Grade guide
AR Grade (Analytical Reagent) chemicals
Analytical Reagent grade: high-purity chemicals with specified maximum limits for individual impurities, suitable for quantitative analysis.
1,434 AR Grade (Analytical Reagent) products
1,2-Naphthoquinone-4-sulphonic acid sodium salt, GR 99%+
- CAS
- 521-24-4
- Formula
- C10H5NaO5S
- MW
- 260.2 g/mol
VQ-010740
FAQs
Is AR grade the same as GR grade?
Broadly, yes. Both describe high-purity analytical reagents with defined impurity limits, but specifications are set by each manufacturer, so compare the actual limits.
Is AR grade the same as ACS grade?
Not necessarily. ACS grade must meet the published ACS Reagent Chemicals specification. Many AR products meet or approach it, but only products tested to ACS can be labelled ACS.
Can AR grade be used in pharmaceutical manufacture?
AR grade is intended for analysis. Materials used in medicines should be of pharmacopoeial grade with appropriate regulatory documentation.
Other grades
HPLC GradeGC GradeACS GradeLR 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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