GFS Chemicals Reagents

1. Specialty Chemical
Manufacturing Expertise
Since 1928
GFS Chemicals
Analytical Reagents
& Solutions
2006-2007 PRODUCT CATALOG

2. pH Reference
Buffers
and Primary
Standards
ANALYTICAL REAGENTS&SOLUTIONS
pH Reference Buffers used with confidence for all ucts but also new unit sizes,
GFS Chemicals’ pH Buffers are applications because stan- including bulk containers, and
manufactured from the finest dardization is performed case pricing. Certificates of
high-purity water and reagent using the most trusted instru- Analysis are provided with
grade chemicals. They are ments in the business – Orion, every shipment and include
standardized at 25°C against Beckman-Coulter, and Hanna, NIST Traceability.
NIST reference materials to a to name a few. For simplicity,
tolerance of 0.01 on Buffers all common buffers are the Primary Standards
4.00, 7.00, and 10.00 and to a same price regardless of pH Even with the automation of
tolerance of 0.02 on all other or if color coded. This catalog so many lab methods, it
buffer ranges. Our buffers are features not only new prod- remains essential to verify
analytical standard solutions.
For over 75 years, GFS
Chemicals has provided pri-
mary standards to support
analytical chemists worldwide
with traceability as well as the
confidence that their results
are accurate.
GFS continues to support
chemists performing such
titrations as acid-base, redox,
complexometric, and many
others. Following is a list of
many common primary stan-
dards manufactured by GFS.
Throughout the catalog, many
others are listed and we wel-
come inquiries for your
unique standards.

3. For acid-base: diphenylguani- involving the formation of
dine, constant boiling perchlo- complex ions.
ric acid, potassium acid
phthalate, potassium bi- Of several substances which
iodate, sulfamic acid, and can be used as standard solu-
tris-hydroxymethyl- tions in such analyses, sodi-
aminomethane. um ethylenediamine-
tetraacetate (EDTA) is one of
ANALYTICAL REAGENTS&SOLUTIONS
For redox titrimetry the fol- the most satisfactory in that it
lowing are listed as primary forms highly stable complex
standards: ceric ammonium ions with calcium, magnesium
nitrate, ferrous ethylenedi- and numerous other metals. A
ammonium sulfate, electrolyt- solution of disodium dihydro-
ic iron, potassium bi-iodate, gen ethylenediaminetetra-
potassium dichromate, and Find these items by name in acetate (pH 5.5) is usually
sodium oxalate. the alphabetical listing in this used as the standard solution.
catalog. For more information,
For complexation titrimetry request GFS Chemicals publi- The most common of such
(EDTA): calcium carbonate, cation No. 497, Standard titrations is the determination
disodium dihydrogen ethyl- Substances and Solutions (see of calcium and magnesium, as
enediaminetetraacetate dihy- page facing inside back cover). in analysis of waters for hard-
drate, and magnesium iodate ness, or of limestone. The
tetrahydrate. Complexometric end-point may be detected in
Titration Reagents various ways, the most com-
Other specially prepared pri- A spectacular advance in ana- mon utilizing the dyestuff
mary standards include sodi- lytical chemistry was the Eriochrome Black T. This
um chloride for argentimetric introduction of ethylenedi- dyestuff has the unique prop-
titrations; and cobalt sulfate aminetetraacetate as a stan- erty of itself forming a com-
for volumetric and colorimet- dard solution in titrations plex ion with magnesium. On
ric analyses. titration, the EDTA first unites
pH Values of Buffers at Various Temperatures
25 o 0o 5o 10 o 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 1.79
4.01 4.00 4.00 4.00 4.00 4.02 4.03 4.06 4.08 4.13 4.16 4.21
6.86 6.98 6.95 6.92 6.87 6.85 6.84 6.83 6.84 6.85 6.86 6.88
7.00 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 8.85
10.01 10.32 10.25 10.18 10.06 9.97 9.89 9.83 – – – –

4. with the calcium and metals with EDTA.
magnesium ions in
solution and then Three primary stan-
pulls the magnesium dard materials are
away from the available for titrimet-
dyestuff-magnesium ric work with EDTA.
complex resulting in a Ordinary reagent
color change from red grade calcium carbon-
ANALYTICAL REAGENTS&SOLUTIONS
to blue. The titration ate contains sufficient
is carried out at a pH magnesium to make it
of 10 and yields the unacceptable as a pri-
sum of the calcium mary standard but a
and the magnesium special, low-magne-
present. sium grade is avail-
able, Item# 337. About
Aqueous solutions of the only good
Eriochrome Black T primary standard
do not keep and magnesium
another indicator, Calmagite, tion of certain blue dyes, thy- compound is magnesium
was introduced for the EDTA molphthalein or bromthymol iodate tetrahydrate, described
titration of calcium plus mag- blue, gives a somewhat more in 1962 by Lindstrom and
nesium. The color change of satisfying color change at the Stevens; this material is avail-
Calmagite at the end-point is end-point. able as Item# 348. Disodium
also from red to blue but the Dihydrogen Ethylenediamine-
colors are clearer and the The end-point with Calcein tetraacetate Dihydrate, the
end-point sharper. Aqueous may be detected also by the reagent used to prepare EDTA
solutions of this indicator are disappearance of the fluores- solutions, is itself a good pri-
stable indefinitely. Carried out cence under ultraviolet illumi- mary standard when properly
under slightly different condi- nation of the calcium salt. prepared, item #365.
