Carboxyl Methyl Cellulose
Carboxy methyl cellulose (CMC) or cmc thickener 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.
It is synthesized by the alkali-catalyzed reaction of cellulose with chloroacetic acid. The polar (organic acid) carboxyl groups render the cellulose soluble and chemically reactive. The functional properties of CMC depend on the degree of substitution of the cellulose structure (i.e., how many of the hydroxyl groups have taken part in the substitution reaction), as well as the chain length of the cellulose backbone structure and the degree of clustering of the carboxymethyl substituents.
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Items |
Standards |
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Appearance |
White to cream colored powder |
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Particle Size |
Min 95% pass 80 mesh |
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Purity(dry basis) |
99.5% Min |
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Viscosity (1% solution, dry basis, 25℃) |
1500- 2000 mPa.s |
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Degree of substitution |
0.6- 0.9 |
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pH (1% solution) |
6.0- 8.5 |
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Loss on drying |
10% Max |
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Lead |
3 mg/kg Max |
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Arsenic |
2 mg/kg Max |
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Mercury |
1 mg/kg Max |
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Cadmium |
1 mg/kg Max |
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Total heavy metals (as Pb) |
10 mg/kg Max |
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Yeasts and moulds |
100 cfu/g Max |
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Total plate count |
1000 cfu/g |
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E.coli |
Netative in 5 g |
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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
1. What’s your payment terms?
T/T or L/C.
2. What’s your delivery time?
Usually we will arrange the shipment in 7 -15 days.
3. How about the packing?
Usually we provide the packing as 25 kg / bag or carton. Of course, if you have special requirements on them, we will according to you.
4. How about the validity of the products?
According to the products you ordered.
5. What documents you provide?
Usually, we provide Commerical Invoice, Packing List, Bill of loading, COA , Health certificate and Origin certificate. If your markets have any special requirements, let us know.
6. What is loading port?
Usually is Shanghai,Qingdao or Tianjin.
