Where can I get a list of what salts are attached to the API like metformin has HCl attached and sitagliptin has phosphate attached
How can i setup manufacturing plants in india
The most reliable source of information will be pharmacopoeias such as IP, BP, USP, Ph. Eur, etc.
Please refer to the monographs of APIs and their salts in the above-referred pharmacopoeias (Table of contents).