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

121–144 of 1,435 products

3,4-Dihydroxybenzaldehyde, AR

CAS: 139-85-5
Formula: C₇H₆O₃
MW: 138.12 g/mol

ZX-037934

3,5-Dinitrobenzoic acid, GR 99%+

CAS: 99-34-3
Formula: C₇H₄N₂O₆
MW: 212.12 g/mol

ZX-007338

3,5-Dinitrosalicylic acid, ≥98% (HPLC and titration)

CAS: 609-99-4
Formula: C₇H₄N₂O₇
MW: 228.12 g/mol

ZX-007341

3,5-Dinitrosalicylic acid, GR 99%+

CAS: 609-99-4
Formula: C₇H₄N₂O₇
MW: 228.12 g/mol

ZX-007340

4-(4-Nitrobenzyl)pyridine, GR 98%+

CAS: 1083-48-3
Formula: C₁₂H₁₀N₂O₂
MW: 214.22 g/mol

ZX-010854

4-Aminoacetophenone, GR 99%+

CAS: 99-92-3
Formula: C₈H₉NO
MW: 135.16 g/mol

ZX-007075

4-Aminoantipyrine, AR >99%

CAS: 83-07-8
Formula: C₁₁H₁₃N₃O
MW: 203.24 g/mol

ZX-037486

4-Bromo acetanilide, AR

CAS: 103-88-8
Formula: C₈H₈BrNO
MW: 214.06 g/mol

ZX-038163

4-Bromoaniline, AR >98%

CAS: 106-40-1
Formula: C₆H₆BrN
MW: 172.02 g/mol

ZX-037305

4-Bromobenzoic acid, AR, for HPLC, analytical standard >99%

CAS: 586-76-5
Formula: C₇H₅BrO₂
MW: 201.02 g/mol

ZX-037490

4-Bromochlorobenzene, AR

CAS: 106-39-8
Formula: C₆H₄BrCl
MW: 191.45 g/mol

ZX-037747

4-Cyanobenzaldehyde, AR

CAS: 105-07-7
Formula: C₈H₅NO
MW: 131.13 g/mol

ZX-037935

4-Cyanopyridine, AR

CAS: 100-48-1
Formula: C₆H₄N₂
MW: 104.11 g/mol

ZX-037592

4-Dimethylaminobenzylidenerhodanine, GR 99%+

CAS: 536-17-4
Formula: C₁₂H₁₂N₂OS₂
MW: 264.4 g/mol

ZX-011385

4-Fluorophenol, GR 99%

CAS: 371-41-5
Formula: C₆H₅FO
MW: 112.1 g/mol

ZX-009727

4-Fluorotoluene, AR

CAS: 352-32-9
Formula: C₇H₇F
MW: 110.13 g/mol

ZX-037929

4-Hydroxybenzoic acid sodium salt, GR 99%

CAS: 114-63-6
Formula: C₇H₅NaO₃
MW: 160.1 g/mol

ZX-007405

4-Iodophenol, AR 99%

CAS: 540-38-5
Formula: C₆H₅IO
MW: 220.01 g/mol

ZX-037633

4-Methyl benzaldehyde, AR

CAS: 104-87-0
Formula: C₈H₈O
MW: 120.15 g/mol

ZX-037936

4-Nitro aniline, GR 99%+

CAS: 100-01-6
Formula: C₆H₆N₂O₂
MW: 138.12 g/mol

ZX-008413

4-Nitro benzaldehyde, GR 99%+

CAS: 555-16-8
Formula: C₇H₅NO₃
MW: 151.12 g/mol

ZX-007100

4-Nitro phenyl hydrazine, GR 99%+

CAS: 100-16-3
Formula: C₆H₇N₃O₂
MW: 153.14 g/mol

ZX-008870

4-Nitrobenzenediazonium tetrafluoroborate, AR 97%

CAS: 456-27-9
Formula: C₆H₄BF₄N₃O₂
MW: 236.92 g/mol

ZX-037619

4-Nitrobenzoic acid, GR 99%+

CAS: 62-23-7
Formula: C₇H₅NO₄
MW: 167.12 g/mol

ZX-007419

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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