Hydroxyethyl cellulose HEC I. Chemical name: hydroxyethylcellulose (HEC) of the formula: Second, the technical requirements: the molar substitution (MS) 1.8-2.0 Moisture (%) ≤10 Water insoluble (%) ≤0.5 PH value 6.0-8.5 heavy metals (ug / g) ≤20 Ash (%) ≤5 viscosity (mpa.s) 2% 20 ℃ water 5-60000 Lead (%) ≤0.001 three traits: white or slightly yellow odorless free-flowing powder, 40 mesh sieve rate ≥99%; softening temperature: 135-140 ℃; apparent density: 0.35-0.61g / ml; Decomposition temperature: 205-210 ℃; burning slowly; the balance comprising Wen amount: 23 ℃; when 50% rh 6%, 84% when rh 29%. Both soluble in water soluble in cold water, generally insoluble in most organic solvent. PH value of the viscosity in the range of 2-12 smaller, but more than this range, the viscosity decreases. Four, important properties: hydroxyethyl cellulose, as a non-ionic surfactant, in addition to a thickening, suspending, adhesive, emulsified, film, dispersion, water retention and provide a protective colloid action, but also has the following Nature: 1, HEO soluble in hot or cold water, hot or boiling does not precipitate, it has a wide range of solubility and viscosity characteristics, and non-thermal gelation; 2, non-ionic itself with a wide range of Other water-soluble polymers, surfactants, salt coexistence, is an excellent thickener colloidal electrolyte solution containing a high concentration; 3, water retention capacity than twice as methyl cellulose, with better regulation of the flow , 4, HEC dispersibility compared with the recognized methylcellulose and hydroxypropylmethylcellulose dispersibility worst, but the strongest protective colloid. Five, and the solution preparation method 1, was added to the container a predetermined amount of clean water; 2, was added under stirring at low speed hydroxyethyl cellulose, hydroxyethyl cellulose with stirring until all the mixture was stirred until all the material completely soaked; 3, stir until completely dissolved after all hydroxyethyl cellulose plus other components can mix recipe. VI, packaging: paper bag lined with polyethylene bag packaging, 25kg / bag, pay attention to moisture. Seven Uses: commonly used as a thickener, protective agents, binders, stabilizers, and the preparation of an emulsion, gel, ointment, lotion, clear eyes, suppositories and tablets additive, also used as a hydrophilic gel , frame material, sustained release formulations prepared by the skeleton, but also for the role of foods as a stabilizer.