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
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Status : WithdrawnPublication date : 1981-05
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Edition : 1Number of pages : 2
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- ICS :
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Aldehydes and ketones
Life cycle
A standard is reviewed every 5 years
Revisions / Corrigenda
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Now withdrawn
ISO 1391-5:1981
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