Description Catalogue Number 800004 Synonyms Ethanal, Acetic Aldehyde, Ethyl Aldehyde Product Information CAS number 75-07-0 EC index number 605-003-00-6 EC number 200-836-8 Hill Formula C₂H₄O Chemical formula CH₃CHO Molar Mass 44.05 g/mol HS Code 2912 12 00 Structure formula Image Applications Application Acetaldehyde for synthesis. CAS No. 75-07-0, EC Number 200-836-8. Physicochemical Information Boiling point 20.4 °C (1013 hPa) Density 0.78 g/cm3 (20 °C) Explosion limit 4 - 57 %(V) Flash point -20 °C Ignition temperature 140 °C Melting Point -123 °C pH value 5 (10 g/l, H₂O, 20 °C) Vapor pressure 1006 hPa (20 °C) Safety Information according to GHS Hazard Pictogram(s) Hazard Statement(s) H224: Extremely flammable liquid and vapour. H319: Causes serious eye irritation. H335: May cause respiratory irritation. H351: Suspected of causing cancer. Precautionary Statement(s) P210: Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking. P240: Ground/bond container and receiving equipment. P305 + P351 + P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. P308 + P313: IF exposed or concerned: Get medical advice/ attention. P403 + P233: Store in a well-ventilated place. Keep container tightly closed. RTECS AB1925000 Storage class 3 Flammable liquids WGK WGK 1 slightly water endangering Safety Information Hazard Symbols Harmful Highly Flammable Categories of danger extremely flammable, irritant, carcinogenic R Phrase R 12-36/37-40 Extremely flammable.Irritating to eyes and respiratory system.Limited evidence of a carcinogenic effect. S Phrase S 16-33-36/37 Keep away from sources of ignition - No smoking.Take precautionary measures against static discharges.Wear suitable protective clothing and gloves. Storage and Shipping Information Storage Store at +2°C to +8°C. Transport Information Declaration (railroad and road) ADR, RID UN 1089 , 3, I Declaration (transport by air) IATA-DGR UN 1089 , 3, I Declaration (transport by sea) IMDG-Code UN 1089 , 3, I Specifications Assay (GC, area%) ≥ 99.0 % (a/a) Density (d 5°C/ 4°C) 0.798 - 0.801