Free acid
Buffer reagent according to Good. High buffer capacity at physiological pH-values.
Assay (titr.) | ≥99,5 % |
Solubility (0,1 M in H2O) | clear, complete |
pH value (5 % in H2O) | 5,0-6,0 |
Sulphated ash | ≤0,1 % |
Loss of drying (140 °C, 30 min) | ≤0,2 % |
Chloride (Cl) | ≤0,005 % |
Phosphate (PO4) | ≤0,01 % |
Sulphate (SO4) | ≤0,01 % |
Lead (Pb) | ≤0,0005 % |
Cadmium (Cd) | ≤0,0005 % |
Calcium (Ca) | ≤0,05 % |
Iron (Fe) | ≤0,0005 % |
Copper (Cu) | ≤0,0005 % |
Magnesium (Mg) | ≤0,0005 % |
Nickel (Ni) | ≤0,005 % |
Heavy metals (as Pb) | ≤0,0005 % |
Absorbance | |
260 nm | ≤0,05 |
280 nm | ≤0,04 |
405 nm | ≤0,03 |