Sodium Hydroxide, also known as caustic soda or lye, is a highly versatile inorganic compound widely used across chemical, industrial, and manufacturing sectors. With the CAS number 1310-73-2, sodium hydroxide is recognized as one of the most essential bulk chemicals in global production and trade.
Chemical Profile of Sodium Hydroxide
Chemical Formula: NaOH
CAS Number: 1310-73-2
Molecular Weight: 39.997 g/mol
Appearance: White solid (pellets, flakes, granules) or colorless solution
Solubility: Highly soluble in water, exothermic dissolution
pH: Strongly alkaline
As a strong alkali, sodium hydroxide reacts vigorously with acids and is highly corrosive to organic tissues and many metals. Its reactivity underpins its wide range of industrial applications.
Production of Sodium Hydroxide
Sodium hydroxide is primarily manufactured via the chlor-alkali process, in which sodium chloride (NaCl) brine is electrolyzed to produce chlorine, hydrogen, and sodium hydroxide. This method ensures large-scale, cost-effective production, making NaOH readily available worldwide.
Industrial Applications
Sodium hydroxide 1310-73-2 plays a crucial role in multiple industries:
1. Chemical Manufacturing
Used as a key reagent in producing solvents, plastics, synthetic fibers, dyes, and detergents.
Essential for neutralization and saponification reactions.
2. Pulp & Paper Industry
Integral in the Kraft process for pulping wood and separating lignin from cellulose.
Enhances bleaching and paper strength.
3. Textile Industry
Utilized in fabric scouring, mercerization, and dyeing processes.
Improves luster, strength, and absorbency of cotton fibers.
4. Water Treatment
Adjusts pH levels and removes heavy metals from wastewater.
Used in municipal and industrial water treatment plants.
5. Food Industry
Regulated use in food processing, such as cocoa and chocolate production, soft drink bottling, and peeling of fruits/vegetables.
Functions as a pH stabilizer and cleaning agent.
6. Soap and Detergent Manufacturing
Central to the saponification process, converting fats and oils into soap.
Basis for many household and industrial cleaning agents.
Safety and Handling
Due to its highly caustic nature, sodium hydroxide requires strict safety measures:
Wear protective gloves, goggles, and clothing.
Store in tightly closed containers away from acids and moisture.
Avoid direct skin, eye, and respiratory contact.
Proper handling is essential to prevent chemical burns, corrosion, and environmental hazards.
Global Market Insights
Sodium hydroxide is classified as a high-volume commodity chemical, with global demand exceeding 80 million metric tons annually. Major consumption is driven by:
Asia-Pacific (China, India) due to textile and chemical industries.
North America and Europe for pulp & paper and water treatment.
Sustainability trends and stricter environmental regulations are also influencing NaOH applications in greener chemical processes.
Conclusion
Sodium Hydroxide (CAS 1310-73-2) is an indispensable industrial alkali with extensive applications in chemicals, paper, textiles, water treatment, food, and detergents. As global industries continue to expand, the demand for high-quality, cost-effective sodium hydroxide is expected to remain strong, positioning it as a cornerstone of modern chemical manufacturing.