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

817–840 of 1,435 products

MBTH, GR 98%

CAS: 38894-11-0
Formula: C₈H₁₂ClN₃OS
MW: 233.72 g/mol

ZX-011414

Melamine, AR

CAS: 108-78-1
Formula: C₃H₆N₆
MW: 126.12 g/mol

ZX-038185

Mercuric acetate, GR, 99%+

CAS: 1600-27-7
Formula: C₄H₆HgO₄
MW: 318.68 g/mol

ZX-013984

Mercuric chloride, EP, ACS, AR

CAS: 7487-94-7
Formula: Cl₂Hg
MW: 271.5 g/mol

ZX-038675

Mercuric chloride, GR 99%

CAS: 7487-94-7
Formula: Cl₂Hg
MW: 271.5 g/mol

ZX-013990

Mercuric iodide, red, GR 99%+

CAS: 7774-29-0
Formula: HgI₂
MW: 454.4 g/mol

ZX-013993

Mercuric nitrate, GR 99%+

CAS: 7783-34-8
Formula: H₂HgN₂O₇
MW: 342.62 g/mol

ZX-013995

Mercuric oxide, red, GR 99%+

CAS: 21908-53-2
Formula: HgO
MW: 216.59 g/mol

ZX-013997

Mercuric oxide, yellow, GR 99%+

CAS: 21908-53-2
Formula: HgO
MW: 216.59 g/mol

ZX-013999

Mercuric sulphate, GR 99%+

CAS: 7783-35-9
Formula: HgO₄S
MW: 296.66 g/mol

ZX-014001

Mercuric thiocyanate, GR 99%+

CAS: 592-85-8
Formula: C₂HgN₂S₂
MW: 316.8 g/mol

ZX-014003

Mercurous chloride, dihydrate, GR 99%+

CAS: 10112-91-1
Formula: Cl₂Hg₂
MW: 472.09 g/mol

ZX-014005

Mercurous nitrate, GR 98%+

CAS: 14836-60-3
Formula: H₄Hg₂N₂O₈
MW: 561.22 g/mol

ZX-014007

Mercurous sulphate, AR

CAS: 7783-36-0
Formula: Hg₂O₄S
MW: 497.25 g/mol

ZX-019514

Mercury (I) nitrate dihydrate, AR

CAS: 7782-86-7
Formula: H₃HgNO₄⁺
MW: 281.62 g/mol

ZX-019509

Mercury chloranilate, GR

CAS: 33770-60-4
Formula: C₆Cl₂HgO₄
MW: 407.56 g/mol

ZX-014008

Mercury, EP, AR

CAS: 7439-97-6
Formula: Hg
MW: 200.59 g/mol

ZX-038676

Mercury, GR 99%+

CAS: 7439-97-6
Formula: Hg
MW: 200.59 g/mol

ZX-015883

Mercury(II) bromide, GR, 99%+

CAS: 7789-47-1
Formula: Br₂Hg
MW: 360.4 g/mol

ZX-014010

Metanil yellow, GR

CAS: 587-98-4
Formula: C₁₈H₁₄N₃NaO₃S
MW: 375.4 g/mol

ZX-000619

Methane sulphonic acid sodium salt, AR

CAS: 2386-57-4
Formula: CH₃NaO₃S
MW: 118.09 g/mol

ZX-038677

Methane sulphonic acid sodium salt, AR, for HPLC 98%

CAS: 2386-57-4
Formula: CH₃NaO₃S
MW: 118.09 g/mol

ZX-037093

Methanol, ACS, AR 99.8%

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

ZX-037077

Methanol, AR, specially dried ≥99.0%

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

ZX-036972

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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