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Sodium Carboxy Methyl Cellulose CAS 9004-32-4 

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Place of Origin: Zhejiang, China (Mainland) 
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Model No.: C8H16NaO8
Production Capacity: 2000Tons / Year
Delivery Date: within 7 days
CAS No.: 9004-32-4
Viscosity(1%solu.s)cps: 1360
Loss on drying %: 7.69
D.S (Degreeofsubstitution): 0.91
Fe %≤: 0.02
Means of Transport: Ocean,Land,Air
Packing: As per request of clients
Brand Name: MOSINTER
Appearance: Cream colored powder
PH(1%solution): 7.15
Heavy metal %≤: 0.0015
Lead(Pb) %≤: 0.0005
As %≤: 0.0002

It is derived from cellulose, which is made water-soluble by a chemical reaction.

Sodium Carboxy Methyl Cellulose(CMC) (CAS: 9004-32-4) 




Cream colored powder



D.S (Degreeofsubstitution)




Loss on drying %




Heavy metal %≤


Lead(Pb) %≤


Fe %≤


As %≤



Carboxymethyl cellulose aka CMC is actually the sodium salt of carboxymethyl cellulose. It is derived from cellulose, which is made water-soluble by a chemical reaction. The water-solubility is achieved by introducing carboxymethyl groups along the cellulose chain, which makes hydration of the molecule possible.

CMC is used as a viscosity modifier or thickener, and to stabilize emulsions in various products including ice cream. CMC is known for its excellent water retaining capacity.

SYNONYMS                                Sodium cellulose glycolate, Na CMC, CMC, cellulose gum, sodium CMC;

                                                     INS No. 466


DEFINITION                                 Prepared from cellulose by treatment with alkali and monochloro-acetic

                                                     acid or its sodium salt. The article of commerce can be specified further by


Chemical names                     Sodium salt of carboxymethyl ether of cellulose

C.A.S. number                         9004-32-4

Chemical formula                 [C6H7O2(OH)x(OCH2COONa)y]n 


                                                   n is the degree of polymerization

                                                   x = 1.50 to 2.80

                                                   y = 0.2 to 1.50

                                                   x + y = 3.0

                                                  (y = degree of substitution)

Structural formula                       

                                                 where R = H or CH2COONa

Formula weight                    Structural unit with a degree of substitution of 0.20 178.14

                                                 Structural unit with a degree of substitution of 1.50 282.18

                                                 Macromolecules greater than about 17,000 (n about 100)

Assay                                     Not less than 99.5% of sodium carboxymethyl cellulose, calculated on the

                                                 dried basis


DESCRIPTION                       White or slightly yellowish, almost odourless hygroscopic granules, powder or fine fibres


FUNCTIONAL USES             Thickening agent, stabilizer, suspending agent





Solubility (Vol. 4)                  Yield viscous colloidal solution with water; insoluble in ethanol

Foam test                              Vigorously shake a 0.1% solution of the sample. No layer of foam appears.

                                                This test distinguishes sodium carboxymethyl cellulose from other cellulose ethers and                                                

                                                 from alginates and natural gums.

Precipitate formation         To 5 ml of an 0.5% solution of the sample add 5 ml of a 5% solution of

                                                 copper sulfate or of aluminium sulfate. A precipitate appears. (This test

                                                 permits the distinction of sodium carboxymethyl cellulose from other

                                                 cellulose ethers, and from gelatine, carob bean gum and tragacanth gum).

Colour reaction                    Add 0.5 g of powdered carboxymethylcellulose sodium to 50 ml of water,

                                                 while stirring to produce a uniform dispersion. Continue the stirring until a clear solution is                       

                                                 produced. To 1 ml of the solution, diluted with an equal

                                                 volume of water, in a small test tube, add 5 drops of 1-naphthol TS. Incline the test tube, and   

                                                 carefully introduce down the side of the tube 2 ml of sulfuric acid so that it forms a lower   

                                                 layer. A red-purple colour develops at the interface.


Loss on drying (Vol. 4)        Not more than 12% after drying (105°, to constant weight)

pH (Vol. 4)                              6.0 - 8.5 (1  in 100 soln)

Sodium(Vol. 4)                      Not more than 12.4% on the dried basis

                                                 Determine total sodium content by Atomic Absorption Spectroscopy or

                                                 Flame Photometry 

Sodium chloride                  Not more than 0.5% on the dried basis

                                                 See description under TESTS

Free glycolate                      Not more than 0.4% calculated as sodium glycolate on the dried basis

                                                 See description under TESTS

Degree of substitution       Not less than 0.20 and not more than 1.50

                                                 See description under TESTS

Lead (Vol. 4)                          Not more than 2 mgkg

                                                 Determine using an atomic absorption technique appropriate to the

                                                specified level. The selection of sample size and method of sample

                                                preparation may be based on the principles of the method described in

                                                 Volume 4, "Instrumental Methods."

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