Sodium Hydroxide (NaOH)
CAT No.: ASC-1061
CAS Number: 1310-73-2
Molecular Formula: NaOH
Molar Mass: 40.00 g/mol
 
Overview
Sodium hydroxide, commonly known as caustic soda or lye, is a highly versatile and widely used inorganic compound. In its pure form, it appears as a white, odorless, crystalline solid that readily absorbs moisture from the air (hygroscopic). When dissolved in water, it forms a strongly alkaline solution, making it a fundamental reagent in various chemical processes.
 
Physical and Chemical Properties
Appearance: White, crystalline solid
Melting Point: 318°C (604°F)
Boiling Point: 1,388°C (2,530°F)
Density: 2.13 g/cm³ at 20°C
Solubility: Highly soluble in water, releasing substantial heat upon dissolution (exothermic reaction)
pH: Approximately 14 in aqueous solution
 
 
Applications
Sodium hydroxide's strong alkaline nature lends itself to a multitude of applications across various industries:
Chemical Manufacturing: Used in the production of various chemicals, including sodium salts, detergents, and synthetic dyes.
Paper and Pulp Industry: Essential in the pulping and bleaching processes.
Textile Industry: Employed in the processing of cotton fabric and dyeing processes.
Water Treatment: Utilized to adjust pH levels and remove heavy metals from water.
Soap and Detergent Production: A key ingredient in saponification, the chemical reaction that produces soap.
Food Industry: Used for peeling fruits and vegetables, chocolate and cocoa processing, and soft drink processing.
 
Safety and Handling
Sodium hydroxide is a highly caustic substance that can cause severe burns upon contact with skin or eyes and can be harmful if inhaled or ingested. Proper safety measures should always be followed:
Personal Protective Equipment (PPE): Wear appropriate gloves, protective clothing, and eye/face protection.
Handling: Always add sodium hydroxide to water—never the reverse—to prevent violent reactions.
Storage: Store in a cool, dry, well-ventilated area away from incompatible substances such as acids and organic materials.
For detailed safety information, please refer to the Safety Data Sheet (SDS).
 
Packaging and Availability
Available in various grades and packaging sizes to meet your specific requirements. For bulk orders or custom packaging solutions, please contact our sales team.