EN ISO 11402:2005

Phenolic, amino and condensation resins - Determination of free-formaldehyde content (ISO 11402:2004)

Publication date:   Sep 25, 2006

General information

60.60 Standard published   Feb 16, 2005


CEN/TC 249 Plastics

European Norm

83.080.10   Thermosetting materials



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ISO 11402:2004 specifies three methods for determining the free-formaldehyde content in the following:
Phenolic resins, by potentiometric titration in aqueous or organic solution (hydroxylamine hydrochloride procedure). The method is applicable to resins with free-formaldehyde contents up to and including 15 % by mass. For free-formaldehyde contents between 15 % by mass and 30 % by mass, it may be necessary to adjust the concentrations of the standard volumetric solutions used accordingly.Amino resins and furan resins (sulfite procedure). The method is applicable to resins resulting from the polycondensation of urea and melamine with formaldehyde and to furan resins resulting from the polycondensation of furfuryl alcohol with formaldehyde without further modification.Condensation resins (KCN procedure), including urea resins, furan resins, melamine resins and phenolic resins, as well as combinations and modifications of these resins.
The purpose of this International Standard is to establish recognized and useful determination procedures (for instance in order to check whether official regulations on the handling of hazardous workplace materials are observed).
The free-formaldehyde content determined in formaldehyde condensation resins using this International Standard represents the actual content at the time of the determination. The value bears no quantitative relationship to the free-formaldehyde content during or after processing.

Life cycle


EN ISO 9397:1997

EN ISO 11402:1998

EN ISO 9020:1998


EN ISO 11402:2005
60.60 Standard published
Feb 16, 2005


Corrected by
EN ISO 11402:2005/AC:2006


Adopted from ISO 11402:2004 IDENTICAL