tions, pH 12, and with the Calcein is prepared by the
indicator Calcein, calcium action of formaldehyde and
alone may be determined in iminodiacetic acid on fluores-
the presence of even large cein. It is typical of a class of
amounts of magnesium. This indicators known at “metalflu-
procedure may be applied to orochromic” indicators.
the determination of calcium
in water and in limestone. Another indicator of this class
Calcein modified by the addi- is Calcein Blue
(ß-methyl-umbelliferonemeth-
ylene- iminodiacetic acid)
which is useful in the titration
of copper, cobalt and other

5. ANALYTICAL REAGENTS & SOLUTIONS
ITEM # DESCRIPTION PAGE #
2001 ACETATE BUFFER FOR CHLORINE (APHA) pH 4 161
1131 ACETIC ACID, SOLUTION, 1.0 N 163
2008 ACETIC ACID, SOLUTION, 0.5 N 163
2007 ACETIC ACID, SOLUTION, 0.10 N 163
2006 ACETIC ACID SOLUTION, 70% 163
2005 ACETIC ACID SOLUTION, 30% V/V 163
2004 ACETIC ACID SOLUTION, 20% V/V 163
ANALYTICAL REAGENTS&SOLUTIONS
2256 ACETIC ACID SOLUTION, 15% V/V 163
2003 ACETIC ACID SOLUTION, 12.5% (1+7) 164
2002 ACETIC ACID SOLUTION, 10% V/V 164
2009 ACID DIGESTION MIXTURE 166
2010 ACID SOLUTION FOR PHOSPHATE (APHA) 166
2285 AMMONIACAL BUFFER, pH 10, FOR EDTA TITRATIONS 176
2405 AMMONIUM ACETATE SOLUTION, 10%, AQUEOUS 177
2016 AMMONIUM BIFLUORIDE SOLUTION, 5%, AQUEOUS 177
2019 AMMONIUM CHLORIDE SOLUTION, 0.1 M 178
2018 AMMONIUM CHLORIDE SOLUTION, 8.5% W/V 178
2017 AMMONIUM CHLORIDE SOLUTION, 5% W/V 179
2020 AMMONIUM CHLORIDE-EDTA REAGENT SOLUTION 179
2021 AMMONIUM CITRATE SOLUTION, 54% (ASTM) 179
2022 AMMONIUM CITRATE-SODIUM BORATE SOLUTION, (ASTM FOR IRON) 179
3553 AMMONIUM HYDROXIDE SOLUTION, 1 N 183
1136 AMMONIUM HYDROXIDE SOLUTION, 10% V/V 183
2023 AMMONIUM HYDROXIDE SOLUTION, 5% V/V 183
1137 AMMONIUM MOLYBDATE SOLUTION, 10%, REAGENT 184
2024 AMMONIUM MOLYBDATE SOLUTION, 4% 184
1142 AMMONIUM MOLYBDATE, REAGENT #1 184
1141 AMMONIUM MOLYBDATE, REAGENT #2 184
2027 AMMONIUM OXALATE SOLUTION, 5% W/V 185
2029 AMMONIUM PHOSPHATE, DIBASIC, 30%, SOLUTION 186
2028 AMMONIUM PHOSPHATE, DIBASIC, 10%, SOLUTION 186
2030 AMMONIUM SULFATE SOLUTION, 1 M 187
2449 AMMONIUM SULFIDE, 20% AQUEOUS SOLUTION 188
1138 AMMONIUM THIOCYANATE SOLUTION, 0.1 N 189
2031 AMMONIUM THIOCYANATE SOLUTION, 10% W/V 189
2032 ANTIMONY POTASSIUM TARTRATE, SOLUTION 192
1860 BARIUM CHLORIDE SOLUTION, 1.0 N 196
1143 BARIUM CHLORIDE SOLUTION, 0.5 M (12%) 196
2034 BARIUM CHLORIDE SOLUTION, 0.1 M 196
2190 BARIUM CHLORIDE SOLUTION, 0.005 M 196
2033 BARIUM CHLORIDE SOLUTION, 10% W/V 196
5000 BARIUM PERCHLORATE, 0.01 N, AQUEOUS SOLUTION 198
2035 BENEDICT’S SOLUTION, QUANTITATIVE 201
1681 BENZOIC ACID, PRIMARY STANDARD 201
2037 BORATE BUFFER SOLUTION, pH 9.5 208
2039 BORIC ACID SOLUTION, 5% W/V 209
2387 BORIC ACID, 4% ABSORBANT 209
2038 BORIC ACID ABSORBANT SOLUTION, 2% 209
2041 BROMCRESOL PURPLE SOLUTION, 0.04% AQUEOUS 211
2340 BUFFER CONCENTRATE, pH 4.00 216
2335 BUFFER CONCENTRATE, pH 7.00 216
2341 BUFFER CONCENTRATE, pH 10.00 216
2549 BUFFER pH 4, 7, 10 KIT 216
2044 BUFFER SOLUTION FOR ZINC, pH 9 216
2325 BUFFER SOLUTION, pH 1.00 217
WE HONOR

6. ANALYTICAL REAGENTS & SOLUTIONS
ITEM # DESCRIPTION PAGE #
1631 BUFFER SOLUTION, pH 1.68 217
1632 BUFFER SOLUTION, pH 2.00 217
