Can AR grade be used to standardise a volumetric solution?

AR grade is fine for preparing volumetric solutions that you then standardise. To standardise them, use a primary standard material such as potassium hydrogen phthalate or sodium carbonate of certified purity, rather than relying on the AR assay alone.

Why do AR limits differ between suppliers?

Because AR is defined by each manufacturer rather than a public compendium. Two AR products may share an assay but list different impurities or limits. If a specific impurity matters to your method, check that it is named on the COA.

Is AR grade suitable for trace metal analysis?

Not usually. AR limits for metals are in ppm, while ICP-MS work needs ppb or ppt levels. For trace metal digestion and standards, choose a grade specified for trace analysis or an electronic grade acid.

Chemical grade

AR Grade (Analytical Reagent) chemicals

High-purity reagents with a minimum assay and named maximum limits for individual impurities, made for quantitative analysis.

1,435 products in this grade

AR Grade (Analytical Reagent) products

97–120 of 1,435 products

2,3,5-Triphenyltetrazolium chloride, 99%

CAS: 298-96-4
Formula: C₁₉H₁₅ClN₄
MW: 334.8 g/mol

ZX-011291

2,4 Dimethoxytoluene, AR

CAS: 38064-90-3
Formula: C₉H₁₂O₂
MW: 152.19 g/mol

ZX-037617

2,4-Dinitrophenol, GR 99%+

CAS: 51-28-5
Formula: C₆H₄N₂O₅
MW: 184.11 g/mol

ZX-008810

2,4-Dinitrophenylhydrazine, GR 99%

CAS: 119-26-6
Formula: C₆H₆N₄O₄
MW: 198.14 g/mol

ZX-008812

2,4,6-Tri(2-pyridyl)-1,3,5-triazine, GR 99%+

CAS: 3682-35-7
Formula: C₁₈H₁₂N₆
MW: 312.3 g/mol

ZX-000006

2,5 Dimethylphenol, AR

CAS: 95-87-4
Formula: C₈H₁₀O
MW: 122.16 g/mol

ZX-038132

2,6-Dibromoquinone-4-chloroimide, GR

CAS: 537-45-1
Formula: C₆H₂Br₂ClNO
MW: 299.35 g/mol

ZX-018176

2,6-Dichloroindophenol sodium salt hydrate, AR

CAS: 1266615-56-8
Formula: C₁₂H₈Cl₂NNaO₃
MW: 308.09 g/mol

ZX-038133

2,6-Dichloroindophenol sodium salt, GR 98%

CAS: 620-45-1
Formula: C₁₂H₆Cl₂NNaO₂
MW: 290.07 g/mol

ZX-000304

2,6-Dichlorophenolindophenol, GR

CAS: 956-48-9
Formula: C₁₂H₇Cl₂NO₂
MW: 268.09 g/mol

ZX-000305

2,6-Dichloroquinone-4-chloroimide, GR

CAS: 101-38-2
Formula: C₆H₂Cl₃NO
MW: 210.4 g/mol

ZX-000435

2,7-Dichlorofluoresceine

CAS: 76-54-0
Formula: C₂₀H₁₀Cl₂O₅
MW: 401.2 g/mol

ZX-002589

3-(2-Pyridyl)-5-6-diphenyl-1-2-4-triazine, 99%

CAS: 1046-56-6
Formula: C₂₀H₁₄N₄
MW: 310.4 g/mol

ZX-011297

3-(2-Pyridyl)-5,6-bis(4-sulfophenyl)-1,2,4-triazine disodium salt, GR 99%+

CAS: 28048-33-1
Formula: C₂₀H₁₂N₄Na₂O₆S₂
MW: 514.4 g/mol

ZX-003241

3-3-Diaminobenzidine Tetra Hydrochloride, AR

CAS: 7411-49-6
Formula: C₁₂H₁₈Cl₄N₄
MW: 360.1 g/mol

ZX-019365

3-Amino acetophenone, GR 98%

CAS: 99-03-6
Formula: C₈H₉NO
MW: 135.16 g/mol

ZX-007040

3-Aminobenzoic acid, AR >99%

CAS: 99-05-8
Formula: C₇H₇NO₂
MW: 137.14 g/mol

ZX-037487

3-Benzoylpropanoic acid, AR >99%

CAS: 2051-95-8
Formula: C₁₀H₁₀O₃
MW: 178.18 g/mol

ZX-037492

3-Cyanopyridine, AR

CAS: 100-54-9
Formula: C₆H₄N₂
MW: 104.11 g/mol

ZX-037591

3-Methoxy acetophenone, AR 97%

CAS: 586-37-8
Formula: C₉H₁₀O₂
MW: 150.17 g/mol

ZX-037665

3-Methyl-2-benzothiazolinone hydrazone hydrochloride, AR ≥97%

CAS: 149022-15-1
Formula: C₈H₁₀ClN₃S
MW: 215.7 g/mol

ZX-019593

3,3-Diaminobenzidine, GR 99%

CAS: 91-95-2
Formula: C₁₂H₁₄N₄
MW: 214.27 g/mol

ZX-008335

3,3'-Diaminobenzidine tetrahydrochloride, 98%+

CAS: 868272-85-9
Formula: C₁₂H₂₀Cl₄N₄O
MW: 378.1 g/mol

ZX-003239

3,3′,5,5′-Tetramethylbenzidine, AR ≥96.0%

CAS: 54827-17-7
Formula: C₁₆H₂₀N₂
MW: 240.34 g/mol

ZX-037204

Compare with other grades

HPLC Grade GC Grade ACS Grade LR Grade (Laboratory Reagent)Extra Pure Grade Molecular Biology Grade Spectroscopy Grade LC-MS Grade IP Grade (Indian Pharmacopoeia)BP Grade (British Pharmacopoeia)USP Grade (United States Pharmacopeia)Ph. Eur. Grade (European Pharmacopoeia)Food Grade (FCC)Technical Grade Electronic Grade Deuterated and Stable-Isotope-Labelled Compounds Pharmaceutical Secondary Reference Standards Grades guide

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