Sodium hydroxide
CAS 1310-73-2HNaO39.997 g/mol
Sodium hydroxide is an alkali metal hydroxide.
IUPAC: sodium hydroxide
PubChem
Physical & Chemical Properties
| Melting Point | 604 °F (USCG, 1999) |
| Boiling Point | greater than 266 °F at 760 mmHg (USCG, 1999) |
| Density | 1.5 at 68 °F (USCG, 1999) - Denser than water; will sink |
| Solubility | 111 % (NIOSH, 2024) |
| Vapor Pressure | 0 mmHg (approx) (NIOSH, 2024) |
| pH | Strongly alkaline (1 % solution) |
| Appearance | Sodium hydroxide solution appears as a colorless liquid. More dense than water. Contact may severely irritate skin, eyes, and mucous membranes. Toxic by ingestion. Corrosive to metals and tissue. |
Data: PubChem · Last updated: 4/20/2026
GHS Classification
Danger
Pictograms
⚗️
Corrosion
Corrosive to metals, skin, eyes
GHS05
Hazard Statements
H314Causes severe skin burns and serious eye damage
Precautionary Statements
P280Wear protective gloves/protective clothing/eye protection/face protection
P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes
Hazard Classes
Skin corrosion — Cat. 1A
ECHA Classification & Labelling Inventory · Last updated: 4/20/2026
Regulatory Compliance
TSCA
Listed
note: Status based on EPA TSCA Active Inventory · inventory name: TSCA Chemical Substance Inventory
View sourceGlobal Trade Intelligence
No trade flow data available for this chemical.
HS Code(s): 2815
Data: UN Comtrade
Suppliers on Chem-Exchange
No suppliers currently listing Sodium hydroxide
List Your ProductsSafety Data Sheets
No SDS documents available
Upload an SDS document