1633 BUFFER SOLUTION, pH 3.00 217
680 BUFFER SOLUTION, pH 4.00 217
1634 BUFFER SOLUTION, pH 4.00, (COLOR CODED RED) 217
1635 BUFFER SOLUTION, pH 5.00 217
1636 BUFFER SOLUTION, pH 5.50 217
ANALYTICAL REAGENTS&SOLUTIONS
1637 BUFFER SOLUTION, pH 6.00 218
1638 BUFFER SOLUTION, pH 6.86 218
681 BUFFER SOLUTION, pH 7.00 218
1639 BUFFER SOLUTION, pH 7.00, (COLOR CODED YELLOW) 218
1640 BUFFER SOLUTION, pH 7.00, (COLOR CODED GREEN) 218
1641 BUFFER SOLUTION, pH 7.38 218
1642 BUFFER SOLUTION, pH 8.00 218
1643 BUFFER SOLUTION, pH 9.00 218
1644 BUFFER SOLUTION, pH 9.18 219
682 BUFFER SOLUTION, pH 10.00 219
1645 BUFFER SOLUTION, pH 10.00, (COLOR CODED BLUE) 219
2548 BUFFER SOLUTION, pH 11.00 219
1646 BUFFER SOLUTION, pH 11.33 219
1647 BUFFER SOLUTION, pH 12.00 219
2176 BUFFER SOLUTION, pH 12.45 219
337 CALCIUM CARBONATE, PRIMARY STANDARD (ACS) 229
1148 CALCIUM CHLORIDE, SOLUTION, 2.75% 230
15 CERIC AMMONIUM NITRATE, CERTIFIED 238
14 CERIC AMMONIUM NITRATE, PRIMARY STANDARD 239
22 CERIC PERCHLORATE, SOLUTION, 0.5N 241
25 CERIC SULFATE, SOLUTION, 0.5N 241
1983 CERIC SULFATE SOLUTION, 0.4 N 241
716 CERIC SULFATE, SOLUTION, 0.2500N 241
26 CERIC SULFATE, SOLUTION, 0.1 N 242
519 CERIC SULFATE, SOLUTION, 0.0500N 242
1284 CERIC SULFATE, SOLUTION, 0.0179N 242
1991 CHLORIDE COLOR REAGENT, MERCURIC THIOCYANATE 0.06% SOLUTION 248
2349 CHLORIDE COLORIMETRIC ANALYSIS REAGENT SET 249
2048 CITRIC ACID SOLUTION, 10% W/V 260
2049 CITRIC BUFFER SOLUTION 260
2050 COBALT CHLORIDE, 1.2% SOLUTION, APHA for NITROGEN 262
2051 COLOR STANDARD SOLUTION, APHA 500 264
2381 CONDUCTIVITY STANDARD 25,000 uS/cm 265
3747 CONDUCTIVITY STANDARD, 12,880 uS/cm 265
2174 CONDUCTIVITY STANDARD 1413 uS/cm 265
686 COPPER, PRIMARY STANDARD REAGENT (ACS), SHOT 273
2054 CUPRIC SULFATE SOLUTION, 0.01 M 272
2053 CUPRIC SULFATE SOLUTION, 5% W/V 272
666 CUPRIETHYLENEDIAMINE SOLUTION, 1M 273
6661 CUPRIETHYLENEDIAMINE SOLUTION, 0.5M 273
2358 N,N’-DIETHYL-N,N’-bis(SULFOPROPYL)ETHYLENEDIAMINE, DESPEN 292
2359 N,N’-DIETHYLPIPERAZINE, DEPP 292
2060 DIMETHYLGLYOXIME SOLUTION, 1% IN ALCOHOL 300
136 DIPHENYLGUANIDINE, PRIMARY STANDARD 305
365 DISODIUM DIHYDROGEN ETHYLENEDIAMINETETRAACETATE DIHYDRATE,
PRIMARY STANDARD 308
720 DISODIUM DIHYDROGEN ETHYLENEDIAMINETETRAACETATE SOLUTION, 0.1M 308
1553 DISODIUM DIHYDROGEN ETHYLENEDIAMINETETRAACETATE SOLUTION, 0.0575M 308
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7. ANALYTICAL REAGENTS & SOLUTIONS
ITEM # DESCRIPTION PAGE #
1151 DISODIUM DIHYDROGEN ETHYLENEDIAMINETETRAACETATE SOLUTION, 0.05M 308
1152 DISODIUM DIHYDROGEN ETHYLENEDIAMINETETRAACETATE SOLUTION, 0.01M 308
1282 ELECTROLYTE SOLUTION 318
330 ETHYLENEGLYCOL-bis-(AMINOETHYLETHER)-TETRAACETIC ACID, REAGENT (EGTA) 325
2066 FERRIC CHLORIDE SOLUTION, 10% W/V 334
1157 FERRIC CHLORIDE SOLUTION, 0.025% 334
2069 FERRIC NITRATE SOLUTION, 40.4% in 8% Nitric Acid 335
ANALYTICAL REAGENTS&SOLUTIONS
2068 FERRIC NITRATE SOLUTION, 20% W/V 335
2067 FERRIC NITRATE SOLUTION, 5% in 2.5% Nitric Acid 335
41 FERROUS ETHYLENEDIAMMONIUM SULFATE, PRIMARY STANDARD 336
927 HEXAMETHYLENETETRAMINE, REAGENT (ACS) 356
2350 n-HEXANE-MTBE 80-20 MIXTURE 357
2171 HYDROCHLORIC ACID, SOLUTION 6.0 N 366
1572 HYDROCHLORIC ACID, SOLUTION, 2 N 366
