Cerium(IV) oxide

Cerium(IV) oxide, commonly known as ceria or ceric oxide and abbreviated as CeO2 (CAS 1306-38-3, EC 215-150-4), is an inorganic rare-earth compound derived from the lanthanide element cerium. It carries no assigned E-code and is classified under HS code 28461000.

In personal care formulations, CeO2 functions as an antimicrobial agent and skin protectant by generating reactive oxygen species that disrupt microbial cell membranes while forming a protective barrier on skin surfaces. In printing and packaging applications, it acts as a surface modifier, improving ink adhesion and substrate wetting through its ability to alter surface energy at the interface.

CeO2 is supplied as a white to faintly yellow powder in technical and high-purity grades compliant with REACH regulations. Procurement quantities are available in kilogram and bulk formats. Buyers should confirm grade specifications against application requirements, as purity levels vary between cosmetic and industrial uses.