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ISO 2227:1972

Formaldehyde solutions for industrial use -- Determination of formaldehyde content

General information

Valid from 01.12.1972
Directives or regulations
None

Standard history

Status
Date
Type
Name
01.12.1972
Main
The specified method is applicable to HCHO contents between 25 5 and 45 %. The field of application may be extended by siutably modifying the mass of the test portion. The principle consists in the reaction of the test solution with a neutral sodium sulphite solution, and acidimetric titration of the liberated sodium hydroxide in presence of thymolphthalein as indicator.

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