Solubility studies of silver sulfadiazine

Area of Science:

• Pharmaceutical Chemistry
• Analytical Chemistry

Background:

• Silver sulfadiazine is a widely used antimicrobial agent.
• Understanding its solubility is crucial for formulation and efficacy.

Purpose of the Study:

• To determine the solubility of silver sulfadiazine across a range of pH values.
• To investigate the relationship between pH and silver sulfadiazine solubility.
• To confirm the ionization state of silver sulfadiazine in aqueous solutions.

Main Methods:

• Solubility measurements were performed using nitric acid-potassium nitrate buffer (pH 2-3) and 2-(N-morpholino)ethanesulfonic acid buffer (pH 6-7).
• Silver ion concentration was quantified using a silver-ion selective electrode.
• Known subtraction and known addition methods were employed for accurate silver ion measurement.

Main Results:

• Silver sulfadiazine solubility increased as pH decreased (increased hydrogen-ion concentration).
• The observed solubility trend aligns with the behavior of a weak organic acid salt.
• Experimental data indicated complete ionization of silver sulfadiazine in the tested aqueous solutions.

Conclusions:

• Silver sulfadiazine exhibits pH-dependent solubility, increasing in acidic conditions.
• The compound is fully ionized in aqueous environments.
• Accurate measurement of silver ion concentration is feasible using selective electrodes and appropriate titration techniques.