I-Antimony(III) Oksidiyi-inorganic compound kunye nefomulaSb2O3. I-Antimony Trioxideyikhemikhali yoshishino kwaye yenzeka ngokwemvelo kokusingqongileyo. Yeyona khompawundi ibalulekileyo yorhwebo ye-antimony. Ifumaneka kwindalo njengeminerali i-valentine kunye ne-senarmontite.Ai-antimony Trioxideyikhemikhali esetyenziselwa ukwenziwa kweplastiki ye-polyethylene terephthalate (PET), esetyenziselwa ukwenza izitya zokutya neziselo.I-Antimony Trioxideyongezwa kwezinye iiretardants zomlilo ukuze zisebenze ngakumbi kwiimveliso zabathengi, kubandakanywa nefenitshala ephakanyisiweyo, amalaphu, iikhaphethi, iiplastiki kunye neemveliso zabantwana.