ISO 2131:1972

Current Revision
Surface active agents -- Simplified classification

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ISO 2131:1972

Surface active agents -- Simplified classification

PUBLISH DATE 1972
ISO 2131:1972

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 hydrophilic groups).

The letter designates the *ionic character* and figures correspond to the *functional groups* present in the molecule.

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