“…Drug concentration plays a vital role in the degradation as it may affect the reaction rate. 61,76 Dilute solutions of drugs are known to be more prone to degradation than concentrated ones. 74,76,77 Therefore, the effect of TA concentration on the photodegradation rate has also been ascertained by exposing doublestrength stock solution (i.e., 4.0 × 10 −4 M) in different organic solvents to the same intensity UV light under similar experimental conditions.…”