| Description |
Colourless crystals or a white powder; slightly. hygroscopic in moist air
|
Solubility |
Very soluble in water; freely soluble in ethanol (95%); sparingly soluble in ether
|
| Identification 'A' ( by IR) |
The infrared absorption spectrum of the sample should be concordant to that of the standard
|
Identification 'B' |
It should gives the reaction (A) of citrate
|
| Identification 'C' |
Solution should be strongly acidic
|
Appearance of solution |
The solution should clear, and not more intensely coloured than reference solution YS7, BYS7 or GYS7
|
| Arsenic |
NMT 1 ppm
|
Barium |
Any opalescence produced should not more intense than that of a mixture of 5 ml of solution A and 5 ml of distilled water
|
| Oxalic acid |
Any pink colour produced should not more intense than that produced by carrying out the test using 0.2 mg of oxalic acid dissolved in 4 ml of water
|
Readily carbonisable substance |
Any colour produced should not more intense than that of a mixture of 1.0 ml of CCS and 9.0 ml of FCS
|
| Assay (on anhydrous basis) |
99.0 – 101.0%
|