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Disinfection byproducts (DBPs) are chemicals that form during drinking water treatment and distribution when naturally occurring organic matter reacts with chlorine or other disinfectants used to kill pathogenic organisms. EPA has determined that four of these chemicals, or classes of chemicals, pose potential health risks and must be regulated.

Dibutyl phthalate ( DBP) is an organic compound which is commonly used as a plasticizer because of its low toxicity and wide liquid range. With the chemical formula C 6 H 4 (CO 2 C 4 H 9) 2, it is a colorless oil, although commercial samples are often yellow. [3] Production and use [ edit]

DBP Contaminant Limits and Compliance Calculations Total trihalomethanes (TTHMs) include chloroform, bromoform, bromodichloromethane, and dibromochloromethane. The Maximum Contaminant Level or MCL for TTHM is 80 g/L (equal to 0.080 mg/L).

DBP is an oily liquid that belongs to a family of chemicals called phthalates, which are added to some plastics to make them flexible. DBP is used in various consumer products, including:

In the following example, the glass forming dibutyl phthalate (DBP), with a glass temperature Tg =178 K, was investigated by NFS (sensitive to translational and rotational dynamics) and SRPAC (sensitive only to rotational dynamics) ( Sergueev et al., 2003 ). Ferrocene was used as probe molecules.