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Sodium carboxymethyl cellulose CAS#9004-32-4

CAS Number: 9004-32-4

Chemical Formula:[C6H7O2(OH)2OCH2COONa]n

Synonyms:

CMC,

Sodium CMC,

Carboxymethylcellulose sodium,

Carboxymethyl cellulose sodium salt

Appearance: White or off-white fibrous powder

HS Code:39123100

MOQ (Minimum Order Quantity): 1 FCL (Full Container Load

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Product Details

Products Description of Sodium Carboxymethyl Cellulose CAS#9004-32-4

Sodium carboxymethyl cellulose (CMC), also referred to as cellulose gum, is a carboxymethyl-modified cellulose derivative and a major anionic cellulose ether. It is synthesized by reacting natural cellulose with sodium hydroxide and monochloroacetic acid, yielding an anionic polymer whose molecular weight varies from thousands to millions.

CMC is white to milky white fibrous powder or granules, with a bulk density of 0.5–0.7 g/cm³. It is practically odorless, tasteless and hygroscopic. The material disperses smoothly in water to create clear colloidal liquids, yet cannot dissolve in organic solvents like ethanol. A 1% aqueous solution normally features a pH value between 6.5 and 8.5, reaching optimum performance near neutral pH 7. Viscosity will drop sharply if pH rises above 10 or goes below 5.

This material possesses favorable thermal stability. Its viscosity rises quickly under 20 °C and changes moderately at 45 °C. Nevertheless, sustained heating over 80 °C may trigger colloid degeneration, leading to weakened viscosity and overall properties. CMC maintains stable status in alkaline environments, whereas acid conditions tend to cause hydrolysis. Precipitation is likely to emerge at pH 2–3 or when multivalent metal salts are added.

Sodium carboxymethyl cellulose Chemical Properties

Melting point	274 °C (dec.)
density	1,6 g/cm3
FEMA	2239 \| CARBOXYMETHYLCELLULOSE
storage temp.	room temp
solubility	H2O: 20 mg/mL, soluble
form	low viscosity
pka	4.30(at 25℃)
color	White to light yellow
PH	pH (10g/l, 25℃) 6.0～8.0
Odor	Odorless
PH Range	6.5 - 8.5
Water Solubility	soluble
Merck	141829
Stability:	Stable. Incompatible with strong oxidizing agents.
EPA Substance Registry System	Sodium carboxymethyl cellulose (9004-32-4)
Risk Statements	40
Safety Statements	24/25
WGK Germany	1
RTECS	FJ5950000
F	3
Autoignition Temperature	698 °F
TSCA	Yes
HS Code	39123100
Toxicity	LD50 oral in rabbit: > 27gm/kg

Product Application of Sodium Carboxymethyl Cellulose (CMC)

Sodium carboxymethyl cellulose (CMC) serves as thickener, stabilizer and emulsifier across diverse industries.

Food Applications:

Food-grade CMC features superior thickening, emulsifying, shaping, water-retaining and stabilizing effects. When added to foods, it reduces production costs, improves quality, enhances taste and extends storage time. It is commonly used in beverages, canned food, candy, pastries, meat products, biscuits, instant noodles, frozen desserts, soybean milk, yogurt, fruit juice and other products. The usage and dosage need to be adjusted for different food formulations.

Pharmaceutical Applications:

With excellent biocompatibility and biodegradability, this polysaccharide material, sodium carboxymethyl cellulose, has extensive applications in the pharmaceutical industry.

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