In USP : Loss on drying : Dry it at a pressure of about 50 mm of mercuric at 70 C for 4 hours: it loses not more than 1.0% of it weight
I have only hot air oven / don't have vacuum oven.
I can use hot air oven intead vacuum oven ????
If I can What status as pressure of about 50 mm of mercuric at 70 C
help me please , thank you very much