Product Details of Caustic Soda Flakes (Sodium Hydroxide)
This document provides a structured overview of caustic soda flakes, tailored for international marketing, exhibition promotion, and overseas customer communication.
1. Basic Information
| Category |
English Name |
Abbreviation |
International Common Name |
Core Identifier Codes |
| Chemical Name |
Sodium Hydroxide |
NaOH |
Caustic Soda |
CAS No.: 1310-73-2
EINECS No.: 215-185-5 |
| Product Form |
Caustic Soda Flakes |
CSF |
Flake Lye |
UN No.: 1823 (Class 8 Corrosive Substance) |
| Customs Declaration |
- |
- |
- |
HS Code: 2815110000 (Industrial Grade) |
| Product Subtype |
Thin Flakes / Thick Flakes |
- |
Technical Grade Flakes |
- |
2. Technical Specifications (Industrial Grade)
| Index |
Premium Grade (99%) |
First Grade (98.5%) |
Standard Grade (98%) |
Test Method |
| NaOH Purity |
≥99.0% |
≥98.5% |
≥98.0% |
Acidimetric Titration |
| Sodium Carbonate (Na₂CO₃) |
≤0.5% |
≤0.8% |
≤1.0% |
Gas Phase Stripping Method |
| Sodium Chloride (NaCl) |
≤0.03% |
≤0.05% |
≤0.08% |
Argentometric Titration |
| Iron(III) Oxide (Fe₂O₃) |
≤0.005% |
≤0.008% |
≤0.01% |
Spectrophotometry |
| Appearance |
White thin flakes, no visible impurities |
White flakes, slight trace impurities |
White to light yellow flakes |
Visual Inspection |
| Flake Thickness |
0.1–0.3mm |
0.3–0.5mm |
0.5–1.0mm |
Micrometer Measurement |
3. Physicochemical Properties
| Property |
Value / Description |
| Physical Form |
White translucent flakes, smooth surface, uniform thickness, easy to stack and store |
| Solubility |
Highly soluble in water, violent exothermic reaction during dissolution; soluble in ethanol and glycerol |
| Hygroscopicity |
Strongly hygroscopic, deliquesces quickly when exposed to air; absorbs CO₂ in air to form Na₂CO₃ |
| Melting Point / Boiling Point |
318.4℃ / 1390℃ |
| Density |
2.13g/cm³; bulk density 0.8–1.0g/cm³ |
| Corrosiveness |
Strongly corrosive to skin, metals, and glass; reacts with acids to produce salt and water |
4. Core Advantages & Application Fields
4.1 Core Advantages vs Caustic Soda Pearls
| Advantage |
Description |
| Cost-Effective |
Lower production and packaging cost, suitable for large-scale industrial procurement |
| High Bulk Density |
High stacking density, reduces storage and transportation costs per unit weight |
| Easy Dissolution Control |
Flake structure dissolves more gradually than pearls, reducing local overheating risk |
| Mature Production Process |
Stable quality, consistent supply, widely recognized in global markets |
4.2 Global Application Markets
| Industry |
Key Applications |
Market Demand Characteristics |
| Textile & Dyeing |
Fiber mercerization, dye neutralization, wastewater treatment |
High demand in South Asia and Southeast Asia; requires low-iron content |
| Soap & Detergent |
Saponification reaction with fats and oils to produce soap and surfactants |
Prefer 98% grade for cost control |
| Metallurgy |
Ore beneficiation, metal surface cleaning, aluminum oxide production |
Stable demand in North America and Europe; strict impurity requirements |
| Chemical Synthesis |
Production of sodium salts, organic intermediates, rubber regeneration |
High demand for 99% premium grade; requires batch consistency |
| Water Treatment |
pH adjustment, heavy metal ion precipitation, sewage neutralization |
Growing demand in emerging markets; requires compliance with local environmental standards |
5. Packaging & Logistics
| Item |
Specification |
| Standard Packaging |
25kg laminated kraft paper bags (moisture-proof, leak-proof); 500kg/1000kg bulk bags |
| Container Loading |
20ft container: 25–27 tons (25kg bags); 20–22 tons (bulk bags) |
| Transportation Notes |
1. Mark UN1823 and corrosive hazard signs on packages
2. Avoid mixed transportation with acids, ammonium salts, and food
3. Transport in dry, ventilated vehicles; prevent rain and moisture |
| Storage Requirements |
Store in sealed warehouses; keep away from moisture and acidic gases; shelf life: 12 months under sealed conditions |
6. Compliance Requirements for International Market Access
| Region / Standard |
Key Requirements |
| Global |
Provide GHS-compliant MSDS/SDS; mark hazard warnings in local languages |
| EU |
Complete REACH registration; comply with CLP regulation for labeling |
| North America |
Meet FDA standards for food-grade applications (E524); comply with OSHA regulations |
| ASEAN / Middle East |
Comply with local customs import inspection standards; provide product certification |
