Butylated hydroxytoluene (BHT) is used as an antioxidant in processed foods (it prevents fats and oils from becoming rancid). A solution of 2.500 g of BHT in 100.0 g of benzene had a freezing point of Tf = 4.880 °C. What is the molar mass of BHT? The normal freezing point of benzene is 5.5 °C and Kf (benzene) = 5.12 °C/m.