High-grade 99 sodium hydroxide (99% caustic soda) engineered for demanding industrial processing, chemical synthesis, and water treatment applications. As an established global exporter, we supply premium-purity 99% anhydrous sodium hydroxide in both flake and prilled pearl forms, delivering maximum alkalinity, rapid dissolution rates, and zero organic contamination.
Produced in ISO-certified chemical manufacturing facilities, our 99 sodium hydroxide undergoes continuous quality testing to guarantee minimal moisture absorption, low sodium carbonate (Na2CO3) buildup, and ultra-low trace iron content. These strict standards ensure maximum yield in soap saponification, pulp and paper digestion, alumina refining, and textile processing.
We offer reliable, heavy-duty hazardous material packaging, including 25kg woven polypropylene bags with inner polyethylene moisture barriers and 1,000kg jumbo totes. Backed by complete global safety documentation (MSDS/SDS) and batch-specific Certificates of Analysis (COA), our supply chain delivers factory-direct consistency to your port of choice. Contact our sales desk today for sample requests, technical documentation, and competitive volume tier quotes.
| Specification Parameter | Standard Requirement | Typical Result |
| Purity Assay (NaOH) | ≥99.0% | 99.4% |
| Sodium Carbonate (Na2CO3) | ≤0.5% | 0.22% |
| Sodium Chloride (NaCl) | ≤0.03% | 0.012% |
| Iron (Fe) | ≤0.005% | 0.002% |
| Appearance | Pure White Solid | Pass |
Core Product Advantages
Uncompromising 99% Purity: Manufactured via advanced membrane-cell electrolysis to ensure a concentrated ≥ 99% assay with minimal trace impurities (NaCl, Na2CO3, and heavy metals). This high chemical potency guarantees rapid, complete stoichiometric reactions, eliminating unwanted side reactions, cloudy precipitates, or unreacted raw material waste in sensitive manufacturing formulas.
Rapid Exothermic Dissolution: Dissolves swiftly and completely in both cold and hot water while releasing significant thermal energy (an exothermic reaction). This self-generated heat accelerates reaction kinetics, speeds up mixing cycles, reduces external boiler energy costs, and shortens overall batch processing times in industrial blending tanks.
Hermetic Moisture Protection: Packaged in heavy-duty, double-layer sealed bags featuring a thick high-density polyethylene (HDPE) inner liner. This airtight, moisture-proof barrier shields the strongly hygroscopic material from ambient humidity and atmospheric carbon dioxide (CO2) absorption, preventing premature hydration, caking, and loss of chemical activity during long-distance ocean freight and warehouse storage.
Low Dust & Superior Free-Flowing Behavior: Engineered into uniform, dust-free prilled pearls and thin, consistent flakes with optimized bulk density. The smooth particle structure prevents mechanical clumping, protects operational staff from airborne dust inhalation, and enables seamless pneumatic feeding into automated hopper systems, batching scales, and mixing vats.
Consistent Quality & Global Traceability: Produced under ISO-certified quality management systems to ensure reliable batch-to-batch repeatability. Each shipment is fully documented with a comprehensive Safety Data Sheet (SDS) and a batch-specific Certificate of Analysis (COA), allowing full regulatory compliance and seamless integration into automated production lines.
Primary Industrial Applications
Soap & Detergent Manufacturing: Serves as the fundamental saponification reagent (lye) to chemically convert triglycerides, animal fats, and vegetable oils into high-grade solid bar soaps, liquid cleansers, laundry detergents, and heavy-duty industrial degreasers with predictable bar hardness and lather performance.
Pulp, Paper & Packaging Industry: Essential in the Kraft pulping process, where it acts as a primary cooking chemical to digest raw wood chips, dissolve unwanted lignin binders, and separate high-strength cellulose fibers required for manufacturing paperboard, corrugated packaging, and fine writing papers.
Water Treatment & Environmental Neutralization: Functions as a primary alkaline dosing agent in municipal water purification plants and industrial effluent treatment facilities. It accurately regulates pH levels, neutralizes corrosive acidic wastewater streams, and precipitates toxic heavy metal ions (Fe3+, Cu2+, Pb2+, Zn2+) for safe filtration and environmental discharge compliance.
Alumina & Metal Refining: Applied extensively in the Bayer process within the metallurgical sector, where concentrated caustic solutions dissolve crude bauxite ore under elevated temperatures and pressures to extract pure alumina (Al2O3), the vital raw material precursor for aluminum metal smelting.
Textile Processing & Mercerization: Widely utilized in natural fiber processing for cotton mercerization, fabric scouring, and dye bath preparation. The treatment swells natural cotton fibers, significantly enhancing fabric tensile strength, dimensional stability, surface sheen, and color absorption capacity.

