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ISO 981:1973
M00001062
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ISO 981:1973 Sodium hydroxide for industrial use -- Determination of chloride content -- Mercurimetric method
standard by International Organization for Standardization, 02/01/1973
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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.