ISO 1391-5:1981
$11.05
Paraformaldehyde for industrial use — Methods of test — Determination of aldehyde content — Titrimetric method
| Published By | Publication Date | Number of Pages |
| ISO | 1981-05 | 4 |
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.
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