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

361–384 of 1,435 products

Bromopyrogallol red, GR

CAS: 16574-43-9
Formula: C₁₉H₁₀Br₂O₈S
MW: 558.2 g/mol

ZX-000325

Bromosulphophthalein, AR

CAS: 71-67-0
Formula: C₂₀H₈Br₄Na₂O₁₀S₂
MW: 838 g/mol

ZX-037630

Brucine sulphate heptahydrate, ACS, AR

CAS: 5787-00-8
Formula: C₄₆H₆₈N₄O₁₉S
MW: 1013.1 g/mol

ZX-019563

Brucine sulphate, AR

CAS: 60583-39-3
Formula: C₄₆H₆₈N₄O₁₉S
MW: 1013.1 g/mol

ZX-019465

Brucine, GR 99%+

CAS: 357-57-3
Formula: C₂₃H₂₆N₂O₄
MW: 394.5 g/mol

ZX-010333

Butyl acetate, GR 99%+

CAS: 123-86-4
Formula: C₆H₁₂O₂
MW: 116.16 g/mol

ZX-001979

Butyl bromide, AR

CAS: 109-65-9
Formula: C₄H₉Br
MW: 137.02 g/mol

ZX-038175

Butyl chloride, AR

CAS: 109-69-3
Formula: C₄H₉Cl
MW: 92.57 g/mol

ZX-038174

Butyl ether, AR 99%

CAS: 142-96-1
Formula: C₈H₁₈O
MW: 130.23 g/mol

ZX-037088

Butyric anhydride, GR 99%+

CAS: 106-31-0
Formula: C₈H₁₄O₃
MW: 158.19 g/mol

ZX-008179

Butyrophenone, AR

CAS: 495-40-9
Formula: C₁₀H₁₂O
MW: 148.2 g/mol

ZX-038039

Cacotheline, GR

CAS: 561-20-6
Formula: C₂₁H₂₁N₃O₇
MW: 427.4 g/mol

ZX-000326

Cadion, GR

CAS: 5392-67-6
Formula: C₁₈H₁₄N₆O₂
MW: 346.3 g/mol

ZX-008908

Cadmium acetate, EP, AR, for microscopy

CAS: 5743-04-4
Formula: C₄H₁₀CdO₆
MW: 266.53 g/mol

ZX-038585

Cadmium acetate, GR 99%+

CAS: 5743-04-4
Formula: C₄H₁₀CdO₆
MW: 266.53 g/mol

ZX-013932

Cadmium bromide, AR

CAS: 7789-42-6
Formula: Br₂Cd
MW: 272.22 g/mol

ZX-038148

Cadmium Chloride Dried Anhydrous, ACS, AR, specially dried

CAS: 10108-64-2
Formula: CdCl₂
MW: 183.32 g/mol

ZX-019415

Cadmium chloride hemipentahydrate, ACS, AR

CAS: 7790-78-5
Formula: Cd₂Cl₄H₁₀O₅
MW: 456.7 g/mol

ZX-019661

Cadmium chloride, monohydrate, GR 99%+

CAS: 35658-65-2
Formula: CdCl₂H₂O
MW: 201.33 g/mol

ZX-013939

Cadmium granular, GR 99.9%

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

ZX-015773

Cadmium iodide, AR

CAS: 7790-80-9
Formula: CdI₂
MW: 366.22 g/mol

ZX-038280

Cadmium nitrate, ≥99%

CAS: 10022-68-1
Formula: CdH₈N₂O₁₀
MW: 308.49 g/mol

ZX-013945

Cadmium nitrate, GR 99%+

CAS: 10022-68-1
Formula: CdH₈N₂O₁₀
MW: 308.49 g/mol

ZX-013944

Cadmium oxide, GR 99%+

CAS: 1306-19-0
Formula: CdO
MW: 128.41 g/mol

ZX-013948

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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