Home › Chemicals › Formaldehyde CAS 50-00-0: Formaldehyde (CH2O) Identity CAS Number 50-00-0 Molecular Formula CH2O IUPAC Name methanal Molecular Weight 30.03 g/mol SMILES C=OSynonyms methanal, formalin (aqueous), methyl aldehyde, HCHO
2D Structure
Physical Properties Density 0.815 g/mL at 25°C Boiling Point -19.0°C Melting Point -92.0°C Flash Point -19.0°C Vapor Pressure 388.0 kPa at 20°C Refractive Index nD = 1.376 Dielectric Constant ε = 84.0
Safety & GHS Classification Flammable GHS06 Health Hazard
H225: Highly flammable liquid and vapor H301: Toxic if swallowed H311: Toxic in contact with skin H331: Toxic if inhaled H317: May cause an allergic skin reaction H350: May cause cancer H341: Suspected of causing genetic defects Storage: Store as aqueous solution (formalin, 37% w/w) with methanol stabilizer. Known human carcinogen (nasopharyngeal cancer). Use in fume hood with full PPE. Keep away from ignition sources and strong oxidizers. Pungent irritating odor.
Material Compatibility Matrix Plastics Material Rating PTFE Excellent PVC Good PE Good PP Good PEEK Excellent PVDF Good
Rubbers Material Rating Viton Good NBR Good EPDM Good Silicone Good FKM Good
Metals Material Rating Stainless 316 Excellent Aluminum Good Copper Fair Brass Fair
Applications Resin manufacturing (urea-formaldehyde, phenol-formaldehyde) Preservative and disinfectant Textile finishing Embalming fluid Particle board and plywood adhesive Fertilizer production Pharmaceutical intermediate Automotive component manufacturing External References: PubChem
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