I-Antimony(III) oxideiyinhlanganisela ye-inorganic nefomulaSb2O3. I-Antimony Trioxideiyikhemikhali yezimboni futhi ivela ngokwemvelo endaweni ezungezile. Iyingxenye yezohwebo ebaluleke kakhulu ye-antimony. Itholakala emvelweni njengamaminerali i-valentine ne-senarmontite.Ai-antimony trioxideikhemikhali esetshenziswa ekwenzeni ipulasitiki ye-polyethylene terephthalate (PET), esetshenziselwa ukwenza iziqukathi zokudla neziphuzo.I-Antimony Trioxideiphinde yengezwe kwezinye izinqamuleli zamalangabi ukuze zisebenze kangcono emikhiqizweni ethengwayo, okuhlanganisa ifenisha ekhuphukisiwe, izindwangu, ukhaphethi, amapulasitiki, kanye nemikhiqizo yezingane.