382 HYDROCHLORIC ACID, SOLUTION, 1.0 N 366
1162 HYDROCHLORIC ACID, SOLUTION, 0.5 N 367
2330 HYDROCHLORIC ACID, SOLUTION, 0.2 N 367
722 HYDROCHLORIC ACID, SOLUTION, 0.1 N 367
2071 HYDROCHLORIC ACID, SOLUTION, 0.05 N 367
2535 HYDROCHLORIC ACID, SOLUTION, 0.02 N 367
1161 HYDROCHLORIC ACID, SOLUTION, 0.01 N 367
3578 HYDROCHLORIC ACID, 0.1 N, in ISOPROPYL ALCOHOL 367
2305 HYDROCHLORIC ACID, 10% V/V, 1 + 9 367
3790 HYDROGEN PEROXIDE, 50% SOLUTION 368
932 HYDROGEN PEROXIDE, 30%, REAGENT (ACS) 369
9321 HYDROGEN PEROXIDE SOLUTION, 3% 369
771 HYDROXYETHYLETHYLENEDIAMINETRIACETIC ACID, TRISODIUM SALT, REAGENT 370
2072 HYDROXYLAMMONIUM CHLORIDE SOLUTION, 50% AQUEOUS W/V 371
1543 HYDROXYLAMMONIUM CHLORIDE SOLUTION, 20% AQUEOUS 371
1083 HYDROXYLAMMONIUM CHLORIDE SOLUTION, 10% AQUEOUS 371
2074 IODINE, TINCTURE 379
1163 IODINE, SOLUTION, 1 N 378
2073 IODINE, SOLUTION, 0.5 N 378
1164 IODINE, SOLUTION, 0.1 N 379
226 IRON, ELECTROLYTIC, PRIMARY STANDARD 382
1591 LANTHANUM CHLORIDE, SOLUTION, 10% 392
2075 LEAD ACETATE, 10% SOLUTION 395
2076 LEAD PERCHLORATE SOLUTION, 0.1 M 397
348 MAGNESIUM IODATE, TETRAHYDRATE, PRIMARY STANDARD 410
1168 MAGNESIUM SULFATE SOLUTION 2.25% 413
2078 MANGANESE SULFATE, SOLUTION 416
2079 MERCURIC CHLORIDE SOLUTION, 1% 418
2080 MERCURIC NITRATE SOLUTION, 0.1 N 418
1858 MERCURIC SULFATE SOLUTION 419
2338 MERCURIC SULFATE SOLUTION, FOR DIGESTION 419
2352 MERCURIC THIOCYANATE, SOLUTION, 0.48% in METHYL ALCOHOL 419
2365 4-(N-MORPHOLINO)BUTANESULFONIC ACID, MOBS 438
2364 2-(N-MORPHOLINO)ETHANESULFONIC ACID, MES 438
2363 3-(N-MORPHOLINO)PROPANESULFONIC ACID, MOPS 438
969 NESSLER REAGENT, Mercuric Potassium Iodide, Solution 445
1176 NITRIC ACID, SOLUTION, 1.0 N 451
2257 NITRIC ACID SOLUTION, 0.5 N 452
1175 NITRIC ACID, SOLUTION, 0.1 N 452
1278 NITRIC ACID, SOLUTION, 15% W/W 452
1280 NITRIC ACID, SOLUTION, 10% W/W 452
WE HONOR

8. ANALYTICAL REAGENTS & SOLUTIONS
ITEM # DESCRIPTION PAGE #
2089 o-NITROPHENOL SOLUTION, 0.3% AQUEOUS 454
2087 m-NITROPHENOL SOLUTION, 0.1% AQUEOUS 454
2088 m-NITROPHENOL INDICATOR SOLUTION, 1% IN ETHANOL 454
2090 p-NITROPHENOL SOLUTION, 0.1% AQUEOUS 454
64 OSMIUM TETROXIDE, SOLUTION, 0.01 M in 0.1 M sulfuric acid 465
2092 OXALIC ACID SOLUTION, 0.1 N 466
2091 OXALIC ACID SOLUTION, 10% W/V 466
ANALYTICAL REAGENTS&SOLUTIONS
1677 PERCHLORIC ACID SOLUTION, 0.1 N, AQUEOUS 476
71 PERCHLORIC ACID SOLUTION, 0.1 N IN ACETIC ACID 476
2963 PHENOLDISULFONIC ACID, SOLUTION 478
726 PHENOLPHTHALEIN SOLUTION, 1% 478
2286 PHENYLARSINE OXIDE, SOLUTION, 0.00564 N 479
2182 PHOSPHATE BUFFER FOR CHLORINE, pH 7 485
1279 PHOSPHORIC ACID, SOLUTION, 15% 486
2360 PIPERAZINE-N,N’-bis(4-BUTANESULFONIC ACID), PIPBS 488
2362 PIPERAZINE-N,N’-bis(2-ETHANESULFONIC ACID), PIPES 488
2361 PIPERAZINE-N,N’-bis(3-PROPANESULFONIC ACID), PIPPS 488
554 POTASSIUM ACID PHTHALATE, PRIMARY STANDARD (ACS) 494
2354 POTASSIUM ACID PHTHALATE, BUFFER GRADE 494
2096 POTASSIUM ACID PHTHALATE, SOLUTION, 0.100 N 494
76 POTASSIUM BIIODATE, CERTIFIED 495
75 POTASSIUM BIIODATE, PRIMARY STANDARD (ACS) 495
826 POTASSIUM BIIODATE, SOLUTION, 0.025 N 495
2546 POTASSIUM BROMATE-BROMIDE, SOLUTION, 0.2 N 496
2270 POTASSIUM BROMATE-BROMIDE, SOLUTION, 0.1 N 496
