Sodium Hydroxide 99% (Caustic Soda Flake)
99% High Purity – Stable 99.0%-99.5% NaOH with low impurities for efficient, pollution-free reactions.
Ultra-low Impurity – Low chloride & iron content to avoid equipment corrosion and upgrade product quality.
Fast Full Dissolution – Uniform flakes dissolve fully without residue, saving time and energy costs.
Consistent Batch Quality – ISO & SGS certified, stable quality with zero batch difference.
Moisture & Caking Resistant – Double-layer packaging prevents deliquescence for long-distance shipping.
Wide Application – Ideal for water treatment, textile, soap, paper, petroleum and fine chemical industries.
Complete Documents – UN1823 compliant, full COA, MSDS & SGS reports for smooth customs clearance.
Factory Direct Supply – Sufficient stock, flexible MOQ, custom packaging and competitive bulk price.
Product Overview
99% Caustic Soda Flake, also chemically named Sodium Hydroxide (NaOH CAS:1310-73-2)is high-purity solid strong alkali manufactured via mature chlor-alkali electrolysis process, featured with minimum 99.0% NaOH content, low sodium carbonate & chloride impurities, uniform white flaky appearance and fast water dissolution with heat release. As one of the most essential bulk inorganic chemicals globally, our premium grade caustic soda flakes satisfy strict quality demands from medium & large-scale manufacturers across textile, pulp & paper, water treatment, petrochemical, soap making and food processing industries. We supply bulk wholesale worldwide with customizable packaging and full third-party inspection documents to support importers, industrial factories and chemical distributors for stable raw material procurement.
Detailed Technical Specification
| Item | Standard Index (Industrial Grade GB/T209-2018) | Remark |
|---|---|---|
| Sodium Hydroxide (NaOH) | ≥99.0% | Core purity guarantee, typical value 99.2%~99.5% |
| Sodium Carbonate (Na₂CO₃) | ≤0.40% | Low carbonate avoids extra by-product during chemical reaction |
| Sodium Chloride (NaCl) | ≤0.03% | Low chloride protects stainless steel production equipment from corrosion |
| Ferric Oxide (Fe₂O₃) | ≤0.005% | Trace iron content for high-end synthesis & food auxiliary use |
| Appearance | White semi-transparent solid flakes | No lump, no yellow impurity |
| Molecular Formula | NaOH | Molecular Weight:39.997 g/mol |
| Melting Point | 318.4℃ | Boiling Point:1390℃, Density:2.13g/cm³ |
| CAS Number | 1310-73-2 | Global universal chemical registration code |
| HS Code | 28151100 | Customs clearance standard code |
| UN Dangerous Goods No. | UN1823 | Solid caustic soda international transport code |
Core Product Advantages
- ✅ Strict purity control ≥99% NaOH, stable batch-to-batch quality, effectively reduce raw material waste and finished product disqualification rate for downstream production
- ✅ Low impurity formula (low salt & iron), applicable for high-standard food auxiliary, pharmaceutical intermediate and fine chemical synthesis besides regular industrial usage
- ✅ Optimized flake thickness design: rapid complete dissolution in room-temperature water without residual sediment, save production mixing time & energy cost
- ✅ Anti-moisture inner PE liner + outer woven bag double packaging, greatly reduce deliquescence & caking risk during long-distance sea/land transportation
- ✅ Flexible MOQ & packing options: 25kg standard bag, 500kg/1000kg jumbo bulk bag, support container full-load bulk shipment for global wholesale
- ✅ Factory direct sales without middleman markup, stable monthly output above thousands of metric tons to fulfill long-term framework order for overseas buyers
Main Industrial Applications
1. Water Treatment Industry (Top consumption market 2026)
Used for industrial & municipal wastewater pH adjustment, heavy metal precipitation removal, boiler water softening and acid waste liquid neutralization; high-purity 99% lye flakes avoid extra impurity pollution in purified water production.
2. Textile & Garment Manufacturing
Core raw material for cotton mercerization to improve fabric gloss, tensile strength & dye absorption; also for fabric desizing, scouring and printing waste water alkaline treatment, widely purchased by Southeast Asia, Middle East textile factories.
3. Soap & Detergent Production
Saponification core alkali to turn animal/vegetable oil into solid soap, raw material for laundry detergent, liquid soap and industrial degreaser manufacturing; 99% purity ensures stable saponification rate and finished soap hardness.
4. Pulp & Paper Mill
Break down lignin from wood fiber in kraft pulping process, bleach raw pulp for white paper production, critical alkali for waste paper deinking regeneration.
5. Petroleum Refining & Petrochemical
Remove sulfur and acidic impurities from crude oil via alkaline washing, produce petroleum additives and various organic chemical intermediates.
6. Other Industries
Alumina smelting, food processing (fruit peeling, cocoa/chocolate production), industrial equipment degreasing, pharmaceutical raw material synthesis, paint & coating production.
Packaging & Shipment Details
1. Available Packing Specification
1. Standard:25kg PE inner bag + PP woven outer bag, pallet loading optional (40 bags per pallet)
2. Bulk option: 500kg / 1000kg FIBC jumbo bag for large-scale factory bulk purchase
2. Storage Requirements
Store in cool, dry, well-ventilated warehouse; keep bags tightly sealed to prevent deliquescence from airborne moisture & CO₂; separate storage from strong acid, edible goods and oxidants; avoid rain & damp during stacking.
3. Shipping Information
UN1823 Class 8 corrosive goods, compliant with IMDG sea transport rules; major loading ports: Qingdao/Tianjin/Shanghai China, door-to-door delivery available for most countries; MSDS & dangerous goods shipping document provided for customs clearance.
Safety Operation Guidance
Caustic soda is highly corrosive strong alkali: wear rubber glove, safety goggle and acid-resistant apron during weighing & dissolution; in case skin/eye splash, flush with large amount of clean running water for minimum 15 mins and seek medical treatment immediately; never add water into solid flakes directly to avoid high-temperature alkali splash caused by drastic exothermic dissolution.
FAQ Section
Q1: What is the difference between 99% caustic soda flake and pearl caustic soda?
A: Flake NaOH dissolves faster with bigger contact area, cost-effective for bulk mixing usage; pearl caustic soda owns lower hygroscopicity for fine chemical automatic feeding, our factory supplies both two forms upon client demand.
Q2: Can your 99% sodium hydroxide flake apply for food grade processing?
A: We supply two sub-grades: regular industrial grade for common manufacturing & food-contact qualified 99.3% high purity grade with food safety certificate for food auxiliary processing.
Q3: What’s your minimum order quantity?
A: MOQ starts from 1MT for trial order; full 20GP/40GP FCL bulk price discount for regular long-term contract clients.
Q4: Can you provide customized COA & third-party inspection report?
A: Yes, SGS/BV test report and batch COA are free supplied before shipment as buyer’s requirement.
Purchase Inquiry CTA
Send your target quantity, destination port and required grade via email/WhatsApp, our chemical engineer team will offer competitive factory quotation and detailed product datasheet (TDS & MSDS) within 24 working hours.