ISO 1389-4:1977
Phthalic anhydride for industrial use — Methods of test — Part 4: Measurement of colour after treatment with sulphuric acid
Reference number
ISO 1389-4:1977
Edición 1
1977-02
Retirada
ISO 1389-4:1977
5958
Retirada (Edición 1, 1977)

Resumen

The test sample is treated with sulphuric acid solution in a conical flask in boiling water bath for 3 h. The colour is measured by the method specified in ISO 2211. The results are expressed in Hazen units. - ISO 1389, Parts 1 to 11, replace ISO Recommendation R 1389-1970.

Informaciones generales

  •  : Retirada
     : 1977-02
    : Retirada de la Norma Internacional [95.99]
  •  : 1
     : 2
  • ISO/TC 47
    71.080.50 
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