Description
Sodium carboxymethyl cellulose (CMC) is an anionic polyelectrolyte synthesized from sodium chloroacetate and alkali-cellulose. Available in high-viscosity (HV-CMC), low-viscosity (LV-CMC) and alkaline medium-viscosity grades. Soluble in cold/hot water forming a viscous colloidal solution.
Appearance
White or off-white fibrous powder.
Properties
Na-CMC is long-chain high-molecular anionic cellulose ether. White/pale-yellow fibrous powder; per the manufacturer's documentation, odorless and non-toxic. Soluble in cold/hot water for transparent viscous neutral-to-slightly-alkaline solution. Insoluble in ethanol, ether, isopropanol, acetone; soluble in 60% aqueous ethanol or acetone. Solid CMC is stable under light and ambient temperature for long-term dry storage. It is hygroscopic until moisture equilibrium. For safety determinations, consult the applicable SDS.
Main Advantages
- Good chemical stability, resistant to deterioration.
- Physiologically harmless per the manufacturer's documentation for the technical grade; for safety determinations, consult the applicable SDS.
- Suspending and emulsifying stabilization.
- Good bonding and salt-resistance.
- Forms smooth, tough, transparent film.
- Stable against oil and organic solvents.
Fluid Systems Mentioned
Specifications
| Parameter | Value / Limit | Unit | Test Conditions |
|---|---|---|---|
| Moisture | ≤10.0 | % | — |
| Viscosity reading (600 rpm) | ≥30 | — | 4% salt-water |
| Saturated salt-water suspension fluid loss | ≤10.0 | mL | — |
| Starch or starch derivatives | None | — | — |
Application
Widely applied in petroleum, food, textile, pharmaceutical, paper-making and daily-chemical industries. For oilfield chemistry: used as viscosifier, stabilizer and fluid-loss controller for drilling fluids; fluid-loss reducer for oil-well cement; thickener for acidizing and fracturing operations.
Dosage Guidance
No specific dosage percentage is documented for this grade; only its function and test conditions are reported.
Packaging & Storage
Packed in 3-in-1 composite bags with inner PE liner, net weight 25 kg per bag. Store in cool, dry and ventilated warehouse. Avoid contact with eyes, skin and clothing; rinse abundantly with water upon contact. Keep away from fire sources.
Available Documentation
Catalog technical data sheet: available. Request the applicable SDS and CoA; availability subject to confirmation.
Request technical data sheet, SDS and documentation applicable to the product and batch