1179 POTASSIUM CHLORIDE, SOLUTION, 4 M 498
384 POTASSIUM CHLORIDE, SOLUTION, 1 N 498
2097 POTASSIUM CHLORIDE, SOLUTION, 0.1 N 498
2098 POTASSIUM CHROMATE, 63% W/V, INDICATOR SOLUTION 499
1180 POTASSIUM CHROMATE, SOLUTION, 5% 499
2385 POTASSIUM CITRATE, KF WATER STANDARD 499
78 POTASSIUM DICHROMATE, CERTIFIED 500
730 POTASSIUM DICHROMATE, 0.1 N, SOLUTION 500
3571 POTASSIUM DICHROMATE, 0.5 N, SOLUTION 500
1563 POTASSIUM DICHROMATE, 0.025 N, SOLUTION 500
2100 POTASSIUM FERRICYANIDE, 10% W/V, AQUEOUS SOLUTION 501
2101 POTASSIUM FERROCYANIDE, SOLUTION, 10% W/V 502
2290 POTASSIUM HYDROXIDE, 45% W/W 503
2188 POTASSIUM HYDROXIDE SOLUTION, 2 N 504
1184 POTASSIUM HYDROXIDE SOLUTION, 1 N 504
1183 POTASSIUM HYDROXIDE SOLUTION, 0.5 N 504
1182 POTASSIUM HYDROXIDE SOLUTION, 0.1N 504
1976 POTASSIUM HYDROXIDE SOLUTION, 0.5 N IN METHANOL 504
1674 POTASSIUM HYDROXIDE SOLUTION, 0.1 N IN METHANOL 504
2475 POTASSIUM HYDROXIDE SOLUTION, 0.05 N IN METHANOL 504
1984 POTASSIUM HYDROXIDE SOLUTION, 0.01 N IN METHANOL 504
1972 POTASSIUM HYDROXIDE SOLUTION 0.1 N, IN ISOPROPANOL 505
3572 POTASSIUM HYDROXIDE SOLUTION 0.01 N, in ISOPROPANOL 505
1648 POTASSIUM IODATE, SOLUTION, 0.1 N (0.025 mol/L) TITRANT 505
1185 POTASSIUM IODATE, SOLUTION, 0.1 N, (0.0167 mol/L) IODIMETRIC STANDARD 505
2269 POTASSIUM IODATE-IODIDE, SOLUTION, 0.5 N 505
1564 POTASSIUM IODATE-IODIDE, SOLUTION, 0.1 N 506
2274 POTASSIUM IODIDE, SOLUTION, 20% 506
2191 POTASSIUM IODIDE, SOLUTION 10% W/V 506
2102 POTASSIUM IODIDE, SOLUTION, 5% W/V 506
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9. ANALYTICAL REAGENTS & SOLUTIONS
ITEM # DESCRIPTION PAGE #
1861 POTASSIUM PERMANGANATE, SOLUTION, 1.0 N 509
1186 POTASSIUM PERMANGANATE, SOLUTION, 0.1 N 509
2447 POTASSIUM PERMANGANATE, SOLUTION, 0.0435 N 509
2105 POTASSIUM SODIUM TARTRATE, SOLUTION, 20% W/V 512
2142 POTASSIUM SODIUM TARTRATE, SOLUTION, 10% W/V 512
2103 POTASSIUM THIOCYANATE, SOLUTION, 5% W/V 513
1675 SILVER NITRATE, SOLUTION, 1.0 N 544
ANALYTICAL REAGENTS&SOLUTIONS
2108 SILVER NITRATE, SOLUTION, 0.5 N 544
1228 SILVER NITRATE, SOLUTION, 0.153 N 544
2107 SILVER NITRATE, SOLUTION, 0.141 N 544
733 SILVER NITRATE, SOLUTION, 0.10 N 545
1285 SILVER NITRATE, SOLUTION, 0.05 N 545
2106 SILVER NITRATE, SOLUTION, 0.02 N 545
3514 SILVER NITRATE, SOLUTION, 0.0141 N 545
2187 SILVER NITRATE SOLUTION 10% W/V 545
1542 SODIUM ACETATE, SOLUTION, 20%, IN WATER 548
1084 SODIUM ACETATE, SOLUTION, 10%, IN WATER 548
385 SODIUM ACETATE-2M ACETIC ACID BUFFER 548
2110 SODIUM ARSENITE, SOLUTION, 0.1 N 549
2111 SODIUM BICARBONATE, SOLUTION 0.1 M 550
2112 SODIUM BICARBONATE, 5.5% W/V, SOLUTION 550
2115 SODIUM BROMIDE, SOLUTION, 0.1 M 551
2114 SODIUM BROMIDE SOLUTION, 10% W/V 551
1698 SODIUM CARBONATE, ANHYDROUS, PRIMARY STANDARD (ACS) 552
2119 SODIUM CARBONATE, SOLUTION, 1.0 N 553
2117 SODIUM CARBONATE SOLUTION, 10% W/V 553
2116 SODIUM CARBONATE SOLUTION, 5% W/V 553
2123 SODIUM CHLORIDE, SOLUTION, 0.10 N 553
2122 SODIUM CHLORIDE, SOLUTION, 0.0141N 554
2121 SODIUM CHLORIDE, SOLUTION, 0.1 M 554
2120 SODIUM CHLORIDE SOLUTION, 20% W/V 554
1599 SODIUM CHLORIDE SOLUTION, 0.9% 554
2124 SODIUM CHLORIDE-HYDROXYLAMINE SULFATE SOLUTION 554
2125 SODIUM CHROMATE, SOLUTION, 0.5 M 555
