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. 2021 Jun 21;38(7):1297–1306. doi: 10.1007/s11095-021-03068-y

Table II.

Solubility of APIs

API pH of medium Solubility mg/ml Descriptive Term Ref.
Metformin hydrochloride 6.7 307.9 freely (36,37)
Alfuzosin hydrochloride 6.6 235 freely (38)
Theophylline 6.8 11.6 slightly (39)
Trimetazidine hydrochloride 6.7 340 freely (40)
Quetiapine fumarate 6.8 1.0 slightly (41)