The Significance of CAS Numbers in Cosmetic Formulation In the realm of cosmetic formulation, understanding the intricacies of ingredient identification is paramount. While many budding formulators are well-acquainted with INCI (International Nomenclature of Cosmetic Ingredients) names, there's another crucial identifier that often goes underappreciated: CAS numbers. Unlike INCI names, which provide a general overview of the composition of a substance, CAS (Chemical Abstracts