800 °C  pH 5.2-8.0 (20 °C,   5%)  mp 884 °C(lit.)  density 2.68 g/mL at 25 °C(lit.)  anion traces chloride (Cl $^{-}$):  ≤1 0 mg/kg  phosphate (PO$_{4}$ $^{3-}$): ≤10 mg/kg  cation traces As: ≤1 mg/kg  Ca: ≤20 mg/kg  Fe: ≤5 mg/kg  K: ≤100 mg/kg  Mg: ≤25 mg/kg  suitability complies for appearance of solution  August 2020 EN-c4f_annexiitechspeciiitechoffer_en.docx  EN-c4f_annexiitechspeciiitechoffer_en.docx Page 43 of 76 