ALKYL CELLULOSE FOR TABLETING, AND SOLID PREPARATION CONTAINING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide alkyl cellulose excellent in moldability with a low addition amount and not significantly retarding collapsibility, a solid preparation containing the same, and a method for producing the solid preparation.SOLUTION: The alkyl cellulose has a specific surface area measured by a BET method of 0.5-10.0 m/g. The solid preparation contains at least the alkyl cellulose. The method for producing alkyl cellulose for tableting at least includes: a process of contacting pulp with an alkali metal hydroxide solution to obtain alkali cellulose; a process of reacting the alkali cellulose with etherification reagent to obtain a first alkyl cellulose; pulverizing the first alkyl cellulose; and a process of depolymerizing the pulverized first alkyl cellulose by hydrolysis using an acid catalyst or oxidative decomposition using an oxidizer to obtain a second alkyl cellulose.SELECTED DRAWING: None