 -‐ 0.10 mg / mLGravimetric Reference MaterialsGFS 2303 -‐ 10 mg / gGFS 2304 -‐ 5.00 mg / g GFS 2302 -‐ 1.00 mg / gGFS 2301 -‐ 0.100 mg / gGFS 3493 -‐ 0.50 mg / gGFS 2311 -‐ 0.050 mg / gGFS 805 -‐ Sodium Tartrate, 15.61-‐15.71%GFS 2385 -‐ Potassium Citrate, 5.50-‐5.60%
16 17
Watermark® Reference Materials
Standardization of a KF reagent is necessary in order to determine its water equivalency. GFS is the primary manufacturer of a broad range of reference materials, all made in-house at our Columbus, Ohio facilities. The (liquid) water standards are delivered in boxes of 10single-use ampoules with a shelf life of over 5 years. Watermark water standards are methanol-free and can be used for all applications. All standards come with a certificate of analysis.
Custom reference materials can also be made for applications requiring other levels of water content.
Advantages of Watermark Reference Materials:
• Manufactured according to ISO 9001:2008• ISO 17025 Accreditation available soon• Single-use ampoules• Volumetric and Gravimetric standards available
Volumetric vs. GravimetricReference Materials:
GFS is proud to offer both volumetric and gravimetric water standards to be used in KF titration. These water standards are available by weight (w/w - known weight of water per gram of standard solution) or by volume (w/v - known weight of water by volume of standard solution). Whenever possible, we recommend using water standards by weight. Use of an analytical balance will allow measurement of such standards with a precision of (±) 0.0002 grams.
Watermark reference materials come in single-use 5 mL ampoules and are injected via syringe into the titration cell.
GFS Chemicals, Inc. Columbus, Ohio. Made in the U.S.A. Watermark®
is a registered trademark of GFS Chemicals. www.gfschemicals.com
PaperWhite
18 19
Water Determination in an Insecticide
IntroductionWater determination in powders can be performed through coulometric or volumetric Karl Fischer titration. Some of these materials do not dissolve in any of the common solvents used for Karl Fischer (KF) titration (i.e. methanol, 2-methoxyethanol, ethanol, etc.). Because powder materials can clog the frit of a coulometric KF unit, or because the user does not have access to this equipment, alternate methods must be found.
Anon-hygroscopic volumetric titrant of low titer strength (0.5 mg/mL (+/- 0.05 mg/mL) is specially designed for volumetric titrations of samples with low moisture content. This application note demonstrates use of the reagent and its efficacy for the determination of water.
The following equipment and reagents were used. Instrumentation: model DL38 volumetric titrator (Mettler-Toledo, Greifensee, Switzerland). Reagents: item #1970, non-hygroscopic titrant, 0.5 mg/mL; item #1610, general purpose solvent, methanol-based; item #2302, water standard, 1.00 mg/g; and item #1604, non-hygroscopic titrant, 5 mg/mL. All reagents were from GFS Chemicals,Inc. (Powell, OH).
ProcedureThe solvent was changed after each determination. Because the titrant is of very low strength (0.5 mg/mL), pre-titration was accelerated by adding item #1604 (5 mg/mL titrant) to the cell using a syringe. Addition of the titrant ceased when the drift of the titrator decreased to approximately 100 microgram per milliliter. The following parameters were used in the DL38 titrator method – current (microampere): 20; endpoint (mV): 100; dV min(microliter): 3.0; dV max (microliter): 8.0;dV max factor (%): 40; drift stop: relative drift (microgram per minute): 50.
Titer determination was performed by using a 1.00 mg/g water standard. The standard was first checked by coulometric titration at 0.99 mg/g.
Results for the titer determination (three titrations) are as follows: Concentration: 0.473 mg/mL; standard deviation: 0.005 mg/mL; relative standard deviation: 0.96%.
Determination of the water in the insecticideThe water content of this insecticide was known to be fairly low, and this powder is not soluble in methanol. To check method validity and to obtain better accuracy, water determination was performed by spiking samples with various known amounts of water (from item #2302). The same method as that used for the titer determination was used, but this time with a stir time of 60 sec. When spiking the sample, the known amount of water standard was added to the vessel during the stirring time, after addition of the sample. The results are shown in Table 1.
