Sodium Carboxymethyl Cellulose (CAS No. 9004-32-4)
1. Basic Information
Chemical Name: Sodium carboxymethyl cellulose
Synonyms: CMC; Cellulose gum; Carmellose sodium
CAS Number: 9004-32-4
Molecular Formula: [C₆H₇O₂(OH)ₓ(OCH₂COONa)ᵧ]ₙ
Molecular Weight: Variable (typically 90,000–700,000 g/mol)
Appearance: White to cream-colored powder
Odor: Odorless
Substitution Degree (DS): 0.6–1.0 (commercial grades)
2. Physical and Chemical Properties
Melting Point: Decomposes before melting (~260°C/500°F)
Density: 0.5–0.7 g/cm³ (bulk density)
Solubility:Water: Forms viscous colloidal solutionOrganic solvents: Insoluble in ethanol, acetone, ether
pH (1% solution): 6.5–8.5
Viscosity (1% solution): 5–10,000 mPa·s (depends on grade)
Moisture Content: ≤10% (as supplied)
3. Hazards (GHS Classification)
Acute Toxicity: Not classified (Hazard statements generally not required)
Skin/Eye Irritation: May cause mild irritation (H315/H319)
Inhalation Risk: Dust may cause respiratory irritation (H335)
Environmental Impact: Not hazardous (H420 not applicable)
NFPA Rating: Health 1, Flammability 1, Reactivity 0
4. Storage and Handling
Storage:Keep in tightly sealed containersStore in cool (<30°C), dry conditionsProtect from moisture caking
Handling:Use dust mask (NIOSH N95) when handling powderSafety goggles recommended for bulk handling
5. Applications
Food Industry: Thickener (E466), stabilizer in ice cream/sauces
Pharmaceuticals: Tablet binder, viscosity modifier in syrups
Personal Care: Toothpaste thickener, shampoo viscosity agent
Industrial: Paper coating, textile sizing, oil drilling fluid additive
Disclaimer:
The above content is for reference and communication only among industry insiders, and does not guarantee its accuracy or completeness. According to relevant laws and regulations and the regulations of this website, units or individuals who purchase related items should obtain valid qualifications and qualification conditions.
Declaration: The products displayed on this website are intended exclusively for industrial applications or scientific research. They are not intended for medical, pharmaceutical, or food use. In accordance with applicable laws and regulations, purchasing organizations must hold valid qualifications and approvals.
