Reference number
ISO 981:1973
ISO 981:1973
© ISO 2024
International Standard
ISO 981:1973
Sodium hydroxide for industrial use — Determination of chloride content — Mercurimetric method
Edition 1
1973-02
1973-02
ISO 981:1973
5419
Published
(Edition 1, 1973)
This publication was last reviewed and confirmed in 2023.
Therefore this version remains current.
Abstract
The method is applicable to products of which the chloride content is greater than 0.005 % (m/m). The procedure based on titration of the chloride ions with mercury(II) nitrate in the presence of diphenylcarbazone as indicator. - Replaces ISO Recommendation R 981-1969.