2126 SODIUM CITRATE, SOLUTION, 30% W/V 555
2127 SODIUM CITRATE, SOLUTION 555
2128 SODIUM FLUORIDE, SOLUTION, 0.1 M 557
1579 SODIUM HYDROXIDE, SOLUTION, 10 N 558
1551 SODIUM HYDROXIDE, SOLUTION, 5 N 558
1573 SODIUM HYDROXIDE, SOLUTION, 2 N 558
1193 SODIUM HYDROXIDE, SOLUTION, 1.0 N 558
1192 SODIUM HYDROXIDE, SOLUTION, 0.5 N 558
2198 SODIUM HYDROXIDE, SOLUTION, 0.2 N 559
1191 SODIUM HYDROXIDE, SOLUTION, 0.1 N 559
2172 SODIUM HYDROXIDE, SOLUTION, 0.05 N 559
2133 SODIUM HYDROXIDE, SOLUTION, 0.02 N 559
2132 SODIUM HYDROXIDE, SOLUTION, 0.01 N 559
2291 SODIUM HYDROXIDE, SOLUTION, 0.1 N, IN ETHANOL 559
2292 SODIUM HYDROXIDE SOLUTION 0.01 N, IN ALCOHOL 559
2131 SODIUM HYDROXIDE SOLUTION, 50% W/W, REAGENT GRADE 559
2130 SODIUM HYDROXIDE SOLUTION, 50% W/W, Suitable for Kjeldahl use. 559
2129 SODIUM HYDROXIDE SOLUTION, 25% W/W 560
1989 SODIUM HYDROXIDE SOLUTION, 10% 560
2134 SODIUM HYDROXIDE-THIOSULFATE SOLUTION 560
2763 SODIUM HYPOCHLORITE, SOLUTION, 5% AVAILABLE CHLORINE 560
WE HONOR

10. ANALYTICAL REAGENTS & SOLUTIONS
ITEM # DESCRIPTION PAGE #
2135 SODIUM IODIDE, SOLUTION, 0.10 M 561
2136 SODIUM IONIC STRENGTH ADJUSTER SOLUTION 561
2113 SODIUM META BISULFITE, SOLUTION, 10% W/V 561
2137 SODIUM NITRATE, SOLUTION, 5 M 563
2192 SODIUM NITRITE, SOLUTION, 0.5 N 563
2139 SODIUM NITRITE, SOLUTION, 0.1 M 563
2342 SODIUM NITRITE, SOLUTION, 10% 563
ANALYTICAL REAGENTS&SOLUTIONS
2138 SODIUM NITRITE, SOLUTION, 5% 564
90 SODIUM OXALATE, CERTIFIED, PRIMARY STANDARD 564
2141 SODIUM OXALATE, SOLUTION, 0.10 N 564
2140 SODIUM OXALATE, SOLUTION, 0.05 N 564
2143 SODIUM SULFATE, SOLUTION, 0.10 M 570
2145 SODIUM THIOCYANATE SOLUTION, 0.1 N 571
2144 SODIUM THIOCYANATE SOLUTION, 10% W/V 571
1195 SODIUM THIOSULFATE SOLUTION, 1.0 N 572
2177 SODIUM THIOSULFATE SOLUTION, 0.5 N 572
736 SODIUM THIOSULFATE SOLUTION, 0.1 N 572
2146 SODIUM THIOSULFATE SOLUTION, 0.05 N 572
1559 SODIUM THIOSULFATE SOLUTION, 0.01N 572
2147 SPADNS SOLUTION 574
2149 STANNOUS CHLORIDE, 40%, SOLUTION 575
2148 STANNOUS CHLORIDE, 10% W/V, SOLUTION 575
2150 STANNOUS CHLORIDE, REAGENT I, SOLUTION 575
2151 STANNOUS CHLORIDE, REAGENT II, SOLUTION 575
98 SULFAMIC ACID, CERTIFIED, PRIMARY STANDARD 579
97 SULFAMIC ACID, PRIMARY STANDARD 579
2154 SULFITE-UREA REAGENT SOLUTION 580
1977 SULFURIC ACID, SOLUTION, 18 N 582
2158 SULFURIC ACID, SOLUTION, 5.00 N 582
1557 SULFURIC ACID, SOLUTION, 2.56 N 583
1201 SULFURIC ACID, SOLUTION, 1 N 583
1200 SULFURIC ACID, SOLUTION, 0.5 N 583
2255 SULFURIC ACID, SOLUTION, 0.25 N 583
1199 SULFURIC ACID, SOLUTION, 0.1 N 583
1198 SULFURIC ACID, SOLUTION, 0.02 N 583
2173 SULFURIC ACID, 37%, SOLUTION 583
2911 SULFURIC ACID, SOLUTION, 20% W/V 584
2157 SULFURIC ACID SOLUTION, 10% V/V 584
2156 SULFURIC ACID SOLUTION, 5% V/V 584
2160 TARTARIC ACID SOLUTION, 10% W/V 586
2159 TARTARIC ACID SOLUTION, 2% W/V 586
2432 TETRABUTYLAMMONIUM CHLORIDE, 1.0 M AQUEOUS 591
1561 TETRABUTYLAMMONIUM HYDROXIDE, 0.05 M, AQUEOUS 592
2436 TETRABUTYLAMMONIUM PHOSPHATE BUFFER, pH 7.5 592
2357 N,N,N’,N’-TETRAETHYLETHYLENEDIAMINE 595
2189 THORIN INDICATOR SOLUTION, 0.2% 602
2163 TISAB II, SOLUTION, FOR FLUORIDE 606
1281 TITRATION SOLVENT, ASTM D664, section 7.18 608
1896 TITRATION SOLVENT, ACIDIC 608
