Impurity testing is crucial to provide purity, safety and quality control for APIs and drug products. Pharmaceutical impurities may come from different sources, such as: starting materials, reagents, solvents, intermediates, degradation products and excipients and can be both of organic and inorganic origin.

What removes impurities and clean the surface before soldering? Flux is used in both manual hand soldering as well as the different automated processes used by PCB contract manufacturers. The main purpose of the flux is to prepare the metal surfaces for soldering by cleaning and removing any oxides and impurities.

Define impurity. impurity synonyms, impurity pronunciation, impurity translation, English dictionary definition of impurity. n. pl. im·pu·ri·ties 1. The quality or.