Title: Tetradifon
CAS Registry Number: 116-29-0
CAS Name: 1,2,4-Trichloro-5-[(4-chlorophenyl)sulfonyl]benzene
Additional Names: p-chlorophenyl 2,4,5-trichlorophenyl sulfone; 2,4,5,4¢-tetrachlorodiphenyl sulfone; tedion
Trademarks: Tedion-V18 (Solvay Duphar)
Molecular Formula: C12H6Cl4O2S
Molecular Weight: 356.05
Percent Composition: C 40.48%, H 1.70%, Cl 39.83%, O 8.99%, S 9.01%
Literature 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).
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).
Melting point: mp 146.5-147.5°
Toxicity data: LD50 orally in rats: 556 mg/kg (Ben-dyke)
Use: Acaricide. Ovicide on deciduous fruits, citrus, cotton and other crops.

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