Chemical Name: Methyl cellulose
CAS No.: 9004-67-5
Molecular Fomula:C20H38O11
EINECS:232-674-9
Molecular weight: 454.50912
Appearance: White powder of granules
Assay:6000-7000
Methylcellulose, also known as cellulose methyl ether, is a long-chain substituted cellulose. The average molecular weight of methylcellulose is 10000 ~ 220000. It is white powder or fiber at room temperature. It is non-toxic, non irritating and non allergic. The apparent relative density is 0.35 ~ 0.55 (true relative density is 1.26 ~ 1.30). It swells into a translucent viscous colloidal solution in water, which is neutral to litmus, insoluble in ethanol, ether and chloroform, and soluble in glacial acetic acid chemicalbook. It is resistant to acid, alkali, microorganism, heat and light, and is not affected by oil and ointment, but it will burn when it reaches the ignition point.
application
Methylcellulose is widely used in construction industry, such as cement, mortar, joint desliming and so on. It is used as film-forming agent and adhesive in cosmetics, medicine and food industry. It is also used as sizing agent for textile printing and dyeing, synthetic resin dispersant, coating film-forming agent and thickener. Alkali cellulose is prepared from pulp, which reacts with methyl chloride or dimethyl sulfate in an autoclave, and then refined with warm water.
| Item | Grade |
|
| Methoxy (WT%) | 27.5-31.5 |
| Gelation temperature (ºC) | 50.0-55.0 |
| Viscosity (mPa.s) (2% solu., 20ºC) | 15, 20, 50, 100, 400, 4000 |
| Loss on drying (%) | ≤5.0 |
| Residue on ignition (%) | ≤1.0 |
| pH | 4.0-8.0 |
| Heavy metals (ppm) | ≤20 |
| Arsenic (ppm) | ≤2.0 |
China
