2957. DFDT

Nomenclature

CAS number: 475-26-3
1,1′-(2,2,2-Trichloroethylidene)bis[4-fluorobenzene]; 1,1,1-trichloro-2,2-bis(p-fluorophenyl)ethane; difluorodiphenyltrichloroethane; fluorogesarol; HO-2474; Gix.
C14H9Cl3F2; mol wt 321.58.
C 52.29%, H 2.82%, Cl 33.07%, F 11.82%.

Description and references

Prepn: Sumerford, J. Am. Pharm. Assoc. 36, 127 (1947); Cross, US 2581174 (1952). Toxicity: Piekarski, Holz, Arch. Exp. Pathol. Pharmakol. 210, 71 (1950).

Chemical structure

Properties

Crystals from aq ethanol, mp 44-45°. Practically insol in water; very sol in oils, most organic solvents.

Caution

Effects similar to DDT [1,1,1-trichloro-2,2-bis(p-chlorophenyl)ethane], q.v.

Use

Contact insecticide.