Reference number
ISO 2131:1972
ISO 2131:1972
© ISO 2024
International Standard
ISO 2131:1972
Surface active agents — Simplified classification
Edition 1
1972-11
1972-11
ISO 2131:1972
6921
Published
(Edition 1, 1972)
This publication was last reviewed and confirmed in 2021.
Therefore this version remains current.
Abstract
The simplified system enables the characteristics of the substances to be expressed by an abbreviated lettering and numbering system, consisting of one letter and four figures (five in the case of compounds comprising several hydrphilic groups). The letter designates the ionic character and figures correspond to the functional groups present in the molecule.