Potassium Hydrogen Phthalate standard for volumetry, ACS, ISO

Potassium Hydrogen Phthalate standard for volumetry, ACS, ISO
Content: 100 GRM
Physical Description:
solid
Quality Name: standard for volumetry, ACS, ISO
Primary Chemical Matter
Specification: Uncertainty: See certificate
Traceability: NIST
Assay (Acidim.) (after drying at 105°C): 99.95-100.05%
Identity: IR passes test
pH sol. 0.05 mol/l at 25±0.2°C: 4.00-4.02

?maximum limit of impurities:
Insoluble matter in H2O: 0.003 %
Chloride (Cl): 0.002%
Nitrogen compounds (as N): 0.001%
Sulfur compounds (as S): 0.002 %
Chlorine compounds (as Cl): 0.003%
Heavy metals (as Pb): 0.0005%
Ca: 0.001 %
Cd: 0.0005 %
Co: 0.0005 %
Cr: 0.001 %
Cu: 0.0005 %
Fe: 0.0005 %
Mg: 0.001 %
Mn: 0.0005 %
Na: 0.005 %
Ni: 0.0005 %
Pb: 0.0005 %
Zn: 0.0005 %