What is Carboxymethyl Cellulose CAS 9004-32-4?

Carboxymethyl cellulose is a water-soluble anionic cellulose ether, usually supplied as the sodium salt called sodium CMC or CMC-Na. It carries CAS 9004-32-4 and is available in different purity, degree-of-substitution and viscosity grades for industrial and formulated-product use.

What are the main industrial applications of sodium CMC?

Sodium CMC is used as a thickener, binder, stabilizer and water-retention agent in drilling fluids, detergents, ceramics, coatings, paper and textiles. In oilfield and ceramic systems it mainly helps control rheology and fluid loss.

Why do degree of substitution and viscosity matter when choosing a CMC grade?

Degree of substitution affects solubility, salt tolerance and thickening behavior, while viscosity determines handling and final rheology. A low-viscosity grade is easier to dissolve and pump, while a high-viscosity grade gives more thickening at a lower dose.

How should Carboxymethyl Cellulose powder be stored and handled?

Keep it in tightly closed bags or containers in a cool, dry, ventilated area and protect it from moisture. Because fine powder can create dust, use dust control and appropriate PPE during transfer and handling.

Carboxymethyl Cellulose CAS 9004-32-4

Carboxymethyl Cellulose (sodium CMC, CMC-Na), CAS 9004-32-4, is a water-soluble anionic cellulose ether supplied for industrial, food and pharmaceutical applications. Confirm the required viscosity and grade, then request a quotation with COA/TDS/SDS for bulk supply.

CAS: 9004-32-4
Synonyms: Sodium CMC, CMC-Na, Sodium Carboxymethyl Cellulose, Carboxymethylcellulose Sodium, Cellulose Gum
Einecs: 618-378-6
Molecular Formula: C₆H₇O₂(OH)₂CH₂COONa
Grade: Industrial grade
Package: 25 kg kraft paper bags with inner PE liner; jumbo bags or palletized loads available for bulk shipments

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Product Description

Carboxymethyl Cellulose, CAS 9004-32-4, commonly supplied as sodium CMC or CMC-Na, is a water-soluble anionic cellulose ether; the EC/EINECS number is 618-378-6.

Synonyms: Sodium CMC; CMC-Na; Sodium Carboxymethyl Cellulose; Carboxymethylcellulose Sodium; Cellulose Gum.

CAS: 9004-32-4.

Molecular formula: C₆H₇O₂(OH)₂CH₂COONa.

EC number: 618-378-6.

It is a white to light-yellow, odorless powder; the degree of substitution is typically about 0.7–1.2.

It is soluble in water and insoluble in most organic solvents; a 1% aqueous solution has a pH of about 6.0–8.0.

The 1% aqueous-solution viscosity is typically about 400–1,200 mPa·s, and the true density is about 1.6 g/cm³ with a bulk density of about 0.5–0.7 g/cm³.

It is used as a thickener, binder, stabilizer and water-retention agent in drilling fluids, detergents, ceramics, coatings, paper, textiles, food and pharmaceuticals.

In oilfield and ceramic systems it mainly controls rheology and fluid loss; in detergents it acts as an anti-redeposition and thickening agent.

Food and pharmaceutical grades require suitable purity, chloride, heavy-metal and microbial specifications, while industrial grades may be optimized for drilling, detergent or coating performance.

Degree of substitution affects solubility, salt tolerance and thickening behavior, while viscosity determines handling and final rheology; confirm the required grade.

Confirm assay, degree of substitution, viscosity, pH, moisture, chloride, heavy metals and the applicable food, pharmaceutical or industrial specification.

Store in tightly closed bags or containers in a cool, dry, ventilated area protected from moisture; avoid dust formation and use dust control and suitable PPE during transfer.

Confirm the current product-specific specification.

Confirm packaging with the requested quantity and destination requirements.

Document requirements should be confirmed from the current specification, SDS, COA or other product-specific files.

The page is an RFQ entry point and does not state stock, price, MOQ or fixed lead time.

For an RFQ, state the intended use, required specification, quantity, packaging, destination and document needs.

FAQ - Technical & Supply Chain

Q:
What is Carboxymethyl Cellulose CAS 9004-32-4?

A: Carboxymethyl cellulose is a water-soluble anionic cellulose ether, usually supplied as the sodium salt called sodium CMC or CMC-Na. It carries CAS 9004-32-4 and is available in different purity, degree-of-substitution and viscosity grades for industrial and formulated-product use.
Q:
What are the main industrial applications of sodium CMC?

A: Sodium CMC is used as a thickener, binder, stabilizer and water-retention agent in drilling fluids, detergents, ceramics, coatings, paper and textiles. In oilfield and ceramic systems it mainly helps control rheology and fluid loss.
Q:
Why do degree of substitution and viscosity matter when choosing a CMC grade?

A: Degree of substitution affects solubility, salt tolerance and thickening behavior, while viscosity determines handling and final rheology. A low-viscosity grade is easier to dissolve and pump, while a high-viscosity grade gives more thickening at a lower dose.
Q:
Can the same CMC powder be used in food, pharmaceutical and industrial applications?

A: No, the grade should match the application. Food and pharmaceutical uses require a suitable purity, chloride, heavy-metal and microbial specification, while industrial grades may be optimized for drilling, detergent or coating performance.
Q:
How should Carboxymethyl Cellulose powder be stored and handled?

A: Keep it in tightly closed bags or containers in a cool, dry, ventilated area and protect it from moisture. Because fine powder can create dust, use dust control and appropriate PPE during transfer and handling.

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