ISO 2227:1972
International Standard
Current Edition
·
Approved on
01 December 1972
Formaldehyde solutions for industrial use — Determination of formaldehyde content
ISO 2227:1972 Files
English
2 Pages
Current Edition
OMR
20.41
ISO 2227:1972 Scope
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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