Sodium Carboxymethyl Cellulose (CMC), is an organic substance that appears as white fibrous or granular powder. It is odorless, tasteless and hygroscopic. It is easily dispersed in water to form a transparent colloidal solution. It is widely used as sizing agent for textile printing and dyeing, water-soluble colloidal tackifier for daily chemical products, thickener for food industry, adhesive for ceramic industry, industrial paste, sizing agent for paper industry, etc.
Packaging & Transportation
I. Basic Information
1. Chemical Properties
Chemical Name: Sodium carboxymethyl cellulose
Molecular Formula: [C₆H₇O₂(OH)₂OCH₂COONa]ₙ
CAS No.: 9004-32-4
Degree of Substitution (DS): 0.2-1.5 (0.6-0.9 for industrial grade)
Polymerization Degree: 200-1000
2. Physical Properties
| Parameter | Specification |
|---|---|
| Appearance | White to off-white powder |
| Solubility | Cold water soluble (requires stirring) |
| Viscosity (1% solution) | 5-10,000 mPa·s (varies by grade) |
| pH (1% solution) | 6.5-8.5 |
| Thermal Stability | ≤80°C (prolonged) |
3. Chemical Properties
Anionic water-soluble polymer
Salt tolerance: Affected by multivalent ions
Forms gels with polyvalent cations
Biodegradable
II. Application Scenarios
1. Food Industry (E466)
Primary Functions:
Thickener
Stabilizer
Water retention agent
Typical Applications:
Ice cream (prevents ice crystals)
Dairy products (texture improvement)
Baked goods (shelf-life extension)
Condiments (suspension stability)
2. Pharmaceutical
Main Uses:
Tablet binder
Sustained-release matrix
Eye drop thickener
Application Cases:
Tablet coating
Ointment base
Artificial tears
3. Personal Care
Functional Properties:
Viscosity control
Suspension stability
Film-forming
Product Applications:
Toothpaste (texture enhancer)
Shampoo (thickener)
Face masks (film former)
4. Industrial Uses
Major Applications:
Oil drilling (mud additive)
Textile printing (sizing agent)
Papermaking (strength enhancer)
Ceramics (binder)
III. Technical Specifications
| Grade | Purity | DS Range | Viscosity Range |
|---|---|---|---|
| Food | ≥99.5% | 0.7-0.9 | 300-800 mPa·s |
| Pharma | ≥99.8% | 0.8-1.0 | 100-1000 mPa·s |
| Industrial | ≥98% | 0.6-1.2 | 5-10,000 mPa·s |
IV. Safety Specifications
Food Grade Standard: GB 1886.232-2016
ADI: 0-25 mg/kg bw (JECFA)
Storage: Dry, sealed, room temperature
Biosafety: Non-toxic, non-irritating
Note: Viscosity values vary significantly by product grade and concentration.
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