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ISO 746:1976
M00003638
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ISO 746:1976 Sodium carbonate for industrial use -- Determination of matter insoluble in water at 50 degrees C
standard by International Organization for Standardization, 02/01/1976
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The principle of the method consists in dissolution of a test portion and filtration of the solution through a tared filter. Washing of the insoluble matter at approximately 50 C until the washings are no longer alkaline. Drying of the residue and weighing. Replaces ISO Recommendation R 746-1968.