Understanding Photostability: Importance and Measurement Methods

Photostability refers to the ability of a substance to resist degradation or discoloration when exposed to light. In other words, it means that the substance does not break down or change color when exposed to light over time. This property is important in many applications, such as in the development of drugs, cosmetics, and plastics, where the product needs to maintain its stability and effectiveness over a long period of time.

Photostability can be measured using various methods, including spectroscopy and chromatography. The photostability of a substance can also be affected by factors such as temperature, pH, and the presence of other chemicals.

In general, photostable substances are more stable and less likely to degrade or change color when exposed to light, while non-photostable substances may degrade or change color over time.