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

1,369–1,392 of 1,435 products

tri-Sodium citrate, dihydrate, IP/BP/USP/EP/Ph. Eur., ACS, AR

CAS: 6132-04-3
Formula: C₆H₉Na₃O₉
MW: 294.1 g/mol

ZX-038734

tri-Sodium Ortho Phosphate Anhydrous, AR

CAS: 7601-54-9
Formula: Na₃O₄P
MW: 163.94 g/mol

ZX-019454

Tributyl phosphate, GR 99%+

CAS: 126-73-8
Formula: C₁₂H₂₇O₄P
MW: 266.31 g/mol

ZX-010671

Tributylamine, AR, for GC >99%

CAS: 102-82-9
Formula: C₁₂H₂₇N
MW: 185.35 g/mol

ZX-037405

Tributylamine, GR 99%+

CAS: 102-82-9
Formula: C₁₂H₂₇N
MW: 185.35 g/mol

ZX-001831

Trichloroacetic acid, BP/EP/Ph. Eur., ACS, AR

CAS: 76-03-9
Formula: C₂HCl₃O₂
MW: 163.38 g/mol

ZX-038761

Trichloroacetic acid, GR 99%+

CAS: 76-03-9
Formula: C₂HCl₃O₂
MW: 163.38 g/mol

ZX-007713

Trichloroethylene, GR 99%+

CAS: 79-01-6
Formula: C₂HCl₃
MW: 131.38 g/mol

ZX-001832

Triethanolamine hydrochloride, GR 99%+

CAS: 637-39-8
Formula: C₆H₁₆ClNO₃
MW: 185.65 g/mol

ZX-003134

Triethanolamine, GR 99%+

CAS: 102-71-6
Formula: C₆H₁₅NO₃
MW: 149.19 g/mol

ZX-003136

Triethyl citrate, AR

CAS: 77-93-0
Formula: C₁₂H₂₀O₇
MW: 276.28 g/mol

ZX-038524

Triethylamine, AR, specially dried

CAS: 121-44-8
Formula: C₆H₁₅N
MW: 101.19 g/mol

ZX-038762

Triethylamine, GR 99%+

CAS: 121-44-8
Formula: C₆H₁₅N
MW: 101.19 g/mol

ZX-001833

Trifluoroacetic acid, AR ≥99.9%

CAS: 76-05-1
Formula: C₂HF₃O₂
MW: 114.02 g/mol

ZX-037005

Trimethyl silyl triflate, AR

CAS: 27607-77-8
Formula: C₄H₉F₃O₃SSi
MW: 222.26 g/mol

ZX-038122

Trioctylphosphine oxide, GR 99%+

CAS: 78-50-2
Formula: C₂₄H₅₁OP
MW: 386.6 g/mol

ZX-017726

Triphenylcarbinol, 99%

CAS: 76-84-6
Formula: C₁₉H₁₆O
MW: 260.3 g/mol

ZX-002983

Tris buffer, GR 99%+

CAS: 77-86-1
Formula: C₄H₁₁NO₃
MW: 121.14 g/mol

ZX-003140

Tris buffer, IP/BP/USP, ACS, AR

CAS: 77-86-1
Formula: C₄H₁₁NO₃
MW: 121.14 g/mol

ZX-038763

Tris hydrochloride, EP, AR

CAS: 1185-53-1
Formula: C₄H₁₂ClNO₃
MW: 157.59 g/mol

ZX-038765

Tris hydrochloride, GR 99%+

CAS: 1185-53-1
Formula: C₄H₁₂ClNO₃
MW: 157.59 g/mol

ZX-003142

Trypan blue, AR

CAS: 72-57-1
Formula: C₃₄H₂₄N₆Na₄O₁₄S₄
MW: 960.8 g/mol

ZX-038431

Tungstic acid, GR 99%+

CAS: 7783-03-1
Formula: H₂O₄W
MW: 249.85 g/mol

ZX-014087

Uranyl acetate, GR

CAS: 6159-44-0
Formula: UO₂(OCOCH₃)_2.2H₂O
MW: 424.15 g/mol

ZX-010692

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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