Abstract: The article studied the antioxidative effect of thiodipropinic acid (TDPA) which is not yet listed in the hygienic standards as food additives for oil in our country (GB2760- 1996) .The antioxidative effects of TDPA,BHA .BHT .TBHQ and DLTP were separately compared with each other and the synergistic effects of TDPA. The results showed that TDPA was a highly effective antioxidant It has a high potential value of application.

Key words: Thiodipropinic acid Oxidation of oil and fat Antioxidant