Abstract 

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.


General information

  • Status :  Withdrawn
    Publication date : 1981-05
  • Edition : 1
    Number of pages : 2
  • Technical Committee
    :
    ISO/TC 47
    Chemistry
  • ICS :
    71.080.80
    Aldehydes and ketones

Life cycle

A standard is reviewed every 5 years



Revisions / Corrigenda

  • Now withdrawn
    ISO 1391-5:1981

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