https://www.selleckchem.com/pr....oducts/bzatp-triethy
The preparation of solutions often requires more than one solvent in the vehicle. When an additional solvent is added to a primary solvent, this additional solvent is called a "cosolvent." Cosolvents must be carefully selected to be compatible with the other ingredients in the formulation, to be nontoxic, and to be safe for the patient. One method of approximating the cosolvent and its concentration to be used involves the consideration of the dielectric constant. Although not exact, it can be helpful and is relative