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

529–552 of 1,435 products

Diethyl malonate, GR 99%+

CAS: 105-53-3
Formula: C₇H₁₂O₄
MW: 160.17 g/mol

ZX-007809

Diethylamine, GR 99%+

CAS: 109-89-7
Formula: C₄H₁₁N
MW: 73.14 g/mol

ZX-000837

Diethylene glycol diethyl ether, 99%

CAS: 112-36-7
Formula: C₈H₁₈O₃
MW: 162.23 g/mol

ZX-001993

Diethylene glycol, GR 99%+

CAS: 111-46-6
Formula: C₄H₁₀O₃
MW: 106.12 g/mol

ZX-000838

Diethylenetriaminepentaacetic acid, GR 99%+

CAS: 67-43-6
Formula: C₁₄H₂₃N₃O₁₀
MW: 393.35 g/mol

ZX-003305

Digitonin

CAS: 11024-24-1
Formula: C₅₆H₉₂O₂₉
MW: 1229.3 g/mol

ZX-003174

Diiodomethane, AR

CAS: 75-11-6
Formula: CH₂I₂
MW: 267.83 g/mol

ZX-038617

Diisopropyl ether, GR 99%+

CAS: 108-20-3
Formula: C₆H₁₄O
MW: 102.17 g/mol

ZX-001792

Dimedone, GR 99%+

CAS: 126-81-8
Formula: C₈H₁₂O₂
MW: 140.18 g/mol

ZX-007172

Dimethoxy methane anhydrous, AR 99.5%

CAS: 109-87-5
Formula: C₃H₈O₂
MW: 76.09 g/mol

ZX-038618

Dimethyl glyoxime, GR 99%+

CAS: 95-45-4
Formula: C₄H₈N₂O₂
MW: 116.12 g/mol

ZX-008915

Dimethyl phthalate, AR

CAS: 131-11-3
Formula: C₁₀H₁₀O₄
MW: 194.18 g/mol

ZX-038157

Dimethyl sulphoxide, AR, for GC >99.5%

CAS: 67-68-5
Formula: C₂H₆OS
MW: 78.14 g/mol

ZX-037373

Dimethyl sulphoxide, AR, specially dried ≥99.5%

CAS: 67-68-5
Formula: C₂H₆OS
MW: 78.14 g/mol

ZX-037068

Dimethyl sulphoxide, GR 99%+

CAS: 67-68-5
Formula: C₂H₆OS
MW: 78.14 g/mol

ZX-001794

Dimethyl-1,4-phenylenediamine oxalate, AR >98%

CAS: 62778-12-5

ZX-037477

Dimethyl-p-phenylenediamine sulphate, GR 99%

CAS: 536-47-0
Formula: C₈H₁₄N₂O₄S
MW: 234.28 g/mol

ZX-008474

Dimethylglyoxime disodium salt, octahydrate, GR 99%+

CAS: 75006-64-3
Formula: C₄H₂₂N₂Na₂O₁₀
MW: 304.21 g/mol

ZX-010486

Dimidium bromide, AR ≥98.0%

CAS: 518-67-2
Formula: C₂₀H₁₈BrN₃
MW: 380.3 g/mol

ZX-038408

Dioctyl sodium sulphosuccinate, AR

CAS: 577-11-7
Formula: C₂₀H₃₇NaO₇S
MW: 444.6 g/mol

ZX-038159

Diphenyl carbazide, GR 98%+

CAS: 140-22-7
Formula: C₁₃H₁₄N₄O
MW: 242.28 g/mol

ZX-000338

Diphenyl carbazone, GR

CAS: 538-62-5
Formula: C₁₃H₁₂N₄O
MW: 240.26 g/mol

ZX-000339

Diphenyl glyoxime, GR 99%

CAS: 23873-81-6
Formula: C₁₄H₁₂N₂O₂
MW: 240.26 g/mol

ZX-008916

Diphenylamine, AR, for GC >99%

CAS: 122-39-4
Formula: C₁₂H₁₁N
MW: 169.22 g/mol

ZX-037376

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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