Tellurium dioxide

Tellurium dioxide (CAS 7446-07-3, EC 231-193-1, formula O2Te) is an inorganic oxide of tellurium in its +4 oxidation state, also referred to commercially as telluria or tellurium(IV) oxide. It carries no assigned E-code and is classified under the Salts & Minerals category.

In electronics manufacturing, tellurium dioxide is used in acousto-optic devices, where its high acoustic velocity and optical transparency enable precise light modulation in laser systems. It also serves as a catalyst in selective oxidation reactions, facilitating controlled conversion of organic substrates in fine chemical synthesis.

This material is supplied as a white crystalline powder and is subject to REACH registration requirements within the European Economic Area. Procurement teams should confirm supplier SDS documentation and purity grade specifications prior to ordering. HS code 28112900 applies for customs classification across EU member states.