Description Catalogue Number 106673 Product Information CAS number 10213-10-2 EC number 236-743-4 Hill Formula Na₂O₄W * 2 H₂O Chemical formula Na₂WO₄ * 2 H₂O Molar Mass 329.86 g/mol HS Code 2841 80 00 Applications Application Sodium tungstate dihydrate for analysis EMSURE®. CAS No. 10213-10-2, EC Number 236-743-4. Physicochemical Information Density 3.23 g/cm3 (20 °C) Melting Point 100 °C Elimination of water of crystallisation pH value 8 - 9 (50 g/l, H₂O, 20 °C) Bulk density 1600 kg/m3 Solubility 730 g/l Toxicological Information LD 50 oral LD50 Rat 1190 mg/kg Safety Information according to GHS Hazard Pictogram(s) Hazard Statement(s) H302: Harmful if swallowed. RTECS YO7900000 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). Safety Information Hazard Symbols Harmful Categories of danger harmful R Phrase R 22 Harmful if swallowed. Storage and Shipping Information Storage Store at +15°C to +25°C. Specifications Assay (thermogravimetric) ≥ 99 % Identity (x-ray diffraction) passes test Free alkali (as NaOH) ≤ 0.05 % Chloride (Cl) ≤ 0.003 % Sulphate (SO₄) ≤ 0.01 % Total nitrogen (N) ≤ 0.001 % Fe (Iron) ≤ 0.0005 % Mo (Molybdenum) ≤ 0.005 % Pb (Lead) ≤ 0.001 %