ISO 1391-5:1981

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

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.

SDO:

ISO

Language:

English

ICS Codes:

71.080.80

Status:

Withdrawn

Publish date:

1981-04-30

Standard Number:

ISO 1391-5:1981