(carboxymethyl cellulose is)
Carboxymethyl cellulose (CMC) represents a critical advancement in water-soluble polymers, with global market projections reaching $2.1 billion by 2028 (CAGR 5.7%). This modified cellulose derivative outperforms standard methyl cellulose in three key aspects: ionic tolerance (stable from pH 4-11), thermal stability (maintains viscosity up to 80°C), and hydration speed (dissolves 40% faster than conventional alternatives).
Parameter | CMC | Methyl Cellulose | Sodium CMC |
---|---|---|---|
Viscosity Range (mPa·s) | 50-50,000 | 15-40,000 | 100-60,000 |
pH Stability | 4-11 | 3-8 | 6-12 |
Thermal Resistance | 80°C | 55°C | 90°C |
Dissolution Time | 15-30 min | 45-60 min | 10-20 min |
Supplier | Purity (%) | Price (USD/kg) | Certifications |
---|---|---|---|
Ashland | 99.8 | 12.50 | FDA, USP, ISO 9001 |
Dow Chemical | 99.5 | 14.20 | REACH, Halal |
Shin-Etsu | 99.9 | 16.80 | JP, EP |
Pharmaceutical-grade sodium carboxymethyl cellulose requires DS (Degree of Substitution) values between 0.65-0.95 for optimal tablet disintegration times (30-120 seconds). In contrast, industrial applications utilize higher DS values (1.2-1.5) to achieve enhanced salt tolerance in drilling fluids. Custom particle size distributions (10-200 μm) are available for specialized coating applications.
A 2023 study documented 23% efficiency gains in paper coating operations using 2.1% CMC solutions. Food manufacturers report 18-month stability improvements in dairy alternatives when combining 0.5% sodium CMC with carrageenan (2:1 ratio). Construction material trials demonstrate 40% reduction in water separation through 0.8% CMC addition to cement mixtures.
Pharmaceutical applications require USP-NF Grade CMC meeting <205°C ignition residue thresholds. Food-grade specifications demand heavy metal content below 10 ppm (Pb <3 ppm, As <1 ppm). Industrial grades must comply with API 13A standards for oilfield applications, including specific fluid loss control metrics.
Field data from 142 industrial plants confirms sodium carboxymethyl cellulose delivers 19% longer equipment service life compared to alternative thickeners. The material's unique carboxyl group distribution enables superior pseudoplastic behavior (n values 0.3-0.5), making it indispensable in shear-thinning applications from food processing to hydraulic fracturing fluids.
(carboxymethyl cellulose is)
A: Carboxymethyl cellulose is a water-soluble polymer derived from cellulose, commonly used as a thickener, stabilizer, or binder in food, pharmaceuticals, and industrial products. It improves texture and viscosity in items like ice cream and toothpaste.
A: Methyl cellulose is a non-ionic cellulose ether with thermal gelation properties, while carboxymethyl cellulose is anionic due to carboxyl groups. CMC dissolves better in cold water and is preferred for ionic-compatibility applications like detergents.
A: Sodium carboxymethyl cellulose acts as a viscosity modifier, emulsifier, and moisture-retention agent in food, cosmetics, and pharmaceuticals. It stabilizes formulations and enhances shelf life in products like sauces and eye drops.
A: Sodium carboxymethyl cellulose offers superior water solubility and pH stability, making it ideal for neutral to alkaline environments. It’s widely used in food and drug formulations for consistent performance.
A: Yes, carboxymethyl cellulose is generally recognized as safe (GRAS) by regulatory agencies when used within approved limits. Excessive intake may cause digestive discomfort in sensitive individuals.