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

793–816 of 1,435 products

Magnesium carbonate, light, GR

CAS: 39409-82-0
Formula: C₄H₁₂Mg₆O₁₉⁺2
MW: 509.96 g/mol

ZX-013479

Magnesium chloride hexahydrate, IP/BP/USP/EP/Ph. Eur., ACS, AR 99.0%

CAS: 7791-18-6
Formula: Cl₂H₁₂MgO₆
MW: 203.3 g/mol

ZX-037690

Magnesium chloride, AR

CAS: 7786-30-3
Formula: Cl₂Mg
MW: 95.21 g/mol

ZX-038193

Magnesium chloride, GR 99%+

CAS: 7791-18-6
Formula: Cl₂H₁₂MgO₆
MW: 203.3 g/mol

ZX-013484

Magnesium fluoride pellets, 1-3 mm, AR ≥98.00%

CAS: 7783-40-6
Formula: F₂Mg
MW: 62.3 g/mol

ZX-037156

Magnesium nitrate, GR 99%+

CAS: 13446-18-9
Formula: H₁₂MgN₂O₁₂
MW: 256.41 g/mol

ZX-013501

Magnesium oxide, light, GR 99%+

CAS: 1309-48-4
Formula: MgO
MW: 40.3 g/mol

ZX-013508

Magnesium perchlorate, hydrate, GR 99%

CAS: 64010-42-0
Formula: Cl₂H₂MgO₉
MW: 241.22 g/mol

ZX-013510

Magnesium sulphate anhydrous, AR

CAS: 7487-88-9
Formula: MgO₄S
MW: 120.37 g/mol

ZX-037198

Magnesium sulphate, GR 99%+

CAS: 10034-99-8
Formula: H₁₄MgO₁₁S
MW: 246.48 g/mol

ZX-013516

Magnesium sulphate, IP/BP/USP/EP/Ph. Eur., ACS, AR

CAS: 10034-99-8
Formula: H₁₄MgO₁₁S
MW: 246.48 g/mol

ZX-038659

Magneson I, GR indicator

CAS: 74-39-5
Formula: C₁₂H₉N₃O₄
MW: 259.22 g/mol

ZX-000613

Magneson II, GR indicator

CAS: 5290-62-0
Formula: C₁₆H₁₁N₃O₃
MW: 293.28 g/mol

ZX-000614

Maleic acid, GR 99%+

CAS: 110-16-7
Formula: C₄H₄O₄
MW: 116.07 g/mol

ZX-007589

Maleic anhydride, GR 99%+

CAS: 108-31-6
Formula: C₄H₂O₃
MW: 98.06 g/mol

ZX-008205

Maleic hydrazide, AR

CAS: 123-33-1
Formula: C₄H₄N₂O₂
MW: 112.09 g/mol

ZX-038187

Malonic acid, GR, 99%+

CAS: 141-82-2
Formula: C₃H₄O₄
MW: 104.06 g/mol

ZX-007591

Maltose, AR

CAS: 6363-53-7
Formula: C₁₂H₂₄O₁₂
MW: 360.31 g/mol

ZX-038186

Manganese acetate, GR 99%+

CAS: 6156-78-1
Formula: C₄H₁₄MnO₈
MW: 245.09 g/mol

ZX-013781

Manganese dioxide, GR

CAS: 1313-13-9
Formula: MnO₂
MW: 86.94 g/mol

ZX-013791

Manganese(II) chloride, tetrahydrate, GR 98%+

CAS: 13446-34-9
Formula: Cl₂H₈MnO₄
MW: 197.9 g/mol

ZX-013806

Manganese(II) sulphate, BP/USP/EP/Ph. Eur., AR

CAS: 10034-96-5
Formula: H₂MnO₅S
MW: 169.02 g/mol

ZX-038660

Manganese(II) sulphate, GR 99%+

CAS: 10034-96-5
Formula: H₂MnO₅S
MW: 169.02 g/mol

ZX-013815

Marfey's reagent, >98%

CAS: 95713-52-3
Formula: C₉H₉FN₄O₅
MW: 272.19 g/mol

ZX-037409

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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