| Category | English Name | Abbreviation | International Common Name | Identifier Code |
|---|---|---|---|---|
| Chemical Name | Sodium Hydroxide | NaOH | Caustic Soda | CAS No.: |
| Product Form | Caustic Soda Pearls / Beads | CSP | Lye (for solution form) | EINECS No.: 215-185-5 |
| Subtype | Micropearls / Coarse Pearls | - | PELS® (Brand-specific Pearls) | UN No.: 1823 (Class 8 Corrosive Substance) |
| Customs Code | - | - | - | HS Code: 2815120000 |
| Index | Premium Grade | First Grade | Test Method |
|---|---|---|---|
| NaOH Purity | ≥99.0% | ≥98.5% | Acidimetric Titration |
| Sodium Carbonate (Na₂CO₃) | ≤0.5% | ≤0.8% | Gas Phase Stripping Method |
| Sodium Chloride (NaCl) | ≤0.03% | ≤0.05% | Argentometric Titration |
| Iron(III) Oxide (Fe₂O₃) | ≤0.005% | ≤0.008% | Spectrophotometry |
| Appearance | White spherical pearls, odorless | Highly hygroscopic, easy to deliquesce if exposed to air | Visual Inspection |
| Particle Size | Micropearls: ~0.7mm; Coarse Pearls: 1-3mm | Similar to washing powder particles, good fluidity | Sieving Method |
| Property | Value/Description |
|---|---|
| Physical Form | White solid pearls, uniform spherical shape, excellent fluidity, low dust, anti-caking |
| Solubility | Highly soluble in water,exothermic strongly during dissolution, aqueous solution is strongly alkaline (pH > 14) |
| Hygroscopicity | Extremely high; absorbs moisture quickly and deliquesces when exposed to air, requiring sealed packaging |
| Melting Point/Boiling Point | 318.4℃ / 1390℃, good thermal stability |
| Density | 2.13g/cm³, high bulk density, better packaging efficiency than flake caustic soda |
| Advantage | Description |
|---|---|
| Operational Safety | Low dust, reducing the risk of respiratory irritation |
| Precise Metering | Uniform particles, easy to control by automatic feeding systems |
| Storage Stability | Strong anti-caking property, long shelf life |
| Good Mixability | Mixes uniformly with other materials, high reaction efficiency |
| Industry | Application | Market Demand Characteristics |
|---|---|---|
| Detergent/Soap | Neutralizing fatty acids, manufacturing surfactants | High demand in Southeast Asia and the Middle East, preference for pearl form |
| Paper/Celulose | Cooking liquor preparation, lignin removal | High-end markets in North America and Europe, requiring low impurities |
| Water Treatment | pH adjustment, heavy metal precipitation | Growing global environmental protection demand, increasing food-grade applications |
| Petrochemical | Deacidification in refining process, catalyst preparation | Stable demand in oil-producing regions such as the Middle East and Russia |
| Food Processing | Peeling, cleaning, pH adjustment | Compliance with FDA/EU food additive standards (e.g., E524) required |
| Item | Specification |
|---|---|
| Standard Packaging | 25kg laminated paper bags (leak-proof and moisture-proof); customizable pallet packaging (20-27 tons/20ft container) |
| Transportation Notes | Mark UN1823, avoid mixed transportation with acidic substances, keep dry and ventilated |
| Requirement | Details |
|---|---|
| Safety Document | Provide MSDS/SDS (in line with GHS standards) |
| EU Access | Complete REACH registration |
| Food-Grade Application | Pass FDA/EFSA certification |
| Packaging Labeling | Mark corrosive warning signs and safety operation instructions |