Table 1Titration results: Four samples spiked with various amounts of water
1 0.530 0.000 1.501 1.332 0.585 0.850 3.576 2.873 0.570 0.505 2.873 2.37 4 0.600 0.250 2.518 1.97
Experiment Sample Water Titration Amt of water titratedNo. size (g) Spike (mg) volume (mL) per gram of sample (mg/g)
OHR
20 21
Sodium Biphenyl: the Problem Solving Reagent
Statement of the Problem Quantitative isolation of organically-bonded halide as a prerequisite for classical potentiometric determination requires extraction of the halide from an organic medium into a water-soluble ionic form. The GFS Organic Halogen Reagent (Item# 5005) does this effectively and rapidly for samples that can be dissolved in an inert solvent, such as toluene or ether. (see www.gfschemicals.com for literature references)
Reagent CharacteristicsGFS Organic Halogen Reagent is a viscous, dark blue solution of sodium biphenyl complex in diethylene glycol diethyl ether (ethyl diglyme). The product has a limited shelf life, losing strength during storage at a rate of about 3 -10% per month. Packages are marked with a projected expiration date, although the reagent may be used as long as it continues to give a dark blue, black, or green color when added to the sample. It is possible to compensate for diminished strength by increasing the amount of reagent used.
GFS schedules the production of OHR (Organic Halogen Reagent) according to anticipated customer use; we provide single-lot shipments of larger orders whenever possible. The reagent should be stored in a cool place but not refrigerated. Cold storage, which may include shipping during winter months, can result in partial crystallization of the reagent that can then adhere to the surface of the plastic bottles in which it is pack aged. Usually this condition can be detected by careful observation and solid materials often can be re-dissolved by carefully shaking the bottle after it has been warmed to room temperature or slightly above. Instructions on the use and disposal of the reagent accompanies each package shipped.
The water titrated in each sample, per gram of sample, is proportional to the known amount of water added. Therefore, the intercept of the graph in Figure 1 (water titrated per gram of sample vs.water added) is the amount of water initially present in the sample, per gram of sample.
The following parameters can be calculated. Equation: Y = 1.5704 X + 1.5549; regression parameter: R2=0.998. Y is the water titrated (in mg) per gram of sample, and R is the correlation coefficient. The R2 value (close to 1) indicates the efficiency and validity of the method. Water in the sample can be estimated to be 1.555 mg/g.
Originally published in American Laboratory News, March, 2004 and submitted by Jerome P. Bozon, GFSChemicals,Inc.
OHR
22 23
Packaging and Shipping The proper DOT shipping name: Combustible liquid, n.o.s.; normal shipment is via common carrier - ground, air shipments possible upon request. Package units consist of 20 x 15 mL plastic vials per box. Teflon liners are not to be used in the storage or packaging of OHR. The entire contents of a vial should be used in any analytical procedure in order to minimize deterioration of the product by exposure to air and moisture.
Typical ProcedureMeasure sample into a clean, dry separatory funnel. Dissolve solid or small samples in a halogen-free, anhydrous inert solvent such as toluene, ethyl diglyme, or THF. Empty one vial of OHR into the funnel, reseal, and mix. Retention of the dark blue, black, or green color indicates sufficient active reagent is present. If the color quickly fades, add additional OHR. After two minutes, extract with water or dilute nitric acid. The extracted halides, now completely converted to ionic forms, can be determined by conventional analytical methods.
AdvantagesRapid - analysis can usually be made in 30 minutes or less. Safe/Convenient - avoids hazard and difficulty of preparing sodium biphenyl in the laboratory. No need for combustion apparatus or pressure vessels.Versatile - applicable to a wide range of organic materials: pesticides, hydrocarbons, polymers, medicines, sol vents, naphtha and petrol, etc. Works with solids, liquids, and gases.Low Blanks - engineered for the production of low-halogen content OHR.Economical - saves time and eliminates the need for extraneous equipment.Wide-range - accommodates all halides, including fluoride, with either microgram traces or macro quantities.
Item#50052347234823462349
SKU ·5410174991729613378129991
Description Package Unit CommentOHR (Sodium Biphenyl Solution) 20 x 15 mL Multi-case discounts availableToluene (halogen 0.1 ppm max) 1 L Also available: 6x1 L, 4 L, 4x4 L Tetrahydrofuran (halogen 0.1 ppm max) 1 L Also available: 6x1 L, 4 L, 4x4 LEthyl DigIyme (halogen 0.1’ppm max) 1 L Also available: 6x1 L, 4 L, 4x4 LColorimetric Chloride reagent set consists of:Ferric Nitrate Sol’n 20% Fe(NO3)3 500 mLMercuric Thiocyanate in CH3OH Hg(SCN)2 500 mL Save 10% when you buy the set!Chloride Standard,1000 ppm Chloride 100 mL
GFS Reagents for OHR Analysis
}
Analytical
Specialties24 25
Analytical LaboratoryChemicals
GFS manufactures over 8,000 organic, inorganic, and analytical chemicals all in a lean manufacturing operation. We have most chemicals needed for laboratory, bench, analytical, quality control, materials characterization, scientific or research work.
Our ultra-high-purity double-distilled Veritas® and ACS SuperiorTM brand acids and Watermark® brand reagents are used throughout the world. Our AMCO Clear® Water Analysis Division manufactures the most accurate water calibration standards available for water treatment plants around the globe.
