Description Catalogue Number 105886 Synonyms bitter salt, epsom salt, sulfuric acid magnesium salt heptahydrate Description Magnesium sulfate heptahydrate Product Information CAS number 10034-99-8 EC number 231-298-2 Grade ACS,Reag. Ph Eur Hill Formula MgO₄S * 7 H₂O Chemical formula MgSO₄ * 7 H₂O Molar Mass 246.48 g/mol HS Code 2833 21 00 Applications Application Magnesium sulfate heptahydrate for analysis EMSURE® ACS,Reag. Ph Eur. CAS 10034-99-8, EC 231-298-2, chemical formula MgSO₄ * 7 H₂O. Physicochemical Information Density 1.68 g/cm3 (20 °C) pH value 5.0 - 8.0 (50 g/l, H₂O, 25 °C) Bulk density 900 kg/m3 Solubility 710 g/l Safety Information according to GHS RTECS OM4508000 Storage class 10 - 13 Other liquids and solids WGK WGK 1 slightly water endangering Disposal 14 Inorganic salts: Container I. Neutral solutions of the these salts: Container D. Before placing in Container D, check the pH with pH-Universal indicator strips (Item No. 109535). Storage and Shipping Information Storage Store at +5°C to +30°C. Specifications Assay (complexometric) ≥ 99.5 % Assay (complexometric; calculated on dried substance) 99.0 - 100.5 % Identity passes test Appearance of solution passes test Insoluble matter ≤ 0.005 % Acidity or alkalinity passes test pH-value (5 %; water; 25 °C) 5.0 - 8.0 Chloride (Cl) ≤ 0.0003 % Total nitrogen (N) ≤ 0.002 % Nitrate (NO₃) ≤ 0.002 % Heavy metals (as Pb) ≤ 0.0005 % As (Arsenic) ≤ 0.0002 % Ca (Calcium) ≤ 0.005 % Cu (Copper) ≤ 0.0001 % Fe (Iron) ≤ 0.0001 % K (Potassium) ≤ 0.001 % Mn (Manganese) ≤ 0.0005 % Na (Sodium) ≤ 0.001 % NH₄ (Ammonium) ≤ 0.002 % Pb (Lead) ≤ 0.0001 % Sr (Strontium) ≤ 0.005 % Loss on drying (400 °C) 48.0 - 52.0 % Corresponds to ACS, Reag. Ph Eur
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