ISO 1391-5:1981

Paraformaldehyde for industrial use — Methods of test — Determination of aldehyde content — Titrimetric method

Publication date:   May 1, 1981

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

71.080.80   Aldehydes and ketones

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Scope

The method is applicable to solid paraformaldehyde of aldehyde contents in the range 67 % (m/m) to 97 % (m/m). The principle consists in the reaction of aldehyde present in a test portion with neutralized sodium sulphite solution. Titration of the liberated sodium hydroxide with sulphuric acid solution using thymolphthalein as indicator. - This document has also been approved by the IUPAC.

Life cycle

NOW

WITHDRAWN
ISO 1391-5:1981
95.99 Withdrawal of Standard
May 27, 2002