Chemical Additives

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Sodium hydroxide CAS 1310-73-2 NaOH CSP

Product Characteristics

The core advantages of granulated caustic soda compared to flake caustic soda: ✅ Safe operation

Product Details of Caustic Soda Pearls (Sodium Hydroxide)

1. Basic Information

Category	English Name	Abbreviation	International Common Name	Identifier Code
Chemical Name	Sodium Hydroxide	NaOH	Caustic Soda	CAS No.: 1310-73-2
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

2. Technical Specifications (Industrial Grade 99%)

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

3. Physicochemical Properties

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

4. Core Advantages & Application Fields

4.1 Core Advantages vs 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

4.2 Global Application Markets

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

5. Packaging & Logistics

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

6. Compliance Requirements (For International Market Access)

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

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