Citric acid is a useful buffering substance, pKa1 =3.13, pKa2=4.76, pKa3 =6.40 at 25ºC. Molecular biology grade anhydrous citric acid is suitable for use in tissue culture systems requiring additives.
M | 192.13 |
---|---|
m.p | 153 - 154.5 °C |
Chloride (Cl) | max. 0.001% |
---|---|
Subs. darkened by Sulfuric Acid | Passes test |
Oxalate (C2O4) | max. 0.05% |
Heavy metals (as Pb) | max. 0.001% |
Assay (T) | min. 99.5%w/w |
Water (KF) | max. 0.5%w/w |
DNase activity | Not detected |
RNase activity | Not detected |
Protease activity | Not detected |