First of all, an impurity is an unwanted element that enters the composition of a product. Generally present in small quantities, an impurity can be an eliminatory element for the marketing of your products.
There are several types of impurities such as solvent residues, particles or nitrosamines.
Nitrosamines are widespread molecules present in many natural or synthetic products. Indeed, nitrosamines are found in a certain number of industrial products, in particular in the fields of food (as additives), plastics, cosmetics or even certain drugs (solvents).