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Solvent

Chemical Grades and Their Criteria

Chemicals are classified based on purity and intended application. Below are the most common grades used in laboratories, manufacturing, and research:

Grade	Description & Typical Use	Purity
ACS Grade	Meets or exceeds the standards of the American Chemical Society. Suitable for high-purity analytical work.	≥ 95–99.9%
Reagent Grade (AR)	Similar to ACS; suitable for precise laboratory and analytical applications.	≥ 95–99.9%
USP/NF Grade	Complies with U.S. Pharmacopeia (USP) or National Formulary (NF) standards. Used in pharmaceuticals and healthcare.	≥ 95%
Food Grade	Safe for human consumption. Must meet FDA or USDA regulations.	≥ 95%
Laboratory Grade	Used in educational labs or general experiments. May contain impurities.	~85–95%
Technical Grade	Used in industrial processes where high purity is not required.	~70–90%
Industrial Grade	For large-scale industrial use; may contain significant impurities.	Not strictly defined
Electronic Grade	Extremely high purity required for semiconductors and electronics.	≥ 99.999% (5N to 9N)
HPLC/GC Grade	Solvents for high-performance liquid chromatography (HPLC) or gas chromatography (GC).	Ultra-high purity
Spectrophotometric Grade	Free of UV/Vis/IR interfering substances; used in optical analysis.