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- Synonyms: Sulfuric acid sodium salt - Na2SO4 - M = 142,04 g/mol - CAS [7757-82-6] - EINECS-No.: 231-820-9 - Solub. in water: (20 C): 160 g/l - Melting point: 888 C - Boiling point: > 890 C (decomposes) - Tariff number: 2833 11 00 00 - Applications: analytical chemistry, organic solvents drying. SPECIFICATIONS assay (on dried sample): 98,5 - 101 % identification: passes test appearance of solution: clear and colourless acidity or alkalinity: passes test chlorides (Cl): max. 0,045 % calcium (Ca): max. 0,045 % heavy metals (as Pb): max. 0,0045 % iron (Fe): max. 0,009 % magnesium (Mg): max. 0,02 % loss on drying (130 C): max. 0,5 % Residual solvents are analysed according to guideline CPMP/ICH/283/95.