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| HS Code | 335842 |
| Chemical Name | Sodium Hydroxide |
| Common Names | Caustic Soda, Lye |
| Chemical Formula | NaOH |
| Molar Mass | 39.997 g/mol |
| Appearance | White, odorless solid |
| Melting Point | 318°C |
| Boiling Point | 1,388°C |
| Density | 2.13 g/cm³ (solid) |
| Solubility In Water | 111 g/100 mL (20°C) |
| Ph Of Solution | Very alkaline, pH ≈ 14 (for concentrated solutions) |
| Cas Number | 1310-73-2 |
| Hazard Classification | Corrosive |
As an accredited Sodium Hydroxide factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Sodium Hydroxide, 500g, is packaged in a sturdy, sealed HDPE plastic bottle with a child-resistant cap and clear hazard labeling. |
| Shipping | Sodium hydroxide is shipped in tightly sealed containers made of compatible materials such as plastic or steel drums, totes, or tanks. Shipping must comply with hazardous material regulations, including labeling and documentation, due to its corrosive nature. Adequate ventilation, spill containment, and protective equipment are required during transport to ensure safety. |
| Storage | Sodium hydroxide should be stored in tightly closed, corrosion-resistant containers, such as those made from polyethylene or stainless steel. Store in a cool, dry, well-ventilated area away from acids, flammable materials, and moisture. Clearly label containers and keep them secure to prevent accidental spills. Avoid exposing to aluminum, zinc, or tin, as sodium hydroxide reacts with these metals. |
Sodium hydroxide plays a pivotal role in key industrial sectors, serving as a foundational reagent in demanding production environments. With stringent quality controls and precise formulation requirements, it contributes to reliable, large-scale outputs across several downstream application fields. Below, we detail eight verified and significant use cases, specifying industry regulations, inclusion ratios, process points, and representative final products.
Our sodium hydroxide satisfies rigorous demands of pulp and paper mills for lignin removal, fiber pulp purifying, and pH control during chemical pulping and bleaching. Mills integrate this alkali at stage-specific points to ensure fiber integrity, whiteness, and environmental discharge compliance. Operators depend on clearly defined dosing based on wood species, pulping method, and pulp brightness targets.
Industry compliance standards
Typical usage ratio
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Final product types
Bauxite refineries utilize sodium hydroxide in high-temperature digestion phases of the Bayer process, dissolving aluminum-bearing minerals while leaving impurities largely insoluble. Process engineers monitor concentration and purity grades to minimize contamination and ensure controlled precipitation downstream. Reagent loading depends on ore composition and plant throughput, consistently reviewed with process analytics.
Industry compliance standards
Typical usage ratio
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Sodium hydroxide provides the core saponification reactant for converting triglycerides or fatty acids into bar and liquid soaps. Detergent manufacturers use it in controlled alkali-catalyzed reactions to optimize fatty acid conversion and manage free alkali in finished goods. Quality control labs monitor both stoichiometric balance and by-product removal, assuring compliance with international hygiene and safety norms.
Industry compliance standards
Typical usage ratio
Downstream process integration
Final product types
Water treatment facilities incorporate this material primarily for pH control, heavy metal precipitation, and neutralization of acidic waste streams, especially in potable water, industrial effluent, and municipal wastewater circuits. Formulation and dosing are precision-controlled via real-time sensors to maintain safety and meet statutory discharge limits, with close documentation for auditing and traceability.
Industry compliance standards
Typical usage ratio
Downstream process integration
Final product types
Textile plants use sodium hydroxide in mercerization lines to enhance fiber strength, dye affinity, and luster in cotton and viscose processing. Dye manufacturers apply it to control chromophore formation and adjust pH during colorant synthesis. Dosing and recovery cycles depend on fabric construction, batch size, and targeted dye lot shade consistency, monitored by in-process controls and effluent management requirements.
Industry compliance standards
Typical usage ratio
Downstream process integration
Final product types
Chlor-alkali plants and downstream petrochemical producers employ sodium hydroxide for epichlorohydrin manufacture via the saponification/hydrolysis of 1,3-dichloropropane intermediates. Facilities manage process alkali purity and strength to maximize yield while limiting by-product formation. Strict controls oversee reagent introduction, recovery, and re-processing streams as part of integrated chlorinated organics operations.
Industry compliance standards
Typical usage ratio
Downstream process integration
Final product types
Within the biodiesel sector, sodium hydroxide enables neutralization and impurity removal during crude glycerol refining, post-transesterification. Refiners adjust applied alkali in washing and separation steps for precise phase splitting, meeting technical glycerol standards for further downstream use in chemicals, pharma, or food applications. Online characterization maintains product consistency and compliance.
Industry compliance standards
Typical usage ratio
Downstream process integration
Final product types
Edible oil refineries apply sodium hydroxide during alkali refining of crude vegetable oils, removing free fatty acids, pigments, and gums, ensuring clarity and safety for human consumption. Operators precisely monitor caustic concentration and residence time to achieve tight free acid specifications and compliance with food safety legislation, while optimizing oil yield and minimizing waste soapstock.
Industry compliance standards
Typical usage ratio
Downstream process integration
Final product types
Competitive Sodium Hydroxide prices that fit your budget—flexible terms and customized quotes for every order.
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Tel: +8615371019725
Email: admin@sinochem-nanjing.com
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