9198. Tetradifon

Nomenclature

CAS number: 116-29-0
1,2,4-Trichloro-5-[(4-chlorophenyl)sulfonyl]benzene; p-chlorophenyl 2,4,5-trichlorophenyl sulfone; 2,4,5,4′-tetrachlorodiphenyl sulfone; tedion; Tedion-V18 (Solvay Duphar).
C12H6Cl4O2S; mol wt 356.05.
C 40.48%, H 1.70%, Cl 39.83%, O 8.99%, S 9.01%.

Description and references

Prepn: Meltzer, Huisman, US 2812281 (1957 to Phillips); and soly data: Huisman et al., Rec. Trav. Chim. 77, 103 (1958). Toxicity study: Ben-dyke et al., World Rev. Pest Control 9, 119 (1970).

Chemical structure

Properties

Crystals from benzene; mp 146.5-147.5°. Stable to concd and dil alkalies, mineral acids, high temp, and uv light. LD50 orally in rats: 556 mg/kg (Ben-dyke).

Use

Acaricide. Ovicide on deciduous fruits, citrus, cotton and other crops.