Profile: Pat Impex is a supplier, manufacturer, and dealer of various chemicals, pharmaceutical ingredients, sweetener, and active pharmaceutical ingredients (APIs). We provide industrial chemicals, catalysts, and polymers. Tertiary butyl hydroquinone (TBHQ) is a synthetic food grade antioxidant, that is used to stabilize foods, fats and vegetable oils against oxidative deterioration and thus extending their storage life. Basically in simple terms TBHQ can be called a chemical that is used as a preservative. It helps in preserving food products. There is a natural antioxidant called tocopherol that is present in vegetable oils that is insufficent for oxidative stability, even if external tocopherol is added to the vegetable oil which does not increase the stability hence a synthetic antioxidant is required.