Carboxymethylcellulose Powder cmc Methylcellulose - 1000g

Carboxymethylcellulose (CMC) Powder

Other Names: Sodium carboxymethyl cellulose, Cellulose gum, CMC-Na
Chemical Formula (approximate repeating unit): [C₆H₇O₂(OH)₂CH₂COONa]ₙ
CAS Number: 9004-32-4
Appearance: White to off-white, odorless, free-flowing powder

Carboxymethylcellulose is a water-soluble cellulose derivative used primarily as a thickener, stabilizer, binder, and film-former in a wide variety of technical and industrial applications. It is produced by the reaction of cellulose with chloroacetic acid in an alkaline medium.

Chemical and Physical Properties

• Molar Mass: Variable (polymeric compound)

• Density: ~0.6–0.9 g/cm³ (bulk)

• Solubility: Soluble in cold and hot water

• pH (1% solution): Typically 6.5–8.5

• Viscosity: Highly variable depending on grade (from low to very high viscosity options)

• Thermal Stability: Stable up to ~200°C in dry form

• Decomposition: Gradual above 200°C; carbonization at higher temperatures

Applications

• Paints and Coatings: Functions as a rheology modifier and stabilizer.

• Ceramics and Refractories: Used as a binder and suspension agent.

• Textiles: Serves as a thickener for printing pastes and dye baths.

• Paper Industry: Used in surface sizing and as a coating agent.

• Adhesives: Improves texture, water retention, and adhesion properties.

• Construction Materials: Applied as an additive in plasters and cement to improve workability and water retention.

• Polymers and Resins: Acts as a dispersant or film-forming agent.

Safety

This chemical does not meet GHS hazard criteria for 97.3% (1711 of 1758) of all reports. Pictograms displayed are for 2.7% (47 of 1758) of reports that indicate hazard statements.

Handling and Storage

• Handling: Avoid creating airborne dust. Use dust extraction or respiratory protection during bulk processing.

• Storage: Store in a dry, cool, well-ventilated area in tightly sealed packaging. Protect from moisture and high humidity.

Environmental Considerations

Not considered hazardous to the environment in normal quantities. Biodegradable under proper conditions. Prevent large releases into water systems due to potential for increasing turbidity and viscosity.