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Overview

Hazards Summary | At room temperature, sodium hydroxide is a white crystalline odorless solid that absorbs moisture from the air. It is a manufactured substance. When dissolved in water or neutralized with acid it liberates substantial heat, which may be sufficient to ignite combustible materials. Sodium hydroxide is very corrosive. It is generally used as a solid or a 50% solution. Other common names include caustic soda and lye. Sodium hydroxide is used to manufacture soaps, rayon, paper, explosives, dyestuffs, and petroleum products. It is also used in processing cotton fabric, laundering and bleaching, metal cleaning and processing, oxide coating, electroplating, and electrolytic extracting. It is commonly present in commercial drain and oven cleaners.

Chinese name
Sodium hydroxide
English name
Sodium hydroxide
Chinese alias
Caustic soda, liquid | HEMHJVSKTPXQMS-UHFFFAOYSA-M | Na (O H) | Sodium hydroxide, granular | Caustic soda, dry | Sodium hydroxide (Na2(OH)2) | Caustic soda, solid | Hydroxyde de sodium | SODIUM HYDROXIDE [HSDB] | sodiumhydroxid | Caswell No. 773 | Sodium
English alias
Caustic soda, liquid | HEMHJVSKTPXQMS-UHFFFAOYSA-M | Na (O H) | Sodium hydroxide, granular | Caustic soda, dry | Sodium hydroxide (Na2(OH)2) | Caustic soda, solid | Hydroxyde de sodium | SODIUM HYDROXIDE [HSDB] | sodiumhydroxid | Caswell No. 773 | Sodium
CAS number
1310-73-2
Molecular formula
HNaO
Molar mass
39.997
Update date
2026-10-19

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