Appearance:
White, or almost white crystalline granules.
Assay (HPLC):
On dry: 96.6 - 100.5%.
Absorbance at 425 nm:
(10% w/v in buffer pH 9.2 after filtration,
measured in a 1 cm cell)
<0.050.
Appearance of solution: (Ph.Eur.):
not more opalescent than
reference suspension II.
pH (Ph.Eur.):
3.5 - 5.5.
Water (Karl Fischer):
<1.0%.
Dimethylaniline:
Absent.
Particle size (sieve method):
max 40%: < 250 µm
60 -
95%: 250 - 1000 µm
min 95%: < 1000 µm
Tapped bulk density (DIN ISO 787):
>0.80 g/ml.
Shelf life:
Minimum 4 years in the original packaging under
'storage conditions'.
Storage conditions:
Below 25 °C, protected from light and moisture.