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

481–504 of 1,435 products

Crystal violet, GR

CAS: 548-62-9
Formula: C₂₅H₃₀ClN₃
MW: 408 g/mol

ZX-000548

Cupferron, AR

CAS: 135-20-6
Formula: C₆H₉N₃O₂
MW: 155.15 g/mol

ZX-019669

Cupric acetate, monohydrate, GR 99%+

CAS: 6046-93-1
Formula: C₄H₈CuO₅
MW: 199.65 g/mol

ZX-013679

Cupric chloride, dihydrate, GR 99%+

CAS: 10125-13-0
Formula: Cl₂CuH₂O
MW: 152.46 g/mol

ZX-013684

Cupric nitrate, GR 99%+

CAS: 10031-43-3
Formula: CuH₆N₂O₉
MW: 241.6 g/mol

ZX-013688

Cupric oxide, GR 99%+

CAS: 1317-38-0
Formula: CuO
MW: 79.55 g/mol

ZX-013692

Cupric sulphate, anhydrous, GR 99%+

CAS: 7758-98-7
Formula: CuO₄S
MW: 159.61 g/mol

ZX-013695

Cupric sulphate, pentahydrate, BP/USP/EP/Ph. Eur., ACS, AR

CAS: 7758-99-8
Formula: CuH₁₀O₉S
MW: 249.69 g/mol

ZX-038606

Cupric sulphate, pentahydrate, GR 99%+

CAS: 7758-99-8
Formula: CuH₁₀O₉S
MW: 249.69 g/mol

ZX-013698

Cuprous chloride, GR 97%+

CAS: 7758-89-6
Formula: ClCu
MW: 99 g/mol

ZX-013705

Cyclohexane, AR, for GC >99.5%

CAS: 110-82-7
Formula: C₆H₁₂
MW: 84.16 g/mol

ZX-037348

Cyclohexane, GR 99%+

CAS: 110-82-7
Formula: C₆H₁₂
MW: 84.16 g/mol

ZX-001783

Cyclohexane, specially dried, GR 99.5%

CAS: 110-82-7
Formula: C₆H₁₂
MW: 84.16 g/mol

ZX-001784

Cyclohexanol, GR 99%+

CAS: 108-93-0
Formula: C₆H₁₂O
MW: 100.16 g/mol

ZX-001785

Cyclohexanone, AR, for GC >99.5%

CAS: 108-94-1
Formula: C₆H₁₀O
MW: 98.14 g/mol

ZX-037350

Cyclohexanone, GR 99%+

CAS: 108-94-1
Formula: C₆H₁₀O
MW: 98.14 g/mol

ZX-001786

Cyclohexylamine, GR 99%+

CAS: 108-91-8
Formula: C₆H₁₃N
MW: 99.17 g/mol

ZX-001990

Cyclopentane, AR, for GC >99%

CAS: 287-92-3
Formula: C₅H₁₀
MW: 70.13 g/mol

ZX-037351

Cyclopentyl methyl ether, GR 99%+

CAS: 5614-37-9
Formula: C₆H₁₂O
MW: 100.16 g/mol

ZX-001787

Cycocel, AR

CAS: 999-81-5
Formula: C₅H₁₃Cl₂N
MW: 158.07 g/mol

ZX-038153

D-(+)-Glucose anhydrous, IP/BP/USP/EP/Ph. Eur., AR

CAS: 50-99-7
Formula: C₆H₁₂O₆
MW: 180.16 g/mol

ZX-038072

D-Arabinose, GR 99%+

CAS: 10323-20-3
Formula: C₅H₁₀O₅
MW: 150.13 g/mol

ZX-007165

D-Fructose, GR 99%

CAS: 57-48-7
Formula: C₆H₁₂O₆
MW: 180.16 g/mol

ZX-002462

D-Leucine, AR

CAS: 328-38-1
Formula: C₆H₁₃NO₂
MW: 131.17 g/mol

ZX-037974

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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