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

385–408 of 1,435 products

Cadmium sulphate, GR 99%+

CAS: 7790-84-3
Formula: 3CdSO_4.8H₂O
MW: 769.51 g/mol

ZX-013953

Cadmium, coarse powder, GR 99.9%

CAS: 7440-43-9
Formula: Cd
MW: 112.41 g/mol

ZX-015131

Caffeine anhydrous, IP/BP/EP/Ph. Eur., AR

CAS: 58-08-2
Formula: C₈H₁₀N₄O₂
MW: 194.19 g/mol

ZX-038587

Caffeine, GR 99%+

CAS: 58-08-2
Formula: C₈H₁₀N₄O₂
MW: 194.19 g/mol

ZX-011245

Calcein, GR

CAS: 1461-15-0
Formula: C₃₀H₂₆N₂O₁₃
MW: 622.5 g/mol

ZX-000327

Calcium acetate monohydrate, ACS, AR

CAS: 5743-26-0
Formula: C₄H₈CaO₅
MW: 176.18 g/mol

ZX-037172

Calcium acetate, GR 99%

CAS: 114460-21-8
Formula: C₄H₈CaO₅
MW: 176.18 g/mol

ZX-013392

Calcium bis(dihydrogenphosphate), GR

CAS: 10031-30-8
Formula: CaH₆O₉P₂
MW: 252.07 g/mol

ZX-013397

Calcium carbonate, GR 99%+

CAS: 471-34-1
Formula: CCaO₃
MW: 100.09 g/mol

ZX-013410

Calcium chloride, dihydrate, GR 99%+

CAS: 10035-04-8
Formula: CaCl₂H₄O₂
MW: 147.01 g/mol

ZX-013412

Calcium chloride, dihydrate, IP/BP/USP/EP/Ph. Eur., AR

CAS: 10035-04-8
Formula: CaCl₂H₄O₂
MW: 147.01 g/mol

ZX-038008

Calcium chloride, dihydrate, spezial, GR 99%+

CAS: 10035-04-8
Formula: CaCl₂H₄O₂
MW: 147.01 g/mol

ZX-013413

Calcium chloride, fused anhydrous, AR

CAS: 10043-52-4
Formula: CaCl₂
MW: 110.98 g/mol

ZX-038291

Calcium dihydrogen phosphate, monohydrate, GR 95%+

CAS: 7758-23-8
Formula: CaH₄O₈P₂
MW: 234.05 g/mol

ZX-013420

Calcium fluoride, 0.7-3.5 mm, AR

CAS: 7789-75-5
Formula: CaF₂
MW: 78.07 g/mol

ZX-037195

Calcium hydride, AR

CAS: 7789-78-8

ZX-037281

Calcium hydroxide, GR 96%+

CAS: 1305-62-0
Formula: CaH₂O₂
MW: 74.09 g/mol

ZX-013438

Calcium nitrate, GR 99%+

CAS: 13477-34-4
Formula: CaH₈N₂O₁₀
MW: 236.15 g/mol

ZX-013447

Calcium oxide, GR 98%+

CAS: 1305-78-8
Formula: CaO
MW: 56.08 g/mol

ZX-000042

Calcium propionate, GR

CAS: 4075-81-4
Formula: C₆H₁₀CaO₄
MW: 186.22 g/mol

ZX-007479

Calcium silicate, AR

CAS: 1344-95-2
Formula: CaH₆O₈Si₂
MW: 230.29 g/mol

ZX-038149

Calcium sulphate, AR, specially dried 99.00–101.00%

CAS: 7778-18-9
Formula: CaO₄S
MW: 136.14 g/mol

ZX-038289

Calcium sulphate, dihydrate, GR 99%+

CAS: 10101-41-4
Formula: CaH₄O₆S
MW: 172.17 g/mol

ZX-013457

Calconcarboxylic acid, GR

CAS: 3737-95-9
Formula: C₂₁H₁₄N₂O₇S
MW: 438.4 g/mol

ZX-000525

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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