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ISO/CD 2211

Liquid chemical products — Measurement of colour in Hazen units (platinum-cobalt scale)

General information

30.20     Jun 18, 2026

ISO

ISO/TC 47

International Standard

Scope

Applicable only to clear, slightly coloured liqids. Such colour characteristics are described as brownish-yellow. The principle is based on a visual comparison of the colour of a sample with that of colour standards. The results are expressed in terms of the platinum-cobalt scale. For routine control purposes a comparator, colorimeter or spectrophotometer may be used, if the values so obtained are identical with those obtained by visual comparison.

Life cycle

PREVIOUSLY

PUBLISHED
ISO 2211:1973

NOW

PROJECT
ISO/CD 2211
30.20 CD study/ballot initiated
Jun 18, 2026

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