Identification test
Chemical Tests
Legal test: The extract is dissolved in pyridine, sodium nitroprusside solution is added to it and made alkaline-pink or red colour is produced.
Baljet test:
To a section of digitalis, sodium picrate solution is added. It shows yellow to orange colour.
(1) Foreign organic matter - Not more than 2 per cent
(2) Loss on drying - Not more than 5 per cent w/w, by drying to constant weight at 105°C.
(3) Acid-insoluble ash - Not more than 5 percent.