Dichlorodiphenyldichloroethane

Dichlorodiphenyldichloroethane (DDD) is an organochlorine insecticide that is slightly irritating to the skin. DDD is a metabolite of DDT. DDD is colorless and crystalline; it is closely related chemically and is similar in properties to DDT, but it is considered to be less toxic to animals than DDT. The molecular formula for DDD is (ClC6H4)2CHCHCl2 or C14H10Cl4, whereas the formula for DDT is (ClC6H4)2CHCCl3 or C14H9Cl5.

Dichlorodiphenyldichloroethane
Names
IUPAC name
1-chloro-4-[2,2-dichloro-1-(4-chlorophenyl)ethyl]benzene
Preferred IUPAC name
1,1′-(2,2-dichloroethane-1,1-diyl)bis(4-chlorobenzene)
Identifiers
3D model (JSmol)
Abbreviations DDD
4-05-00-01884
ChEBI
ChEMBL
ChemSpider
ECHA InfoCard 100.000.712
EC Number
  • 200-783-0
KEGG
MeSH DDD
UNII
  • InChI=1S/C14H10Cl4/c15-11-5-1-9(2-6-11)13(14(17)18)10-3-7-12(16)8-4-10/h1-8,13-14H Y
    Key: AHJKRLASYNVKDZ-UHFFFAOYSA-N Y
  • InChI=1/C14H10Cl4/c15-11-5-1-9(2-6-11)13(14(17)18)10-3-7-12(16)8-4-10/h1-8,13-14H
    Key: AHJKRLASYNVKDZ-UHFFFAOYAJ
  • Clc1ccc(cc1)C(c2ccc(Cl)cc2)C(Cl)Cl
Properties
C14H10Cl4
Molar mass 320.03 g·mol−1
Appearance Colorless and crystalline
Density 1.476 g/cm3
Melting point 109.5 °C (229.1 °F; 382.6 K)
Boiling point 350 °C (662 °F; 623 K)
0.09 mg/L
log P 6.02 (octanol-water)
Vapor pressure 1.35×10−6 mm Hg
6.6×10−6 atm ∙ m3/mol
Atmospheric OH rate constant
 4.34×10−12 cm3/molecule ∙ s
Related compounds
Related compounds
 DDE, DDT, mitotane, perthane
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Y verify (what is YN ?)
Infobox references

DDD is in the “Group B2” classification, meaning that it is a probable human carcinogen. This is based on an increased incidence of lung tumors in male and female mice, liver tumors in male mice, and thyroid tumors in male rats. A further basis is that DDD is similar to and is a metabolite of DDT, another probable human carcinogen.

DDD is no longer registered for agricultural use in the United States, but the general population continues to be exposed to it due to its long persistence time. The primary source of exposure is oral ingestion of food.

1946 is the date of the earliest recorded use in English of the abbreviation “DDD” to stand for dichlorodiphenyldichloroethane, as far as could be determined.

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