2790 TRIETHANOLAMINE, 0.2 N, AQUEOUS SOLUTION 613
176 TRISHYDROXYMETHYLAMINOMETHANE, PRIMARY STANDARD 622
2168 WATER HARDNESS BUFFER SOLUTION, WITH NO ADDED MAGNESIUM 628
2167 WATER HARDNESS BUFFER SOLUTION, WITH MAGNESIUM EDTA 628
2169 WIJS SOLUTION 629
1209 ZINC SULFATE SOLUTION, 5% 638
CALL TOLL FREE 1-800-858-9682 / FAX 1-740-881-5989

11. High-Purity
Quaternary
Ammonium
Salts
ANALYTICAL REAGENTS&SOLUTIONS
HPLC and processes and protocols that examples and broader appli-
Analytical Grade Quats have stringent purity require- cations include:
As a chemical manufacturer ments; this includes suitabili- • Bu4NOH (TBA hydroxide) -
serving analytical labs world- ty for use as polarographic supporting electrolyte;
wide, the addition of product electrolytes and/or HPLC phase-transfer catalyst;
lines targeted directly to that applications. Both methanolic titrant
market is one of our top prior- and aqueous hydroxide solu- • Bu4N(H2PO4) (TBA phos-
ities. Hundreds of GFS prod- tions feature: phate) - ion-pair chromatog-
ucts fit this product profile, • very high alkalinity raphy; buffering medium
and two groups deserve spe- • very low chloride • Me4NCl (TMA chloride) -
cial mention: ultrapure (99.99 • virtual freedom from alkali USP/NF polarographic test
to 99.9999%) materials and metal impurities reagent; catalyst; inhibitor
standard solutions, (for exam- • low ash • Me4NOH (TMA hydroxide) -
ples, see pp. 96-97) and synthetic intermediate;
Quaternary Ammonium salts The EARG line fully comple-
precipitant; etchant; catalyst
and solutions (QUATS). ments the traditional GFS
• Et4NPF6 (TEA hexafluo-
QUAT line, which has found
widespread industrial and rophosphate) - fluoriding
GFS has a long history with agent; biocide precursor
QUATS; our production of commercial use. Some key
tetraalkylammonium perchlo-
rates reflects the company’s
dominant market position in
perchloric acid and inorganic
perchlorate salts. The GFS
QUAT line now includes
Electrometric and Analytical
Reagent Grade (EARG) prod-
ucts.
The EARG line of high purity
QUATS have characteristic
properties that are of particu-
lar interest to chemists and
technicians dealing with

12. Many other products are
available in various purities,
and we make custom formula-
tions on a regular basis.
The chemical literature
reflects a broad and ongoing
interest in QUATS, including
ANALYTICAL REAGENTS&SOLUTIONS
the perchlorate salts. Electro-
analytical studies of
tetraethylammonium perchlo-
rate solutions have elucidated
the nature of cation adsorp-
tion at mercury electrodes.1
A wide range of tetrabutyl-
ammonium perchlorate solu-
tions have been examined for
conductometric and dielectric
behavior.2 Electronic conduc-
tion has also been used to
study the behavior of the
nitrobenzene anion radical in
the presence of tetrabutylam-
monium perchlorate in solid
nitrobenzene.3
In the final analysis, it’s all
part of the greater product
selection and personal service
that you’ve come to expect
from GFS.
1. Journal of Electroanalytical
Chemistry 1989, vol.270 pp. 381-393.
2. Acta Chemica Scandanavia 1989,
vol.43, pp. 103-115.
3. Bulletin of the Chemical Society of
Japan 1989, vol.62, pp. 3413-3416.

