IPA Drying procedure in FBD

Production
1

What is the drying procedure of IPA (Solvents) in FBD. What is the temperature range for this and why?

2

IPA boiling point is 82 degree C. So you have to dry your product at around 65C.
As per ICH, residual limit for IPA is 5000 PPM.

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3

or 60±2C
Thanks