ts consisting predominantly of p,p ′-DDT, but also containing smaller amounts of other compounds ( WHO, 1989 ). Chem. Abstr. Serv. Name : 1,1′-(2,2,2-trichloro-ethylidene)-bis(4-chlorobenzene) Chem. Abstr. Serv. Reg. No.: 50-29-3 Preferred IUPAC Name : 1-chloro-4-[2,2,2-trichloro-1-(4-chlorophenyl)ethyl]benzene Synonyms : dichlorodiphenyltrichloroethane; DDT; 1,1,1-trichloro-2,2-bis( para -chlorophenyl)ethane; α,α-bis( para -chlorophenyl)-β,β,β-trichloroethane; 1,1-bis( para -chlorophenyl)-2,2,2-trichloroethane; 2,2-bis( para -chlorophenyl)-1,1,1-trichloroethane; 4,4′-DDT; 4,4′-dichlorodiphenyltrichloroethane; p,p′- DDT; para , para ′-dichlorodiphenyltrichloroethane; OMS 0016; 1,1,1-trichloro-2,2-bis(4,4′-dichlorodiphenyl)ethane; 2,2,2-trichloro-1,1-bis(4-chlorophenyl)ethane; trichlorobis(4′-chlorophenyl)ethane; TbisC-ethane; benzene, 1,1′-(2,2,2-trichloroethylidene)-bis(4-chloro-). Trade Names: DDT has been used in many commercial product formulations. It is not possible to prepare an exhaustive list of all trade names that have been or are being used currently. Trade names specified below are presented as examples. Agritan; Arkotine; Benzochloryl; Bovidermol; Chlorophenothane; Chlorphenotoxum; Clofenotane; Detoxan; Dicophane; Didigam; Didimac; Estonate; Genitox; Gesafid; Parachlorocidum; Pentachlorin; Penticidum. From NCBI (2015) and ChemIDplus (2015) unless otherwise specified. The World Health Organization (WHO) specification for technical-grade DDT intended for use in public health programmes requires that the product contains a minimum of 70% p , p ′-DDT ( WHO, 2009 ). Technical-grade DDT typically also contains smaller amounts of other compounds such as o,p′- DDT, p,p′- DDD (1-chloro-4-[2,2-dichloro-1-(4-chlorophenyl)ethyl]benzene, also known as TDE), o,p′- DDE (1,1-dichloro-2,2-bis( p -chlorophenyl) ethylene) ( WHO,