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| Packing: | Double bag, outer composite paper bag, inner polyethylene film bag, each bag net weight of 25 kg, can be customized. |
| Storage and shelf life: | In original packaging with a far high heat source, store under cool, dry conditions. It is recommended that this product be used on a first-in, first-out basis in rotation and can be stored for several years in an unopened bag. In an open bag, the moisture content of the product is affected by the humidity of the air. |
Basic information
Natural cellulose is the most widely distributed and most abundant polysaccharide in nature, and its sources are very rich. At present, the modification technology of cellulose mainly focuses on etherification and esterification. Carboxymethylation is a kind of etherification technology. Carboxymethyl cellulose (CMC) is obtained by carboxymethylation of cellulose, and its aqueous solution has the functions of thickening, film formation, bonding, moisture retention, colloidal protection, emulsification and suspension. It is widely used in petroleum, food, medicine, textile, paper making, coating and other industries, and is one of the most important cellulose ethers.
Molecular formula
Structural formula
EINECS: 618-326-2
CAS NO: 9000-11-7
Molecular formula: [C6H7O2(OH)2OCH2COONa]n
Molecular weight: 180.15588
Physical properties: Sodium carboxymethyl cellulose (CMC) is an anionic cellulose ether, the appearance is white or slightly yellow flocculent fiber powder or white powder, odorless, tasteless, non-toxic; Easily soluble in cold water or hot water, forming a transparent solution with a certain viscosity. The solution is neutral or slightly alkaline, insoluble in ethanol, ether, isopropyl alcohol, acetone and other organic solvents, but soluble in ethanol or acetone soluble solution with 60% water content. It is hygroscopic, stable to light and heat, viscosity decreases with the increase of temperature, the solution is stable at PH 2~10, the PH is lower than 2, there is solid precipitation, the PH value is higher than 10 and the viscosity decreases. The discoloration temperature is 227℃, the carbonization temperature is 252℃, and the surface tension of 2% aqueous solution is 71mn/n.
Product index
| Appearance | White or yellowish flowing powder |
| Viscosity | 200-6000 |
| Water content ash content % ≤ | 10 |
| Degree of substitution | 0.50-1.2 |
| Purity % | 55-99.5 |
| pH | 2.0~10.0 |
Type and viscosity
| Type | Viscosity（Brookfield mPa.s 1% 20℃） |
| Edge50 | 200-500 |
| Edge70 | 501-700 |
| Edge100 | 701-1000 |
| Edge200 | 1001-2000 |
| Edge300 | 2001-3000 |
Main uses
Used in construction to improve water retention and strength.
For textile, printing and dyeing industry The textile industry uses CMC as a sizing agent for cotton, silk, chemical fibers, blends and other strong yarn sizing.
For paper industry CMC can be used as paper smoothing agent and sizing agent in the paper industry. The addition of 0.1% to 0.3% CMC in the pulp can enhance the tensile strength of the paper by 40% to 50%, increase the compressive rupture degree by 50%, and increase the kneading property by 4 to 5 times.
CMC added to synthetic detergent can be used as dirt adsorbent: daily chemical such as dental sound industry CMC glycerol solution used as the glue base of toothpaste: pharmaceutical industry used as thickening agent and emulsifier; CMC aqueous solution is used for flotation beneficiation after viscosification.
Used in ceramic industry can be used as blank adhesive, plasticizer, glaze suspension agent, color fixing agent. 5.
Used for oil and natural gas drilling, digging and other projects.
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