|
Appearance
|
A yellow to orange yellow crystalline powder
|
|
Solubility
|
Very slightly soluble in water, practically insoluble in ethanol (96 per cent)
|
|
Assay (spectrophotometric; on dried basis)
|
98 - 101%
|
|
Identification 'A' & 'B'
|
To pass IP tests
|
|
pH
|
5.5 to 7.2
|
|
Specific optical rotation
|
-115° to -135°
|
|
Light absorption
|
-
|
|
at A373 nm/A267 nm
|
0.31 - 0.33
|
|
at A444 nm/A267 nm
|
0.36 - 0.39
|
|
Lumiflavine
|
To pass IP test
|
|
Loss on drying (at 105°C)
|
Max 1.5%
|
|
Sulphated ash
|
Max 0.1%
|