13. QUATS INDEX
ITEM # DESCRIPTION PAGE #
2717 ALIQUAT 175 167
3557 CETYLTRIMETHYLAMMONIUM BROMIDE, 98% 248
2515 TETRABUTYLAMMONIUM ACETATE, 1 MOLAR, AQUEOUS 590
2516 TETRABUTYLAMMONIUM BOROHYDRIDE, 98% 590
353 TETRABUTYLAMMONIUM BROMIDE, REAGENT (ACS) 590
2462 TETRABUTYLAMMONIUM CHLORIDE, HYDRATE, 98% 591
2432 TETRABUTYLAMMONIUM CHLORIDE, 1.0 M AQUEOUS 591
ANALYTICAL REAGENTS&SOLUTIONS
2433 TETRABUTYLAMMONIUM DIHYDROGEN PHOSPHATE 591
5147 TETRABUTYLAMMONIUM FLUORIDE, HYDRATE, 98% 591
2435 TETRABUTYLAMMONIUM HEXAFLUOROPHOSPHATE 591
2517 TETRABUTYLAMMONIUM HYDROGEN SULFATE 591
1202 TETRABUTYLAMMONIUM HYDROXIDE, 1.0 M, REAGENT (ACS), AQUEOUS 591
2262 TETRABUTYLAMMONIUM HYDROXIDE, 0.4 M AQUEOUS, ELECTROMETRIC GRADE 591
2444 TETRABUTYLAMMONIUM HYDROXIDE, 1.0 M IN METHYL ALCOHOL 592
3575 TETRABUTYLAMMONIUM HYDROXIDE, 55% AQUEOUS 592
2984 TETRABUTYLAMMONIUM HYDROXIDE, 40% AQUEOUS SOLUTION 592
225 TETRABUTYLAMMONIUM IODIDE, REAGENT 592
394 TETRABUTYLAMMONIUM PERCHLORATE, REAGENT 592
2436 TETRABUTYLAMMONIUM PHOSPHATE BUFFER, pH 7.5 592
2434 TETRABUTYLAMMONIUM TETRAFLUOROBORATE 592
2518 TETRABUTYLAMMONIUM TRIFLUOROMETHANESULFONATE 593
2519 TETRAETHYLAMMONIUM ACETATE, 50%, AQUEOUS SOLUTION 594
1513 TETRAETHYLAMMONIUM BROMIDE 594
1514 TETRAETHYLAMMONIUM CHLORIDE, MONOHYDRATE, 98% 594
2438 TETRAETHYLAMMONIUM HEXAFLUOROPHOSPHATE 594
2439 TETRAETHYLAMMONIUM HYDROXIDE, 1.0M 595
2520 TETRAETHYLAMMONIUM HYDROXIDE, 20%, AQUEOUS SOLUTION 595
2440 TETRAETHYLAMMONIUM IODIDE 595
2522 TETRAETHYLAMMONIUM NITRATE, 35%, AQUEOUS 595
511 TETRAETHYLAMMONIUM PERCHLORATE 595
2437 TETRAETHYLAMMONIUM TETRAFLUOROBORATE 595
366 TETRAHEXYLAMMONIUM IODIDE, REAGENT 596
512 TETRAHEXYLAMMONIUM PERCHLORATE 596
3779 TETRAKIS(TETRABUTYLAMMONIUM) ETHYLENEDIAMINETETRAACETATE, 50% SOLUTION 359
3780 TETRAKIS(TETRAMETHYLAMMONIUM) ETHYLENEDIAMINETETRAACETATE, 30% SOLUTION 597
1515 TETRAMETHYLAMMONIUM BROMIDE, REAGENT (ACS) 598
1516 TETRAMETHYLAMMONIUM CHLORIDE 598
2726 TETRAMETHYLAMMONIUM FLUORIDE, TETRAHYDRATE, 98% 598
2442 TETRAMETHYLAMMONIUM HEXAFLUOROPHOSPHATE 598
2524 TETRAMETHYLAMMONIUM HYDROGEN PHTHALATE, 99% 598
1680 TETRAMETHYLAMMONIUM HYDROXIDE, PENTAHYDRATE 598
2275 TETRAMETHYLAMMONIUM HYDROXIDE, SOLUTION, 1.0 Mol/L in WATER, REAGENT (ACS) 598
1204 TETRAMETHYLAMMONIUM HYDROXIDE, SOLUTION, 25% in WATER 598
2523 TETRAMETHYLAMMONIUM HYDROXIDE, SOLUTION, 25% in METHANOL 599
2443 TETRAMETHYLAMMONIUM IODIDE 599
510 TETRAMETHYLAMMONIUM PERCHLORATE 599
2525 TETRAMETHYLAMMONIUM SILICATE, 18%, AQUEOUS SOLUTION 599
2441 TETRAMETHYLAMMONIUM TETRAFLUOROBORATE 599
2526 TETRAPROPYLAMMONIUM BROMIDE, 98% 600
2527 TETRAPROPYLAMMONIUM CHLORIDE, 98% 600
3500 TETRAPROPYLAMMONIUM HEXAFLUOROPHOSPHATE 600
2528 TETRAPROPYLAMMONIUM HYDROXIDE, 1 M, AQUEOUS SOLUTION 600
WE HONOR