Sodium Hydroxide

Sodium Hydroxide is a highly caustic metallic base with the chemical formula HNaO and CAS number 1310-73-2. It has a molecular weight of 39.997 g/mol and is classified as a corrosive substance (Skin Corr. 1A). This inorganic compound is one of the most widely used industrial chemicals, known for its strong alkaline properties and ability to neutralize acids completely.

Sodium Hydroxide is a white, odorless solid at room temperature that appears as pellets, flakes, or powder. It is highly hygroscopic, readily absorbing moisture from air, and is extremely soluble in water, generating significant heat during dissolution. The substance is also soluble in alcohols and glycerol but insoluble in organic solvents like acetone and ether.

Sodium Hydroxide is primarily used in chemical manufacturing, pulp and paper production, soap and detergent manufacturing, and water treatment processes. It serves as a key ingredient in aluminum production, textile processing, food processing (as a cleaning agent), and petroleum refining. Additionally, it's essential for pH adjustment in various industrial processes and as a drain cleaner in maintenance applications.

Sodium Hydroxide requires extreme caution during handling due to its corrosive nature (Skin Corr. 1A classification). Essential PPE includes chemical-resistant gloves, safety goggles, face shields, and protective clothing. Work in well-ventilated areas, avoid contact with skin and eyes, and never add water directly to concentrated sodium hydroxide. Always have eyewash stations and safety showers readily accessible in work areas.

Sodium Hydroxide must be stored in a cool, dry place in tightly sealed containers to prevent moisture absorption. Use corrosion-resistant containers made of steel or appropriate plastics. Keep away from acids, metals like aluminum and zinc, and organic materials. Ensure adequate ventilation in storage areas and maintain temperatures below 40°C to prevent decomposition and container damage.

Sodium Hydroxide contact requires immediate action due to its corrosive properties. For skin contact, immediately flush with copious amounts of water for at least 20 minutes while removing contaminated clothing. For eye contact, rinse continuously with clean water for 15-20 minutes. If inhaled, move to fresh air immediately. Seek medical attention promptly in all cases of exposure.

Sodium Hydroxide disposal must comply with local environmental regulations and waste management laws. Small quantities can be neutralized carefully with dilute acid under controlled conditions before disposal. Large quantities require professional hazardous waste disposal services. Never discharge untreated sodium hydroxide into sewers or waterways. Contact licensed waste management companies for proper disposal procedures and documentation.

Sodium Hydroxide is classified as ADR Class 8 (corrosive substances) with Packing Group II, indicating moderate danger level. Transportation requires appropriate corrosive material placarding, proper packaging in UN-approved containers, and compliance with dangerous goods regulations. Drivers must possess ADR certification, and vehicles need appropriate emergency equipment. Shipping documentation must include proper shipping names and hazard classifications.

Sodium Hydroxide is regulated under CLP Regulation with hazard pictogram GHS05 and signal word 'Danger'. It requires safety data sheets under REACH regulation but is not classified as an SVHC (Substance of Very High Concern). Industrial users must comply with workplace safety regulations, proper labeling requirements, and employee training protocols for corrosive substance handling.

Sodium Hydroxide is available through OYSI, a specialized European chemical distributor offering professional-grade industrial chemicals. OYSI provides comprehensive technical support, proper documentation, and reliable supply chains across European markets. As a professional distributor, OYSI ensures compliance with all regulatory requirements and provides detailed safety data sheets and certificates of analysis for industrial customers.