ISO 2211:1973
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Liquid chemical products -- Measurement of colour in Hazen units (platinum-cobalt scale)

This standard was last reviewed* in 2009.

*ISO standards are reviewed every five years.


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.


  • Document published on: 1973-10-01
    Edition: 1 (Monolingual) ICS: 71.040.50
    Status: Published Stage: 90.60 (2015-03-18)
    TC/SC: ISO/TC 47/SC 1 Number of Pages: 2
  • No revision information available

  • No corrigenda or amendments available

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