Sodium Hydroxide (CAS#1310-73-2) Market Overview

Industrial Applications

Paper Industry:
Caustic soda is essential in the production of paper and cellulose pulp. It facilitates the swelling and breakdown of cellulose fibers, thereby improving paper strength, brightness, and overall product quality.

Textile and Dyeing Industry:
In textile processing, sodium hydroxide is widely used for desizing, scouring, and mercerization. It effectively removes impurities and residual pigments from cotton fibers, enhancing fabric softness, whiteness, and surface luster.

Chemical Industry:
Sodium hydroxide serves as a fundamental raw material in the manufacture of chemicals such as borax, sodium cyanide, formic acid, oxalic acid, and phenol. It is also commonly employed as a basic reagent in chemical analysis and synthesis.

Petroleum Industry:
In petroleum refining, caustic soda is utilized to eliminate acidic components and sulfides. It also plays a role in regulating pH levels and viscosity in drilling fluids used in oilfield operations.

Metallurgical Industry:
During aluminum production, sodium hydroxide is used to dissolve bauxite. In zinc and copper processing, it is applied for surface treatment to remove oxide layers and oil contaminants.

Daily Life Applications

Cleaning Products:
Sodium hydroxide is a key ingredient in soaps and detergents, where it reacts with fats through saponification. It is also widely used in household cleaners, such as oven and drain cleaners, to remove grease, scale, and stubborn deposits.

Food Industry:
Food-grade caustic soda is employed as an acid neutralizer, a peeling agent for fruits like citrus and peaches, and a cleaning agent for bottles and cans. It is additionally used for deodorization and decolorization processes.

Other Applications

Environmental Protection:
Caustic soda is applied in the treatment of acidic wastewater, exhaust gases, and contaminated soil. It neutralizes acidic substances, reduces hazardous components, decomposes organic matter, and absorbs pollutants from flue gases.

Pharmaceutical Industry:
In pharmaceutical manufacturing, sodium hydroxide is used to produce intermediates and active raw materials. It also functions as a solubilizing agent, enhancing drug solubility and bioavailability.

Latest Research Trends

Production Technology:
On December 12, 2024, Shandong Ocean Shipping Co., Ltd. obtained a patent for a “marine solid caustic soda liquefaction device,” designed to address storage safety, leakage prevention, and waste reduction during maritime transport.

Environmental Protection Research:
Recent innovations involve integrating caustic soda with biotechnology, catalytic processes, and membrane technologies to improve efficiency in water and exhaust gas treatment while reducing environmental impact. Examples include microbial-assisted wastewater treatment and photocatalytic exhaust purification using nanomaterials.

New Energy Applications:
Sodium hydroxide is being studied as an electrolyte additive in lithium-ion batteries to enhance performance, lower internal resistance, improve charge–discharge efficiency, and extend battery life. It is also used in the preparation of alkaline ion-exchange membranes for fuel cells, improving conductivity and chemical stability.

Materials Research:
Ongoing studies focus on enhancing cellulose dissolution at low temperatures by incorporating hydrogen-bond acceptors into caustic soda solutions, supporting the development of cellulose-based packaging films.

Safety and Protection

Caustic soda is highly corrosive. Direct contact with skin or mucous membranes can cause severe tissue damage, and eye exposure may result in serious injury to the cornea and deeper eye structures. Appropriate personal protective equipment, including gloves, goggles, and protective clothing, must be worn during handling.

Storage and Transportation

Sodium hydroxide should be stored in a dry, well-ventilated environment, away from heat sources and incompatible substances such as acids. During transportation, packaging must remain intact to prevent leakage and ensure safe handling.