Chemical name: O,O,O′,O′-tetramethyl O,O′-thiodi-p-phenylene bis(phosphorothioate) orO,O,O′,O′-tetramethyl O,O′-thiodi-p-phenylene diphosphorothioate
CAS no.: 3383-96-8

Structural formula:

Molecular formula: C₁₆H₂₀O₆P₂S₃
Physical & chemical property:
Physical State: Colourless crystals
Melting point: 30°C
Density: 1.32
Solubility: In water 0.03mg/l (25°C). Soluble in common organic solvents.
Stability: Hydrolysed by strong acids and alkalis. Do not store at temperatures above 49°C.
Specification: 50%EC, 60%EC
Uses: Control of larvae of Anopheles, Adeds, Culex, Simulium spp., etc., in public health and agricultural situations. Also used for controlling fleas on dogs and cats, and lice on humans.