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

1,105–1,128 of 1,435 products

Pyrocatechol, GR 99%+

CAS: 120-80-9
Formula: C₆H₆O₂
MW: 110.11 g/mol

ZX-002701

Pyrogallol Red, AR

CAS: 85531-30-2
Formula: C₁₉H₁₂O₈S
MW: 400.4 g/mol

ZX-019699

Pyrogallol red, GR

CAS: 32638-88-3
Formula: C₁₉H₁₂O₈S
MW: 400.4 g/mol

ZX-000691

Pyrogallol, EP/Ph. Eur., AR

CAS: 87-66-1
Formula: C₆H₆O₃
MW: 126.11 g/mol

ZX-038725

Pyrogallol, GR 99%+

CAS: 87-66-1
Formula: C₆H₆O₃
MW: 126.11 g/mol

ZX-002703

Pyrrolidine, GR 99%+

CAS: 123-75-1
Formula: C₄H₉N
MW: 71.12 g/mol

ZX-011708

Qpan 60, AR

CAS: 1338-41-6
Formula: C₂₄H₄₆O₆
MW: 430.6 g/mol

ZX-038433

Qpan 80, AR

CAS: 1338-43-8
Formula: C₂₄H₄₄O₆
MW: 428.6 g/mol

ZX-038434

Quarter wave plate (Diameter: 12.7mm, Coating: AR/ AR, R<0.25%@1064nm)

ZX-017289

Quarter wave plate (Diameter: 12.7mm, Coating: AR/ AR, R<0.25%@532nm)

ZX-017290

Quarter wave plate (Diameter: 12.7mm, Coating: AR/ AR, R<0.25%@808nm)

ZX-017291

Quarter wave plate (Diameter: 20mm,Coating: AR/ AR, R<0.25%@633nm)

ZX-017292

Quartz, fine granular, GR

CAS: 14808-60-7
Formula: O₂Si
MW: 60.08 g/mol

ZX-014378

Quartz, very fine granular, GR

CAS: 14808-60-7
Formula: O₂Si
MW: 60.08 g/mol

ZX-014379

Quin 20, AR

CAS: 9005-64-5

ZX-038136

Quin 80, AR

CAS: 9005-65-6

ZX-038432

Quinaldic acid, GR 98%+

CAS: 93-10-7
Formula: C₁₀H₇NO₂
MW: 173.17 g/mol

ZX-011169

Quinaldine red, GR

CAS: 117-92-0
Formula: C₂₁H₂₃IN₂
MW: 430.3 g/mol

ZX-000694

Quinalizarin, GR 90%

CAS: 81-61-8
Formula: C₁₄H₈O₆
MW: 272.21 g/mol

ZX-002951

Quinhydrone, GR 97%

CAS: 106-34-3
Formula: C₁₂H₁₀O₄
MW: 218.2 g/mol

ZX-007226

Quinine Glycero Phosphate, AR

CAS: 146-39-4
Formula: C₄₃H₅₇N₄O₁₀P
MW: 820.9 g/mol

ZX-019425

Quinine Sulphate, AR

CAS: 6119-70-6
Formula: C₄₀H₅₄N₄O₁₀S
MW: 782.9 g/mol

ZX-019426

Quinine sulphate, AR ≥99.5%

CAS: 6119-20-6
Formula: (C₂₀H₂₄N₂O₂)₂.H₂SO_4.2H₂O
MW: 782.96 g/mol

ZX-019598

Quinine sulphate, GR 99%+

CAS: 207671-44-1
Formula: C₄₀H₅₄N₄O₁₀S
MW: 782.9 g/mol

ZX-002954

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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