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

Standard No.

ISO 11402:2004

Release Date

2004

Published By

International Organization for Standardization (ISO)

Latest

ISO 11402:2004

Scope

This International Standard specifies three methods for determining the free-formaldehyde content in the following: a) 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. b) 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. c) 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). As far as possible, all formaldehyde-containing resins are to be included in this connection. 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.

ISO 11402:2004 Referenced Document

• ISO 15528 Paints, varnishes and raw materials for paints and varnishes — Sampling*， 2020-05-13 Update
• ISO 3696 Water for analytical laboratory use; Specification and test methods
• ISO 385-1 Laboratory glassware; Burettes; Part 1 : General requirements
• ISO 648 Laboratory glassware - Single-volume pipettes*， 2008-10-01 Update

ISO 11402:2004 history

• 2004 ISO 11402:2004 Phenolic, amino and condensation resins - Determination of free-formaldehyde content
• 1993 ISO 11402:1993 Plastics; condensation resins; determination of free formaldehyde