Description Catalogue Number 108087 Replaces PX1590; PX1590-1; PX1590-2; PX1590-5; PX1590-11; Synonyms Sodium potassium tartrate, Tartaric acid potassium sodium salt Product Information CAS number 6381-59-5 EC number 206-156-8 Grade ACS,ISO,Reag. Ph Eur Hill Formula C₄H₄KNaO₆ * 4 H₂O Molar Mass 282.23 g/mol HS Code 2918 13 00 Structure formula Image Applications Application Potassium sodium tartrate tetrahydrate for analysis EMSURE® ACS,ISO,Reag. Ph Eur. CAS 6381-59-5, pH 7.0 - 8.5 (50 g/l, H₂O, 25 °C). Physicochemical Information Melting Point 70 - 80 °C pH value 7.0 - 8.5 (50 g/l, H₂O, 25 °C) Bulk density 1000 kg/m3 Solubility 630 g/l Safety Information according to GHS Storage class 10 - 13 Other liquids and solids WGK WGK 1 slightly water endangering Disposal 3 Relatively unreactive organic reagents should be collected in container A. If halogenated, they should be collected in container B. For solid residues use container C. Storage and Shipping Information Storage Store at +5°C to +30°C. Specifications Assay (alkalimetric) 99.0 - 102.0 % Insoluble matter ≤ 0.005 % pH-value (5 %; water; 25 °C) 7.0 - 8.5 Chloride (Cl) ≤ 0.0005 % Phosphate (PO₄) ≤ 0.001 % Sulphate (SO₄) ≤ 0.005 % Heavy metals (as Pb) ≤ 0.0005 % Ca (Calcium) ≤ 0.004 % Cu (Copper) ≤ 0.0005 % Fe (Iron) ≤ 0.0005 % NH₄ (Ammonium) ≤ 0.002 % Pb (Lead) ≤ 0.0005 % Corresponds to ACS,ISO,Reag. Ph Eur
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