Butylated Hydroxytoluene – BHT (Food Grade)
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Butylated hydroxytoluene (BHT), also known as butylhydroxytoluene or ionol, is alipophilic organic compound, chemically a derivative of phenol, that is useful for itsantioxidant properties. European and U.S. regulations allow small percentages to be used as a food additive. The chemical is widely used in industry wherever oxidation in fluids (e.g. fuel, oil) and other materials must be treated, and free radicals must be kept in check
Butylated Hydroxytoluene is primarily used as a food additive that exploits its antioxidant properties. It is approved for use in European Union under E321 and in the U.S. by the Food and Drug Administration via regulation: For example, 21 CFR §137.350(a)(4) allows BHT up to 0.0033% by weight in “enriched rice”, while 9 CFR §381.147(f)(1) allows up to 0.01% in poultry “by fat content”. BHT is also documented as an antioxidant additive in such diverse products as cosmetics, pharmaceuticals, rubber, electrical transformer oil (at 0.35%) and embalming fluid. In the petroleum industry, where BHT is known as the fuel additive AO-29, it also finds uses inhydraulic fluids, turbine and gear oils, and jet fuels, among other applications. BHT is also used to prevent peroxide formation in diethyl ether and other laboratory chemicals.