Carboxymethyl cellulose (CMC) or cellulose gum is a cellulose derivative with carboxymethyl groups (-CH2-COOH) bound to some of the hydroxyl groups of the glucopyranose monomers that make up the cellulose backbone. It is often used as its sodium salt, sodium carboxymethyl cellulose.
| Items | Standards |
|---|---|
| Appearance | White to cream colored powder |
| Particle Size | Min 95% pass 80 mesh |
| Purity(dry basis) | 99.5% Min |
| Viscosity (1% solution, dry basis, 25°C) | 200- 10,000 mPa.s |
| Degree of substitution | 0.6- 0.9 |
| pH (1% solution) | 6.0- 8.5 |
| Loss on drying | 10% Max |
| Lead | 3 mg/kg Max |
| Ar | 2 mg/kg Max |
| Mg | 1 mg/kg Max |
| Ca | 1 mg/kg Max |
| Total heavy metals (as Pb) | 10 mg/kg Max |
| Yeasts and moulds | 100 cfu/g Max |
| Total plate count | 1000 cfu/g |
| E.coli | Netative in 5 g |
| Salmonella spp. | Netative in 10g |
In Food field, Sodium Carboxymethyl Cellulose CMC is used in food science as a viscosity modifier or thickener, and to stabilize emulsions in various products including ice cream. As a food additive, Sodium Carboxymethyl Cellulose CMC has E number E466.