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

121–138 of 138 products

Sodium sulphate, ACS reagent, ≥99%

CAS: 7757-82-6
Formula: Na₂O₄S
MW: 142.04 g/mol

ZX-013292

Sodium sulphite ACS reagent, ≥99.5%

CAS: 7757-83-7
Formula: Na₂O₃S
MW: 126.05 g/mol

ZX-013296

Sodium tetraborate decahydrate ACS reagent, ≥99.5%

CAS: 1303-96-4
Formula: B₄H₂₀Na₂O₁₇
MW: 381.4 g/mol

ZX-013300

Sodium thiosulphate, pentahydrate, IP/BP/USP/EP/Ph. Eur., ACS, AR

CAS: 10102-17-7
Formula: H₁₀Na₂O₈S₂
MW: 248.19 g/mol

ZX-038748

Strontium nitrate, ACS grade, 99%

CAS: 10042-76-9
Formula: N₂O₆Sr
MW: 211.63 g/mol

ZX-013554

Tannic acid ACS reagent grade, powder or solid

CAS: 1401-55-4
Formula: C₇₆H₅₂O₄₆
MW: 1701.2 g/mol

ZX-010653

Tetramethylammonium bromide, ACS, AR

CAS: 64-20-0
Formula: C₄H₁₂BrN
MW: 154.05 g/mol

ZX-038316

Thiourea, ACS reagent, ≥99%

CAS: 62-56-6
Formula: CH₄N₂S
MW: 76.12 g/mol

ZX-010055

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

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

ZX-038757

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

Trichloroacetic acid ACS reagent, ≥99%

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

ZX-007711

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

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

ZX-038761

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

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

ZX-038763

Urea ACS reagent, 99.0-100.5%

CAS: 57-13-6
Formula: CH₄N₂O
MW: 60.06 g/mol

ZX-008132

Xylenol orange tetrasodium salt, ACS reagent

CAS: 3618-43-7
Formula: C₃₁H₂₈N₂Na₄O₁₃S
MW: 760.58 g/mol

ZX-000736

Xylenol orange tetrasodium salt, EP/Ph. Eur., ACS, AR

CAS: 3618-43-7

ZX-038775

Zinc acetate dihydrate ACS reagent, ≥98%

CAS: 5970-45-6
Formula: C₂H₆O₃Zn
MW: 143.4 g/mol

ZX-017498

Zinc chloride, ACS, AR, specially dried ≥98.00%

CAS: 7646-85-7
Formula: Cl₂Zn
MW: 136.3 g/mol

ZX-037162

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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