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

553–576 of 1,435 products

Diphenylamine, EP/Ph. Eur., ACS, AR

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

ZX-038620

Diphenylamine, GR 99%+

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

ZX-008482

Disulphine blue, AR

CAS: 129-17-9
Formula: C₂₇H₃₁N₂NaO₆S₂
MW: 566.7 g/mol

ZX-038160

Dithioxamide, GR 99%+

CAS: 79-40-3
Formula: C₂H₄N₂S₂
MW: 120.2 g/mol

ZX-009922

Dithiozone, ACS, AR, for spectroscopy ≥85.00%

CAS: 60-10-6
Formula: C₁₃H₁₂N₄S
MW: 256.33 g/mol

ZX-038305

Dithiozone, GR 99%+

CAS: 60-10-6
Formula: C₁₃H₁₂N₄S
MW: 256.33 g/mol

ZX-000554

DL-Phenyl glycine, GR 99%+

CAS: 2835-06-5
Formula: C₈H₉NO₂
MW: 151.16 g/mol

ZX-002381

DL-Tropic acid, GR 99%

CAS: 529-64-6
Formula: C₉H₉O₃-
MW: 165.17 g/mol

ZX-007536

Dodecyltrimethylammonium bromide, AR

CAS: 1119-94-4
Formula: C₁₅H₃₄BrN
MW: 308.34 g/mol

ZX-037704

Dysprosium carbonate, GR 99%+

CAS: 38245-35-1
Formula: C₃H₈Dy₂O₁₃
MW: 577.09 g/mol

ZX-014655

Dysprosium nitrate, GR 99.99%

CAS: 10031-49-9
Formula: DyH₁₀N₃O₁₄
MW: 438.59 g/mol

ZX-014658

Dysprosium oxide, GR 99.9%

CAS: 1308-87-8
Formula: Dy₂O₃
MW: 373 g/mol

ZX-014527

Dysprosium sulphate, GR 99.99%

CAS: 14373-91-2
Formula: Dy₂O₁₂S₃
MW: 613.2 g/mol

ZX-014659

EDTA disodium salt, EP/Ph. Eur., ACS, AR

CAS: 6381-92-6
Formula: C₁₀H₁₈N₂Na₂O₁₀
MW: 372.24 g/mol

ZX-038624

EDTA disodium salt, GR 99%+

CAS: 6381-92-6
Formula: C₁₀H₁₈N₂Na₂O₁₀
MW: 372.24 g/mol

ZX-000352

EDTA disodium salt, IP/BP/USP/EP/Ph. Eur., ACS, AR 99.5%

CAS: 6381-92-6
Formula: C₁₀H₁₈N₂Na₂O₁₀
MW: 372.24 g/mol

ZX-037689

EDTA tetrasodium salt dihydrate, AR

CAS: 10378-23-1
Formula: C₁₀H₁₆N₂Na₄O₁₀
MW: 416.2 g/mol

ZX-018859

EDTA zinc, AR

CAS: 14025-21-9
Formula: C₁₀H₁₂N₂Na₂O₈Zn
MW: 399.6 g/mol

ZX-019470

EGTA, GR 99%

CAS: 67-42-5
Formula: C₁₄H₂₄N₂O₁₀
MW: 380.35 g/mol

ZX-003325

Epichlorohydrin, GR 99%+

CAS: 106-89-8
Formula: C₃H₅ClO
MW: 92.52 g/mol

ZX-009353

Erbium oxide, GR 99.99%

CAS: 12061-16-4
Formula: Er₂O₃
MW: 382.52 g/mol

ZX-014533

Eriochrome black T, GR indicator

CAS: 1787-61-7
Formula: C₂₀H₁₂N₃NaO₇S
MW: 461.4 g/mol

ZX-000562

Eriochrome cyanine R

CAS: 3564-18-9
Formula: C₂₃H₁₅Na₃O₉S
MW: 536.4 g/mol

ZX-000355

Eschka's mixture, AR 42.0%

CAS: 8007-09-8
Formula: 2MgO.Na₂CO₃
MW: 186.99 g/mol

ZX-036981

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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