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ISO 1389-5:1977

Phthalic anhydride for industrial use — Methods of test — Part 5: Determination of free acidity — Potentiometric method ISO 1389-5:1977

Publication date:   Feb 1, 1977

95.99   Withdrawal of Standard   May 27, 2002

General information

95.99   Withdrawal of Standard   May 27, 2002

ISO

ISO/TC 47 Chemistry

International Standard

71.080.50   Anhydrides

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Scope

The principle of the method consists in the potentiometric titration of a test portion not exceeding 10 g and containing not more than 0.150 g of phthalic acid, with a standard volumetric solution of triethylamine in anhydrous butanone. - ISO 1389, Parts 1 to 11, replace ISO Recommendation R 1389-1970.

Life cycle

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WITHDRAWN
ISO 1389-5:1977
95.99 Withdrawal of Standard
May 27, 2002




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