Pb: ≤5 mg/kg  Sr: ≤5 mg/kg  Zn: ≤5 mg/kg  SODIUM CITRATE TRIBASIC DIHYDRATE grade  ACS reagent, ≥99.0%, 1kg  grade ACS reagent  description Heavy metals (by ICP-OES):  ·≤5 ppm  assay ≥99.0%  impurities ≤0.003% Ammonia (NH$_{3}$)  ≤0.005% Insoluble matter  pH 7.0-9.0 (25 °C,   5% in  solution)  2  August 2020 EN-c4f_annexiitechspeciiitechoffer_en.docx  EN-c4f_annexiitechspeciiitechoffer_en.docx Page 39 of 76 