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or bis(2,4-di-tert-butylphenyl)phosphate is a degradation product of tris(2,4-di-tert-butylphenyl)phosphite, also known under the trade name Irgafos 168, which is present in many polyethylene-based films. For CHO cells bDtBPP is the first leachable component whose cytotoxicity in small concentrations of  0.1 mg L-1 was experimentally proven 2.  See antioxidants, bags, film manufacture and leachables.