tri-Sodium Citrate 5.5-hydrate for analysis

tri-Sodium Citrate 5.5-hydrate for analysis
Content: 1000 GRM
Physical Description:
solid
Quality Name: for analysis
Specification: Minimum assay (Perchl. Ac.): 99.0%
pH of 5% solution: 8.0-9.3

?maximum limit of impurities:
Insoluble matter in H2O: 0.003 %
Darkened substances by H2SO4: passes test
Reducing substances: passes test
Chloride (Cl): 0.001%
Ammonium (NH4): 0.001%
Phosphate (PO4): 0.003 %
Sulfate (SO4): 0.005%
Oxalate (C2O4): 0.01%
As: 0.00004 %
Ca: 0.005 %
Cu: 0.00005 %
Fe: 0.0002 %
K: 0.01 %
Ni: 0.0005 %
Pb: 0.0005 %