Home › Chemicals › Potassium Hydroxide CAS 1310-58-3: Potassium Hydroxide (KOH) Identity CAS Number 1310-58-3 Molecular Formula KOH IUPAC Name potassium hydroxide Molecular Weight 56.11 g/mol SMILES [K+].[OH-]Synonyms caustic potash, potash lye, KOH
2D Structure
Physical Properties Density 2.044 g/mL at 25°C Boiling Point 1327.0°C Melting Point 360.0°C Flash Point None°C Vapor Pressure 0.0 kPa at 20°C Refractive Index nD = 1.409 Dielectric Constant ε = 200.0
Safety & GHS Classification GHS05 Irritant
H302: Harmful if swallowed H314: Causes severe skin burns and eye damage H290: May be corrosive to metals Storage: Store in airtight containers — extremely hygroscopic. Dissolution in water is very exothermic. More soluble in alcohol than NaOH. Keep away from acids and organic materials. PPE required.
Material Compatibility Matrix Plastics Material Rating PTFE Excellent PVC Good PE Good PP Excellent PEEK Excellent PVDF Excellent
Rubbers Material Rating Viton Good NBR Fair EPDM Good Silicone Good FKM Good
Metals Material Rating Stainless 316 Good Aluminum Poor Copper Poor Brass Poor
Applications Soap manufacturing (soft soaps) Fertilizer production Battery electrolyte (alkaline batteries) Biodiesel production (catalyst) Chemical manufacturing Food processing (cocoa alkalization) Semiconductor etching External References: PubChem
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