Overview
Sodium Hydroxide (98.5%), often referred to as caustic soda or lye, is a highly versatile and widely used industrial chemical. It is a strong base with significant applications across various industries, including water treatment, chemical manufacturing, and cleaning processes. The 98.5% purity grade is particularly favored for its high effectiveness in neutralizing acids and breaking down organic materials. This compound is typically produced through the electrolysis of sodium chloride (salt) and is available in various forms, such as flakes, pellets, or solutions. Its high alkalinity makes it a critical component in many industrial processes, though it requires careful handling due to its corrosive nature.
Physical and Chemical Properties
Sodium Hydroxide (98.5%) is characterized by its white, crystalline appearance in solid form. It has a high melting point of 318°C and a boiling point of 1,388°C, making it stable under most industrial conditions. The compound is highly soluble in water, releasing significant heat during dissolution, which is an exothermic reaction. Its strong alkaline nature (pH ~14 in solution) allows it to readily react with acids, producing salts and water. Additionally, it is hygroscopic, meaning it absorbs moisture from the air, which can lead to caking if not stored properly. These properties make it both highly effective and potentially hazardous if mishandled.
Main Applications
One of the primary uses of Sodium Hydroxide (98.5%) is in water treatment, where it is employed to adjust pH levels and neutralize acidic wastewater. It is also a key ingredient in the production of various chemicals, such as sodium hypochlorite (bleach) and sodium salts. In the pulp and paper industry, it is used to break down lignin in wood, facilitating the production of paper. The soap and detergent industry relies on it for saponification, the process of converting fats into soap. Additionally, it serves as a cleaning agent in industrial settings, effectively removing grease and organic deposits from equipment and surfaces.
Safety and Storage
Due to its highly corrosive nature, Sodium Hydroxide (98.5%) requires strict safety measures during handling and storage. Workers must wear protective gear, including gloves, goggles, and acid-resistant clothing, to prevent skin and eye contact. Inhalation of dust or fumes should be avoided, as it can cause respiratory irritation. Storage areas must be cool, dry, and well-ventilated, with containers tightly sealed to prevent moisture absorption. The chemical should be kept away from acids and incompatible materials, such as aluminum and zinc, to avoid hazardous reactions. Spills should be neutralized with weak acids, such as vinegar, and cleaned up immediately.
B2B Procurement Guide
When procuring Sodium Hydroxide (98.5%), B2B buyers should prioritize suppliers with a proven track record of quality and safety compliance. Key factors to consider include purity levels (verified through certificates of analysis), packaging integrity (to prevent moisture exposure), and transportation conditions (to avoid contamination or degradation). Bulk purchases often offer cost advantages, but buyers should ensure proper storage facilities are available. It is also advisable to establish long-term contracts with reliable suppliers to secure consistent quality and pricing. Additionally, buyers should stay informed about regional regulations and safety standards to ensure compliance in their operations.
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