Does ACS grade mean the material was tested by the American Chemical Society?

No. The ACS publishes the specifications but does not test or certify products. The manufacturer tests the lot against the monograph and declares conformity on its COA.

Is every chemical available in ACS grade?

No. ACS monographs cover a few hundred common reagents. If a chemical has no ACS monograph, it cannot be sold as ACS grade, and an AR or reagent grade with a manufacturer's specification is the usual alternative.

Can an ACS reagent replace a pharmacopoeial grade in a formulation?

No. ACS grade is a laboratory reagent specification. Ingredients for medicines need a pharmacopoeial grade and suitable manufacturing controls, regardless of how pure an ACS reagent may be.

Chemical grade

ACS Grade chemicals

Reagents that meet the published monographs of ACS Reagent Chemicals, a public standard for analytical reagent purity.

138 products in this grade

ACS Grade products

73–96 of 138 products

Lithium perchlorate, ACS, AR ≥95.00%

CAS: 7791-03-9
Formula: ClLiO₄
MW: 106.4 g/mol

ZX-019513

Magnesium chloride hexahydrate ACS reagent, 99.0-102.0%

CAS: 7791-18-6
Formula: Cl₂H₁₂MgO₆
MW: 203.3 g/mol

ZX-013480

Magnesium chloride hexahydrate, IP/BP/USP/EP/Ph. Eur., ACS, AR 99.0%

CAS: 7791-18-6
Formula: Cl₂H₁₂MgO₆
MW: 203.3 g/mol

ZX-037690

Magnesium sulphate, IP/BP/USP/EP/Ph. Eur., ACS, AR

CAS: 10034-99-8
Formula: H₁₄MgO₁₁S
MW: 246.48 g/mol

ZX-038659

Mercuric chloride, EP, ACS, AR

CAS: 7487-94-7
Formula: Cl₂Hg
MW: 271.5 g/mol

ZX-038675

Mercury(II) chloride ACS reagent, ≥99.5%

CAS: 7487-94-7
Formula: Cl₂Hg
MW: 271.5 g/mol

ZX-014011

meta-Phosphoric acid ACS reagent, chips, 33.5-36.5%

CAS: 37267-86-0
Formula: HO₃P
MW: 79.98 g/mol

ZX-000888

Methanol, ACS, AR 99.8%

CAS: 67-56-1
Formula: CH₄O
MW: 32.04 g/mol

ZX-037077

Methyl orange, ACS reagent, dye content 85%

CAS: 547-58-0
Formula: C₁₄H₁₄N₃NaO₃S
MW: 327.34 g/mol

ZX-000622

Methyl red ACS reagent, crystalline

CAS: 493-52-7
Formula: C₁₅H₁₅N₃O₂
MW: 269.3 g/mol

ZX-000625

Methyl red sodium salt, ACS

CAS: 845-10-3
Formula: C₁₅H₁₅N₃NaO₂
MW: 292.29 g/mol

ZX-038262

Methyl red, EP/Ph. Eur., ACS

CAS: 493-52-7
Formula: C₁₅H₁₅N₃O₂
MW: 269.3 g/mol

ZX-038682

N-(1-Naphthyl)ethylenediamine dihydrochloride ACS reagent, 99%+

CAS: 1465-25-4
Formula: C₁₂H₁₆Cl₂N₂
MW: 259.17 g/mol

ZX-008543

Naphthol green B, ACS, AR

CAS: 19381-50-1
Formula: C₃₀H₁₅FeN₃Na₃O₁₅S₃
MW: 878.5 g/mol

ZX-038266

Nitric Acid 60-68%, ACS, AR 65%

CAS: 7697-37-2
Formula: HNO₃
MW: 63.01 g/mol

ZX-037011

Palladium chloride, ACS, AR

CAS: 7647-10-1
Formula: Cl₂Pd
MW: 177.32 g/mol

ZX-038022

PAR, indicator, ACS ≥90.00%

CAS: 16593-81-0
Formula: C₁₁H₁₀N₃NaO₃
MW: 255.2 g/mol

ZX-037082

PAR, indicator, EP/Ph. Eur., ACS

CAS: 16593-81-0
Formula: C₁₁H₁₀N₃NaO₃
MW: 255.2 g/mol

ZX-038724

Phenol red sodium salt, indicator, ACS

CAS: 34487-61-1
Formula: C₁₉H₁₃NaO₅S
MW: 376.4 g/mol

ZX-037310

Phosphorous pentoxide, powder, ACS reagent, 99%

CAS: 1314-56-3
Formula: O₅P₂
MW: 141.94 g/mol

ZX-000925

Phthalic anhydride anhydrous, ACS, AR 99.00–100.20%

CAS: 85-44-9
Formula: C₈H₄O₃
MW: 148.11 g/mol

ZX-038318

Potassium bicarbonate, ACS

CAS: 298-14-6
Formula: CHKO₃
MW: 100.11 g/mol

ZX-037075

Potassium bromate, ACS reagent, ≥99.8%

CAS: 7758-01-2
Formula: BrKO₃
MW: 167 g/mol

ZX-013052

Potassium chromate ACS reagent, ≥99%

CAS: 7789-00-6
Formula: CrK₂O₄
MW: 194.19 g/mol

ZX-013070

Compare with other grades

HPLC Grade GC Grade AR Grade (Analytical Reagent)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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