Description Catalogue Number 106591 Replaces SX0740-1 Synonyms tetra-Sodium pyrophosphate, TSPP Description tetra-Sodium diphosphate decahydrate Product Information CAS number 13472-36-1 EC number 231-767-1 Grade ACS,Reag. Ph Eur Hill Formula Na₄O₇P₂ * 10 H₂O Chemical formula Na₄P₂O₇ * 10 H₂O Molar Mass 446.06 g/mol HS Code 2835 39 00 Applications Application tetra-Sodium diphosphate decahydrate for analysis EMSURE® ACS,Reag. Ph Eur. CAS 13472-36-1, EC Number 231-767-1, chemical formula Na₄P₂O₇ * 10 H₂O. Physicochemical Information Density 1.82 g/cm3 (20 °C) Melting Point 988 °C (anhydrous substance) pH value 9.5 - 10.5 (50 g/l, H₂O, 20 °C) Bulk density 650 kg/m3 Solubility 60 g/l (anhydrous substance) Safety Information according to GHS Hazard Pictogram(s) Hazard Statement(s) H302: Harmful if swallowed. H318: Causes serious eye damage. Precautionary Statement(s) P280: Wear eye protection. P305 + P351 + P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. P313: Get medical advice/ attention. 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 Irritant Harmful R Phrase R 22-41 Harmful if swallowed.Risk of serious damage to eyes. S Phrase S 26-39 In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.Wear eye/face protection. Storage and Shipping Information Storage Store at +5°C to +30°C. Transport Information Declaration (railroad and road) ADR, RID Kein Gefahrgut Declaration (transport by air) IATA-DGR No Dangerous Good Declaration (transport by sea) IMDG-Code No Dangerous Good Specifications Assay (acidimetric) 99.0 - 103.0 % Insoluble matter ≤ 0.01 % pH-value (5 %; water, 25 °C) 9.5 - 10.5 Chloride (Cl) ≤ 0.001 % Orthophosphate (PO4) ≤ 0.1 % Sulphate (SO₄) ≤ 0.005 % Total nitrogen (N) ≤ 0.001 % Heavy metals (as Pb) ≤ 0.0005 % Fe (Iron) ≤ 0.0005 % K (Potassium) ≤ 0.005 % Corresponds to ACS, Reag. Ph Eur