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Mass spectrum of ronnel


A non-US trademark for a light brown, solid Insecticide. Ronnel is an organophosphate compound that works as a cholinesterase inhibitor. It has been used on livestock and dogs to kill fleas, ticks, and flies. Ronnel was formerly used in household formulations for cockroaches, termites, and ants. The crystalline powder was patented by Bayer in 1948.

Synonyms and Related Terms

phosphorothioic acid; O,O-dimethyl-O-(2,4,5 trichlorophenyl)phosphorothioate; fenchlorophos; fenchlorphos; dimethyl trichlorophenyl thiophosphate; trichlormetaphos



Chemical structure


Other Properties

Soluble in most organic solvents. Insoluble in water.

Composition (CH3O)2P(S)OC6H2Cl3
CAS 299-84-3
Melting Point 41
Density 1.485
Molecular Weight mol. wt. = 321.57
Boiling Point 97

Hazards and Safety

Toxic by ingestion and inhalation. Skin contact causes irritation.

LINK: International Chemical Safety Card

Sources Checked for Data in Record

  • Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
  • Pam Hatchfield, Pollutants in the Museum Environment, Archetype Press, London, 2002
  • The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 8415
  • The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998

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