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

25–48 of 1,435 products

1-Hydroxy-7-azabenzotriazole, AR

CAS: 39968-33-7
Formula: C₅H₄N₄O
MW: 136.11 g/mol

ZX-037750

1-Methyl 2-pyrrollidone, GR 99%+

CAS: 872-50-4
Formula: C₅H₉NO
MW: 99.13 g/mol

ZX-001764

1-Naphthol, GR 99%+

CAS: 90-15-3
Formula: C₁₀H₈O
MW: 144.17 g/mol

ZX-009173

1-Naphthyl acetate, GR 99%+

CAS: 830-81-9
Formula: C₁₂H₁₀O₂
MW: 186.21 g/mol

ZX-002585

1-Naphthylacetic acid, GR 99%+

CAS: 86-87-3
Formula: C₁₂H₁₀O₂
MW: 186.21 g/mol

ZX-002588

1-Naphthylamine, GR 99%+

CAS: 134-32-7
Formula: C₁₀H₉N
MW: 143.18 g/mol

ZX-008265

1-Nitroso-2-naphthol, GR 99%+

CAS: 131-91-9
Formula: C₁₀H₇NO₂
MW: 173.17 g/mol

ZX-009175

1-Octane sulphonic acid sodium salt (monohydrate), AR, for HPLC ≥99%

CAS: 207596-29-0
Formula: C₈H₁₉NaO₄S
MW: 234.29 g/mol

ZX-018683

1-Octane sulphonic acid sodium salt anhydrous, AR

CAS: 5324-84-5
Formula: C₈H₁₈NaO₃S
MW: 217.28 g/mol

ZX-038127

1-Octane sulphonic acid sodium salt anhydrous, AR, for HPLC ≥99%

CAS: 5324-84-5
Formula: C₈H₁₈NaO₃S
MW: 217.28 g/mol

ZX-037002

1-Octanol, GR 99%+

CAS: 111-87-5
Formula: C₈H₁₈O
MW: 130.23 g/mol

ZX-001765

1-Pentane sulphonic acid sodium salt anhydrous, AR, for HPLC ≥99%

CAS: 22767-49-3
Formula: C₅H₁₁NaO₃S
MW: 174.2 g/mol

ZX-036979

1-Pentanesulphonic acid sodium salt monohydrate, AR, for HPLC

CAS: 207605-40-1
Formula: C₅H₁₃NaO₄S
MW: 192.21 g/mol

ZX-018630

1-Pentanol, GR 99%+

CAS: 71-41-0
Formula: C₅H₁₂O
MW: 88.15 g/mol

ZX-001766

1-Phenyl 5-mercapto tetrazole, AR 97.0%

CAS: 86-93-1
Formula: C₇H₆N₄S
MW: 178.22 g/mol

ZX-037751

1-Propanol, GR 99%+

CAS: 71-23-8
Formula: C₃H₈O
MW: 60.1 g/mol

ZX-001767

1-Thioglycerol, AR ≥98%

CAS: 96-27-5
Formula: C₃H₈O₂S
MW: 108.16 g/mol

ZX-037095

1,1,1-Trichloroethane, AR 99%

CAS: 71-55-6
Formula: C₂H₃Cl₃
MW: 133.4 g/mol

ZX-037780

1,1,2-Trichlorotrifluoroethane, GR 99%+

CAS: 76-13-1
Formula: C₂Cl₃F₃
MW: 187.37 g/mol

ZX-001941

1,1,2,2-Tetrachloroethane, GR 99%+

CAS: 79-34-5
Formula: C₂H₂Cl₄
MW: 167.8 g/mol

ZX-001758

1,10-Phenanthroline hydrochloride, AR

CAS: 3829-86-5
Formula: C₁₂H₉ClN₂
MW: 216.66 g/mol

ZX-018882

1,10-Phenanthroline hydrochloride, GR 99%+

CAS: 18851-33-7
Formula: C₁₂H₁₁ClN₂O
MW: 234.68 g/mol

ZX-003713

1,10-Phenanthroline, GR 99%+

CAS: 5144-89-8
Formula: C₁₂H₁₀N₂O
MW: 198.22 g/mol

ZX-002729

1,2-Dibromoethane, AR 98.0%

CAS: 106-93-4
Formula: C₂H₄Br₂
MW: 187.86 g/mol

ZX-037745

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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