Solubility expressions

1. Solubility expressions
Mr.Shashikant D. Modekar
Sojar College of
Pharmacy,Khandvi

2. Learning objectives
Upon completion of this topic the student
should be able to…….
Understand Solubility expressions.

3. Introduction
The USP lists the solubility of drugs as: the
number of ml of solvent in which 1g of solute
will dissolve.
E.g. 1g of boric acid dissolves in 18 mL of
water, and in 4 mL of
glycerine.

4. Solubility expressions
Substances whose solubility values are not
known are described by the following terms:

5. BCS
Biopharmaceutics Classification System
BCS is a scientific framework for classifying
Drug substances
according to their aqueous solubility and their
intestinal permeability