Grade guide
ACS Grade chemicals
Reagents that meet the specifications of ACS Reagent Chemicals, published by the American Chemical Society, for demanding analytical work.
138 ACS Grade products
Sodium tetraborate decahydrate ACS reagent, ≥99.5%
- CAS
- 1303-96-4
- Formula
- B4H20Na2O17
- MW
- 381.4 g/mol
VQ-014242
Sodium thiosulphate, pentahydrate, IP/BP/USP/EP/Ph. Eur., ACS, AR
- CAS
- 10102-17-7
- Formula
- H10Na2O8S2
- MW
- 248.19 g/mol
VQ-047269
tri-Sodium citrate, dihydrate, IP/BP/USP/EP/Ph. Eur., ACS, AR
- CAS
- 6132-04-3
- Formula
- C6H9Na3O9
- MW
- 294.1 g/mol
VQ-047255
Xylenol orange tetrasodium salt, ACS reagent
- CAS
- 3618-43-7
- Formula
- C31H28N2Na4O13S
- MW
- 760.58 g/mol
VQ-000736
FAQs
Who sets ACS grade specifications?
The American Chemical Society publishes them in Reagent Chemicals, a compendium of monographs giving purity requirements and test methods for laboratory reagents.
Is ACS grade better than AR grade?
Not always purer, but more standardised. ACS refers to published limits, while AR limits are set by each manufacturer.
Can ACS grade be used as a pharmaceutical ingredient?
No. ACS is a reagent standard. Ingredients in medicines should meet the relevant pharmacopoeial monograph with appropriate regulatory documentation.
Other grades
HPLC GradeGC GradeAR Grade (Analytical Reagent)LR Grade (Laboratory Reagent)Extra Pure GradeMolecular Biology GradeSpectroscopy GradeLC-MS GradeIP Grade (Indian Pharmacopoeia)BP Grade (British Pharmacopoeia)USP Grade (United States Pharmacopeia)Ph. Eur. Grade (European Pharmacopoeia)Food Grade (FCC)Technical GradeElectronic GradeDeuterated & Stable-Isotope-Labelled CompoundsPharmaceutical Secondary Reference Standards
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