Home › Chemicals › Sodium Hypochlorite CAS 7681-52-9: Sodium Hypochlorite (NaClO) Identity CAS Number 7681-52-9 Molecular Formula NaClO IUPAC Name sodium hypochlorite Molecular Weight 74.44 g/mol SMILES [Na+].[O-]ClSynonyms bleach, liquid bleach, chlorinated soda, NaOCl
2D Structure
Physical Properties Density 1.21 g/mL at 25°C Boiling Point 101.0°C Melting Point -16.0°C Flash Point None°C Vapor Pressure 2.3 kPa at 20°C Refractive Index nD = 1.386 Dielectric Constant ε = 25.0
Safety & GHS Classification GHS03 GHS05 Irritant
H272: May intensify fire; oxidizer H314: Causes severe skin burns and eye damage H331: Toxic if inhaled H335: May cause respiratory irritation H400: Very toxic to aquatic life Storage: Store in cool, well-ventilated area. Decomposes in sunlight and heat — keep containers tightly sealed. NEVER mix with acids (releases deadly chlorine gas) or ammonia (produces chloramine gas). Household bleach is typically 5-6% NaOCl.
Material Compatibility Matrix Plastics Material Rating PTFE Excellent PVC Excellent PE Good PP Excellent PEEK Good PVDF Excellent
Rubbers Material Rating Viton Good NBR Fair EPDM Excellent Silicone Good FKM Good
Metals Material Rating Stainless 316 Fair Aluminum Poor Copper Poor Brass Poor
Applications Water disinfection and treatment Household bleach and cleaning Laundry whitening Textile bleaching Swimming pool sanitation Dairy and food processing sanitation Endodontic irrigant (dentistry) Chemical warfare agent decontamination External References: PubChem
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