Abstract
Butyl hydroxy anisole (BHA) was irradiated in soybean oil for 70 days and in lard for 40 days under sunlight, affording 3, 3′-di-tert-butyl-2, 2′-di-hydroxy-5, 5′-di-methoxy diphenyl (A) and 2′, 3-di-tert-butyl-2-hydroxy-4′, 5-di-methoxy diphenyl ether (B).
Under high concentration (5%) of BHA, compound A was more formed than B and under low concentration (0.5%), B was more formed than A.
Rapid rancidity of fat and oil was occurred after disappearance of BHA and photolytic products (A, B).