• Watermark® Pyridine-Free Karl Fischer Reagents• Veritas® HPLC Solvents• HPLC/GC/UV-Vis Solvents• Reagent Grade Solvents• Spectroscopy Products• Primary Standard Salts• Normality Solutions• Colors and Indicators• Silver Compounds• Reagents for Water & Wastewater Labs• Organic Halogen Reagent OHR/ Halogen Level Field Test Kits• Mehlich Ill solution (and others) for soils analysis• Conductivity Standards and pH Buffers• AA and ICP Standard Solutions• Anion Standard Solutions• Standard Solutions for Trace Metal Analysis• ACS Reagents• ASTM Type I Deionized water • LC-MS Solvents• LC-MS Eluents
WarrantyCertifications26 27
Warranty Information
GFS products are not intended, approved or authorized for human or animal consumption nor for direct use in any food, drug or cosmetic applications. GFS products are warranted to meet our specifications as set forth in the GFS Lot Analysis or other Company literature specifically relating thereto only. By accepting GFS’ products, Customer agrees to the limitations set forth herein, assumes all responsibility for the proper use of such products in accordance with these limitations, and agrees to indemnify, defend and hold harmless GFS from and against any and all claims, suits and/or liability in the event such,products are used in a manner contrary to these limitations.
GFS HEREBY DISCLAIMS ANY AND ALL WARRANTIES, LIABILITY AND/OR RESPONSIBILITY IN CONNECTION WITH ANY USE OR APPLICATION OF ITS PRODUCTS IN A MANNER CONTRARY TO THE LIMITATIONS SET FORTH HEREIN AND/OR SOLD AS REPACKED COMPANY BRANDED MATERIALS TO THIRD PARTIES. ANY USE OR APPLICATION OF GFS PRODUCTS IN A MANNER CONTRARY TO THESE LIMITATIONS SHALL BE AT TlHE USER’S SOLE RISK, AND SHALL RELIEVE GFS OF ALL WAR-RANTIES, LIABILITY AND RESPONSIBILITY WITH RESPECT THERETO.
These limitations may not be modified, affected or superseded by Customer, nor by any language, term or provision contained in Customer’s purchase order, confirmation or other correspondence or communication.
ONLY AN OFFICER OF GFS CHEMICALS MAY ALTER GFS STANDARD TERMS AND CONDITIONS.RELIANCE ON CONTRADICTORY STATE-MENTS, WHETHER VERBAL OR WRITTEN, BY NON-AUTHORIZED GFS EMPLOYEES THAT WOULD ALTER THESE STANDARD GFS TERMS AND CONDITIONS IS STRICTLY PROHIBITED.
GFS Chemicals products will only be warranted if purchased directly from GFS Chemicals or through an authorized GFS Chemicals distributor.
GFS Chemicals, Inc. offers technical information and products for use by qual-ified technicians capable of understanding and communicating their respective hazards. Any recommendations or suggestions are made without warranty or guaranty of any kind. GFS assumes no responsibility connected with the use of our products or print information of any kind. In no case is the purchase of GFS products to be taken as a license to violate or infringe upon any patent.
Quality/Safety/Environment/150
As a long-standing member of the Society of Chemical Manufacturers & Affiliates (SOCMA) and the Ohio Chemistry Technology Council, GFS is committed to conducting our business with integrity and foresight.
In addition, GFS is committed to full implementation of the SOCMA ChemStewards® environmental, health, safety and security management system.
ChemStewardsGFS was founded on a business philosophy of community stewardship and respect for our environmental resources.
GFS is an ISO 9001-2008 certified companyWe guarantee our products meet the quality standards that we publish and we adhere to documented ISO procedures.
GFS is ISO/IEC 17025:2005 AccreditedThe American Association for Laboratory Accreditation (A2LA) has awarded GFS Chemicals with ISO/IEC 27025:2005 accreditation for the testing of the following product families:
• In-Spec line of UV/Vis Spectrophotometer Reference Standards• AMCO Clear line of EPA approved primary standard for calibration of turbidity sensors• pH Buffer Solutions• Conductivity Standards
CHEMICALS ®
Contact us for complete specifications, availability, delivery times, pricing, or to place an order.
To Order Call: or e-mail us via:(800) 369 - 5524 sales@foxscientific.com
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The Watermark® “Karl Fischer Book” is available at no charge and is written for all levels of technical expertise.
information on Watermark Karl Fischer products from reaction mechanisms through safety, solution preparation and standardization methods, applications and storage, and also eliminating interferences and water formation, and an extensive reference section.SKU# 99879
GFS Chemicals; Inc.800 Kaderly DriveColumbus, OH 43228
Serving Chemists Since 1928
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