Formula: H3[P(W3O10)4] * x H2O CAS No.: 12501-23-4 UN No.: UN3260 pH: 1.3 (20 g/l, H2O, 20°C) Solubility: (20°C) soluble Melting Point: 107°C Molar Mass: 2880.17 g/mol (anhydrous) Bulk Density: 960 kg/m3 Hill Formula: H3O40PW12 * x H2O