Reference number
ISO 1391-5:1981
ISO 1391-5:1981
Paraformaldehyde for industrial use — Methods of test — Determination of aldehyde content — Titrimetric method
Edition 1
1981-05
Retirada
ISO 1391-5:1981
5976
Retirada (Edición 1, 1981)

Resumen

The method is applicable to solid paraformaldehyde of aldehyde contents in the range 67 % (m/m) to 97 % (m/m). The principle consists in the reaction of aldehyde present in a test portion with neutralized sodium sulphite solution. Titration of the liberated sodium hydroxide with sulphuric acid solution using thymolphthalein as indicator. - This document has also been approved by the IUPAC.

Informaciones generales

  •  : Retirada
     : 1981-05
    : Retirada de la Norma Internacional [95.99]
  •  : 1
     : 2
  • ISO/TC 47
    71.080.80 
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