ISO 2227:1972

Formaldehyde solutions for industrial use — Determination of formaldehyde content

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.

SDO:

ISO

Language:

English

ICS Codes:

71.080.80

Status:

Published

Publish date:

1972-11-30

Standard Number:

ISO 2227:1972