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

1,417–1,435 of 1,435 products

Zinc nitrate, GR 98%+

CAS: 10196-18-6
Formula: H₁₂N₂O₁₂Zn
MW: 297.5 g/mol

ZX-013889

Zinc oxide, GR 99.5%+

CAS: 1314-13-2
Formula: OZn
MW: 81.4 g/mol

ZX-013898

Zinc Perchlorate, AR

CAS: 10025-64-6
Formula: Cl₂H₁₂O₁₄Zn
MW: 372.4 g/mol

ZX-019370

Zinc selenite, GR 99%+

CAS: 13597-46-1
Formula: O₃SeZn
MW: 192.3 g/mol

ZX-013902

Zinc sulphate, GR 99%+

CAS: 7446-20-0
Formula: H₁₄O₁₁SZn
MW: 287.6 g/mol

ZX-013906

Zinc sulphate, IP/BP/USP/EP/Ph. Eur., AR

CAS: 7446-20-0
Formula: H₁₄O₁₁SZn
MW: 287.6 g/mol

ZX-037164

Zinc wire, 1.0 mm dia approx, GR 99.99%

CAS: 7440-66-6
Formula: Zn
MW: 65.4 g/mol

ZX-015716

Zincon sodium salt, GR

CAS: 56484-13-0
Formula: C₂₀H₁₅N₄NaO₆S
MW: 462.4 g/mol

ZX-000740

Zincon, AR

CAS: 135-52-4
Formula: C₂₀H₁₆N₄O₆S
MW: 440.4 g/mol

ZX-019461

Zincon, GR

CAS: 62625-22-3
Formula: C₂₀H₁₅N₄NaO₆S
MW: 462.4 g/mol

ZX-000425

Zirconium dioxide, GR 99.5%

CAS: 1314-23-4
Formula: O₂Zr
MW: 123.22 g/mol

ZX-014107

Zirconium oxychloride, GR 99%+

CAS: 13520-92-8
Formula: Cl₂H₂O₂Zr
MW: 196.14 g/mol

ZX-014123

α-Benzoin oxime, GR 99%+

CAS: 441-38-3
Formula: C₁₄H₁₃NO₂
MW: 227.26 g/mol

ZX-008978

α-Cyclodextrin, AR

CAS: 10016-20-3
Formula: C₃₆H₆₀O₃₀
MW: 972.8 g/mol

ZX-037668

α-Naphthol phthalein, AR

CAS: 596-01-0
Formula: C₂₈H₁₈O₄
MW: 418.4 g/mol

ZX-037455

α-Naphtholbenzein (pH Indicator), AR

CAS: 145-50-6
Formula: C₂₇H₁₈O₂
MW: 374.4 g/mol

ZX-037456

α-Pinene, AR 98%

CAS: 80-56-8
Formula: C₁₀H₁₆
MW: 136.23 g/mol

ZX-037669

β-Carotene

CAS: 7235-40-7
Formula: C₄₀H₅₆
MW: 536.9 g/mol

ZX-038145

β-Naphthol violet

CAS: 7143-21-7
Formula: C₁₆H₉N₃Na₂O₉S₂
MW: 497.4 g/mol

ZX-000742

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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