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

1,345–1,368 of 1,435 products

Thorin, GR

CAS: 3688-92-4
Formula: C₁₆H₁₁AsN₂Na₂O₁₀S₂
MW: 576.3 g/mol

ZX-000412

Thorium nitrate, GR 99%+

CAS: 14767-04-5
Formula: H₁₀N₄O₁₇Th
MW: 570.13 g/mol

ZX-017721

Thorium oxide, AR

CAS: 1314-20-1
Formula: O₂Th
MW: 264.04 g/mol

ZX-037165

Thymidine, AR >99%

CAS: 50-89-5
Formula: C₁₀H₁₄N₂O₅
MW: 242.23 g/mol

ZX-037480

Thymol blue solution, IP/BP/EP, ACS, AR

CAS: 76-61-9
Formula: C₂₇H₃₀O₅S
MW: 466.6 g/mol

ZX-038757

Thymol blue, GR

CAS: 76-61-9
Formula: C₂₇H₃₀O₅S
MW: 466.6 g/mol

ZX-000414

Thymolphthalein, GR

CAS: 125-20-2
Formula: C₂₈H₃₀O₄
MW: 430.5 g/mol

ZX-000723

Thymolphthaleine complexon

CAS: 1913-93-5
Formula: C₃₈H₄₄N₂O₁₂
MW: 720.8 g/mol

ZX-000416

Tin granular, GR 99%+

CAS: 7440-31-5
Formula: Sn
MW: 118.71 g/mol

ZX-015976

Tin powder, 325 mesh GR 99.9%

CAS: 7440-31-5
Formula: Sn
MW: 118.71 g/mol

ZX-015291

Tiron, GR

CAS: 149-45-1
Formula: C₆H₄Na₂O₈S₂
MW: 314.2 g/mol

ZX-000417

Titan yellow

CAS: 1829-00-1
Formula: C₂₈H₂₁N₅NaO₆S₄
MW: 674.8 g/mol

ZX-000725

Titanium dioxide, GR 99%+

CAS: 13463-67-7
Formula: O₂Ti
MW: 79.87 g/mol

ZX-014060

Titanium dioxide, USP, AR

CAS: 13463-67-7
Formula: O₂Ti
MW: 79.87 g/mol

ZX-038758

Titanium foil, 0.002 mm thick, AR ≥99.5%

CAS: 7440-32-6
Formula: Ti
MW: 47.87 g/mol

ZX-038423

Toluene 3,4-dithiol, GR 99%+

CAS: 496-74-2
Formula: C₇H₈S₂
MW: 156.3 g/mol

ZX-010058

Toluene, AR, specially dried 99.5%

CAS: 108-88-3
Formula: C₇H₈
MW: 92.14 g/mol

ZX-037016

Toluene, GR 99%+

CAS: 108-88-3
Formula: C₇H₈
MW: 92.14 g/mol

ZX-001830

trans-1,2-Diaminocyclohexane-N,N,N',N'-tetra acetic acid (cdta) ur universal reagent passes, AR

CAS: 123333-90-4
Formula: C₁₄H₂₂N₂O₈
MW: 346.33 g/mol

ZX-019682

trans-1,2-Diaminocyclohexane-N,N,N′,N′-tetraacetic acid, monohydrate, GR 99%

CAS: 13291-61-7
Formula: C₁₄H₂₂N₂O₈
MW: 346.33 g/mol

ZX-000419

tri-Ammonium citrate, GR 98%+

CAS: 3458-72-8
Formula: C₆H₁₇N₃O₇
MW: 243.22 g/mol

ZX-003131

tri-Lithium citrate, GR 99%+

CAS: 6080-58-6
Formula: C₆H₁₃Li₃O₁₁
MW: 282.1 g/mol

ZX-013320

tri-Sodium arsenate dodecahydrate

CAS: 13510-46-8
Formula: AsH₂₄Na₃O₁₆
MW: 424.07 g/mol

ZX-019523

tri-Sodium citrate, dihydrate, GR 99%+

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

ZX-003132

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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