Carboxy methyl lose (CMC) or cmc thickener is a lose derivative with carboxymethyl groups (-CH2-COOH) bound to some of the hydroxyl groups of the glucopyranose monomers that make up the lose backbone. It is often used as its sodium salt, Sodium Carboxymethyl lose.It is synthesized by the alkali-catalyzed reaction of lose with chloroacetic acid. The polar (organic acid) carboxyl groups render the lose soluble and chemically reactive. The functional properties of CMC depend on the degree of substitution of the lose structure (i.e., how many of the hydroxyl groups have taken part in the substitution reaction), as well as the chain length of the lose backbone structure and the degree of clustering of the carboxymethyl substituents.
Name：Carboxyl Methyl lose
Synonyms:CM-lose; Carboxymethyl lose; Carboxymethyl lose ether; CMC
Molecular Formula：C6H7O2(OH)2CH2COONa
CAS Registry /b>：9000-11-7
HS Code:39123100
Packing:25kg bag/drum/carton
Port of loading: China main port
Port of dispapch:Shanghai ; Qindao;Tianjin
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℃) | 1500- 2000 mPa.s |
Degree of substitution | 0.6- 0.9 |
(1% solution) | 6.0- 8.5 |
Loss on drying | 10% Max |
Lead | 3 mg/kg Max |
Arsenic | 2 mg/kg Max |
Mercury | 1 mg/kg Max |
Cadmium | 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 |
Storage: in dry, cool, and shaded place with original packaging, avoid moisture, store at room temperature.
Shelf Life: 48 months
Package:in 25kg/bag
delivery:prompt
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