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

841–864 of 1,435 products

Methanol, BP/USP/EP/Ph. Eur., AR

CAS: 67-56-1
Formula: CH₄O
MW: 32.04 g/mol

ZX-038661

Methyl acetate, AR, for GC >99.5%

CAS: 79-20-9
Formula: C₃H₆O₂
MW: 74.08 g/mol

ZX-038680

Methyl acetate, GR 99%+

CAS: 79-20-9
Formula: C₃H₆O₂
MW: 74.08 g/mol

ZX-001806

Methyl aceto acetate, GR 99+

CAS: 105-45-3
Formula: C₅H₈O₃
MW: 116.11 g/mol

ZX-007945

Methyl benzoate, AR

CAS: 93-58-3
Formula: C₈H₈O₂
MW: 136.15 g/mol

ZX-038183

Methyl iodide, AR

CAS: 74-88-4
Formula: CH₃I
MW: 141.94 g/mol

ZX-038181

Methyl iodide, AR, for GC >99.5%

CAS: 74-88-4
Formula: CH₃I
MW: 141.94 g/mol

ZX-037287

Methyl isobutyl carbinol

CAS: 108-11-2
Formula: C₆H₁₄O
MW: 102.17 g/mol

ZX-038135

Methyl isobutyl ketone, GR 99%+

CAS: 108-10-1
Formula: C₆H₁₂O
MW: 100.16 g/mol

ZX-001807

Methyl phenyl acetate, AR

CAS: 101-41-7
Formula: C₉H₁₀O₂
MW: 150.17 g/mol

ZX-038180

Methyl thymol blue, GR

CAS: 1945-77-3
Formula: C₃₇H₄₀N₂Na₄O₁₃S
MW: 844.7 g/mol

ZX-000628

Methylene blue, GR

CAS: 122965-43-9
Formula: C₁₆H₂₀ClN₃OS
MW: 337.9 g/mol

ZX-000632

Methylene blue, polychrome, AR, for microscopy

CAS: 61-73-4
Formula: C₁₆H₁₈ClN₃S
MW: 319.9 g/mol

ZX-038662

Metol, AR

CAS: 55-55-0
Formula: C₁₄H₂₀N₂O₆S
MW: 344.39 g/mol

ZX-038179

Molybdenum trioxide, GR 99%+

CAS: 1313-27-5
Formula: MoO₃
MW: 143.95 g/mol

ZX-014023

Molybdic acid, GR 85%

CAS: 7782-91-4
Formula: H₂MoO₄
MW: 161.96 g/mol

ZX-014026

Monensin sodium, AR

CAS: 22373-78-0
Formula: C₃₆H₆₁NaO₁₁
MW: 692.9 g/mol

ZX-038044

mono-Chloroacetic acid, GR 99%+

CAS: 79-11-8
Formula: C₂H₃ClO₂
MW: 94.5 g/mol

ZX-007596

mono-Chlorobenzene, GR 99%+

CAS: 108-90-7
Formula: C₆H₅Cl
MW: 112.55 g/mol

ZX-001808

Morin, GR

CAS: 480-16-0
Formula: C₁₅H₁₀O₇
MW: 302.23 g/mol

ZX-002907

Morpholine, GR 99%+

CAS: 110-91-8
Formula: C₄H₉NO
MW: 87.12 g/mol

ZX-001809

Morpholino propane sulphonic acid, AR ≥99%

CAS: 1132-61-2
Formula: C₇H₁₅NO₄S
MW: 209.27 g/mol

ZX-038383

Mounted AR Coated Aspheric Lens (f = 50 mm)

ZX-016939

Mounted AR Coated Aspheric Lens, 10 mm Clear Aperture

ZX-016940

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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