Home › Chemicals › Acetonitrile CAS 75-05-8: Acetonitrile (C2H3N) Identity CAS Number 75-05-8 Molecular Formula C2H3N IUPAC Name acetonitrile Molecular Weight 41.05 g/mol SMILES CC#NSynonyms methyl cyanide, cyanomethane, MeCN, ACN
2D Structure
Physical Properties Density 0.786 g/mL at 25°C Boiling Point 81.6°C Melting Point -45.7°C Flash Point 2.0°C Vapor Pressure 9.7 kPa at 20°C Refractive Index nD = 1.344 Dielectric Constant ε = 36.6
Safety & GHS Classification Flammable Irritant
H225: Highly flammable liquid and vapor H302: Harmful if swallowed H312: Harmful in contact with skin H319: Causes serious eye irritation H332: Harmful if inhaled Storage: Store in cool, well-ventilated area away from ignition sources. Metabolized to hydrogen cyanide in the body — seek medical attention if ingested. Use in fume hood.
Material Compatibility Matrix Plastics Material Rating PTFE Excellent PVC Poor PE Good PP Good PEEK Excellent PVDF Good
Rubbers Material Rating Viton Good NBR Poor EPDM Good Silicone Fair FKM Good
Metals Material Rating Stainless 316 Excellent Aluminum Good Copper Good Brass Good
Applications HPLC mobile phase solvent (most common use) Pharmaceutical synthesis Lithium-ion battery electrolyte Extraction solvent in DNA synthesis Pesticide manufacturing Photographic chemicals Petroleum refining extraction UV spectroscopy solvent External References: PubChem
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