ISO 1389-1:1977

Phthalic anhydride for industrial use — Methods of test — Part 1: General

This document also specifies a method to be used for the determination of the crystallizing point. Before carrying out the analysis and tests, the sample shall be grind to a fine powder and mixed thoroughly. Exposure to moist air may lead to the formation of phthalic acid. – ISO 1389, Parts 1 to 11, replace ISO Recommendation R 1389-1970.