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| What is the maximum safe use level for Tenox TBHQ antioxidant in cosmetic/personal care products? |
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| The Cosmetic, Toiletry, and Fragrance Association (CTFA) Cosmetic Ingredient Review (CIR) panel have reviewed the safety of t-butyl hydroquinone. They concluded that “t-butyl hydroquinone may be safely used as a cosmetic ingredient at concentrations not to exceed 0.1 percent” (J. Am. Coll. Toxicol. 10(1), 1991).
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