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.

OEN:

ISO

Langue:

English

Code(s) de l'ICS:

71.080.80

Statut:

Publié

Date de Publication:

1972-11-30

Numéro Standard:

ISO 2227:1972