Intermediate for Donepezil
S.No. TEST SPECIFICATION
1.0 Description A light yellow to light brown coloured crystalline powder.
2.0 Identification By HPLC The retention time of principle peak in the chromatogram of Test solution correspods to that of principle peak in the chromatogram of Reference solution, as obtained in the test of purity by HPLC.
3.0 Moisture Content NMT 0.5 %
4.0 Melting Point 117-121°C
5.0 Loss on drying NMT 0.5 %
6.0 Releted Substances By HPLC
6.1; Purity NLT 99.0 %
6.2; Single maximum impurity NMT 0.50%