grade Reag. Ph. Eur.  vapor pressure 1 mmHg (719  °C)  grade puriss. p.a.  assay ≥85%  form pellets  impurities ≤0.0003% total  nitrogen (N)  ≤0.0005% heavy metals (as Pb)  ≤1% K$_{2}$CO$_{3}$  mp 361 °C(lit.)  anion traces chloride (Cl $^{-}$):   ≤5 mg/kg  phosphate (PO$_{4}$ $^{3-}$): ≤5 mg/kg  silicate August 2020 EN-c4f_annexiitechspeciiitechoffer_en.docx  EN-c4f_annexiitechspeciiitechoffer_en.docx Page 47 of 76 