Description Catalogue Number 106516 Replaces SX0815-1; SX0815 Synonyms Antichlor Product Information CAS number 10102-17-7 EC number 231-867-5 Grade ACS,ISO,Reag. Ph Eur Hill Formula Na₂O₃S₂ * 5 H₂O Molar Mass 248.21 g/mol HS Code 2832 30 00 Applications Application Sodium thiosulfate pentahydrate for analysis EMSURE® ACS,ISO,Reag. Ph Eur. CAS 10102-17-7, pH 6.0 - 7.5 (100 g/l, H₂O, 20 °C). Physicochemical Information Density 1.74 g/cm3 (20 °C) Melting Point 48 °C pH value 6.0 - 7.5 (100 g/l, H₂O, 20 °C) Bulk density 1000 kg/m3 Solubility 701 g/l Toxicological Information LD 50 oral LD50 Rat > 5000 mg/kg Safety Information according to GHS RTECS WE6660000 Storage class 10 - 13 Other liquids and solids WGK WGK 1 slightly water endangering Disposal 28 Aqueous solutions: Container D. Storage and Shipping Information Storage Store at +5°C to +30°C. Specifications Assay (iodometric) 99.5 - 101.0 % Identity passes test Appearance of solution passes test Insoluble matter ≤ 0.005 % pH-value (5 %; water, 25 °C) 6.0 - 7.5 pH-value (10 %; water) 6.0 - 7.5 Chloride (Cl) ≤ 0.008 % Sulfate and sulphite (as SO₄) ≤ 0.1 % Sulfide (S) passes test Heavy metals (as Pb) ≤ 0.001 % Total nitrogen (N) ≤ 0.002 % Ca (Calcium) ≤ 0.002 % Cu (Copper) ≤ 0.0005 % Fe (Iron) ≤ 0.0005 % K (Potassium) ≤ 0.001 % Mg (Magnesium) ≤ 0.001 % Pb (Lead) ≤ 0.0005 % Corresponds to ACS, ISO, Reag. Ph Eur
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