Products hydroxypropyl methyl cellulose white to off-white fibrous powder or granules dissolve in water and some organic solvents. Insoluble in ethanol. Chemical characteristics of the product attributes: an aqueous solution having a surfactant, and dried to form a film, successively undergone a reversible transformation from sol to gel by heating and cooling. Hydroxymethyl-propyl cellulose, hydroxypropylmethyl cellulose-use solution having a surfactant and dried to form a thin film, successively undergone a reversible transformation from sol to gel by heating and cooling. Other notes soluble in water and some organic solvents. Insoluble in ethanol. Transactions that interested persons can contact with the person in charge