Slide 2 -
Butylated hydroxy anisole is a mixture of two isomers. Referred to as a 'hindered phenol' because of the proximity of the tertiary butyl group to the hydroxyl group. This may hinder the effectiveness in vegetable oils, but increase the 'carry through' potency for which BHA is known.
Uses: Lard, shortenings, vegetable oils, cereals, package liners, potato products, dry soups, chewing gum, etc. Usually in combination with other primary antioxidants.
Three hydroxyl groups make it very reactive. Lower solubility. Tend to chelate trace minerals such as iron and form colored complexes. Are heat labile, especially under alkaline conditions.
Uses: Lard, shortening, vegetable oils, cereals, package liners, animal feeds, etc. Used alone and in combination with BHA or PG and citric acid.
Butylated hydroxy toluene is also a 'sterically hindered' phenol Susceptible to loss through volatilization in high temperature applications.
Uses: Lard, shortening, vegetable oils, cereals, animal feeds, etc. Usually used in combination with BHA or BHT and citric acid.
Tertiary-butylatedhydroquinone is an extremely potent antioxidant. Had been used extensively in non food applications prior to gaining approval in food.
Uses: Lard, cottonseed oil, potato chips, corn flakes