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

265–288 of 1,435 products

Anthraquinone-2-sulphonic acid sodium salt, monohydrate, GR 98%

CAS: 153277-35-1
Formula: C₁₄H₉NaO₆S
MW: 328.27 g/mol

ZX-009879

Anthraquinone, GR 99%+

CAS: 84-65-1
Formula: C₁₄H₈O₂
MW: 208.21 g/mol

ZX-007144

Anthrone, GR 99%

CAS: 90-44-8
Formula: C₁₄H₁₀O
MW: 194.23 g/mol

ZX-000473

Antimony ingot, AR

CAS: 7440-36-0
Formula: Sb
MW: 121.76 g/mol

ZX-037829

Antimony potassium tartrate, GR 99%+

CAS: 28300-74-5
Formula: C₈H₁₀K₂O₁₅Sb₂
MW: 667.87 g/mol

ZX-007455

Antimony sulphate, AR

CAS: 7446-32-4
Formula: O₁₂S₃Sb₂
MW: 531.7 g/mol

ZX-019462

Antimony trichloride, GR 99%+

CAS: 10025-91-9
Formula: Cl₃Sb
MW: 228.11 g/mol

ZX-014206

Antimony(III) oxide, GR 99%+

CAS: 1309-64-4
Formula: O₃Sb₂
MW: 291.52 g/mol

ZX-014213

AR-13324 M1 metabolite

CAS: 2309668-15-1
Formula: C₁₉H₁₉N₃O₂
MW: 321.4 g/mol

ZX-022256

Ar-Vinylbenzyl chloride

CAS: 30030-25-2
Formula: C₉H₉Cl
MW: 152.62 g/mol

ZX-046070

Arsenazo I, GR indicator

CAS: 520-10-5
Formula: C₁₆H₁₃AsN₂O₁₁S₂
MW: 548.3 g/mol

ZX-000474

Arsenazo III

CAS: 62337-00-2
Formula: C₂₂H₁₆As₂N₄Na₂O₁₄S₂
MW: 820.3 g/mol

ZX-018802

Arsenazo III, GR indicator

CAS: 1668-00-4
Formula: C₂₂H₁₈As₂N₄O₁₄S₂
MW: 776.4 g/mol

ZX-000318

Arsenic(III) oxide, GR 99%+

CAS: 1327-53-3
Formula: As₂O₃
MW: 197.84 g/mol

ZX-014222

Atropine sulphate, AR ≥99.0%

CAS: 5908-99-6
Formula: C₃₄H₅₀N₂O₁₁S
MW: 694.8 g/mol

ZX-037193

Azomethane H

CAS: 5941-07-1
Formula: C₁₇H₁₂NNaO₈S₂
MW: 445.4 g/mol

ZX-000479

Barbituric acid, GR 99%+

CAS: 67-52-7
Formula: C₄H₄N₂O₃
MW: 128.09 g/mol

ZX-000017

Barium acetate, GR 98%+

CAS: 543-80-6
Formula: C₄H₆BaO₄
MW: 255.41 g/mol

ZX-013323

Barium bromide, GR 99%

CAS: 7791-28-8
Formula: BaBr_2.2H₂O
MW: 333.17 g/mol

ZX-013329

Barium carbonate, EP/Ph. Eur., ACS

CAS: 513-77-9
Formula: CBaO₃
MW: 197.34 g/mol

ZX-038573

Barium carbonate, GR 99%+

CAS: 513-77-9
Formula: CBaO₃
MW: 197.34 g/mol

ZX-013335

Barium chloranilate, GR 99%+

CAS: 32458-20-1
Formula: C₆H₆BaCl₂O₇
MW: 398.34 g/mol

ZX-001109

Barium chlorate, GR 99%+

CAS: 10294-38-9
Formula: BaCl₂H₂O₇
MW: 322.24 g/mol

ZX-013337

Barium chloride, EP/Ph. Eur., ACS

CAS: 10326-27-9
Formula: BaCl₂H₄O₂
MW: 244.26 g/mol

ZX-038574

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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