tert-Butylphenyl Diphenyl Phosphate (CAS No. 56803-37-3): 5-Day Rat Gavage Toxicogenomic Study

tert-Butylphenyl Diphenyl Phosphate (BPDP) is an organophosphate flame retardant currently on the market and used as a replacement for phased-out polybrominated diphenyl ethers. Toxicity information on this class of chemicals is inadequate. Herein, the NTP use short-term, in vivo transcriptomic studies to inform potential points of departure for BPDP. The National Toxicity Program (NTP) conducted a transcriptomic study on BPDP, in male Harlan Sprague Dawley rats. BPDP was dissolved in corn oil. Exposure was once daily for 4 days by oral gavage. BPDP (>99%) was tested at six doses (0, 65, 129, 258, 516, and 1033 mg/kg body weight). On Day 5, animals were sacrificed, standard toxicological measures assessed, and the liver taken for gene expression studies using Affymetrix microarrays. contributor: National Toxicology Program