| 分子式 | |
| 其他事项 | 4.120162Potassium Hydrogen Phthalate, primary standard ACS-ISOC8H5KO4 M.=204.22CAS No. 877-24-7Assay (Acidim.) 99.95 ~ 100.05%pH (0.05 mol/l in H2O, at 25± 0.2℃) 4.00 ~ 4.02Insoluble matter in H2O ≤ 0.003%Cl compounds (as Cl) ≤ 0.003%Nitrogen compounds (as N) ≤ 0.001%Sulphur compounds (as S) ≤ 0.002%Chloride (Cl) ≤ 0.002%Heavy metals (as Pb) ≤ 0.0005%Ca ≤ 0.001% Mg ≤ 0.001%Cd ≤ 0.0005% Mn ≤ 0.0005%Co ≤ 0.0005% Na ≤ 0.005%Cr ≤ 0.001% Ni ≤ 0.0005%Cu ≤ 0.0005% Pb ≤ 0.0005%Fe ≤ 0.0005% Zn ≤ 0.0005% |
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