SPECTRUM

Chemical Fact Sheet

Chemical Abstract Number (CAS #) 52857
CASRN 52-85-7
SynonymsFamphur
Famophos
Phosphorothioic acid, O,O-dimethyl O-[p-[(dimethylamino) sulfonyl]phenyl] ester
Analytical Methods EPA Method 622.1
EPA Method 8141
Molecular FormulaC10H16NO5PS2

Link to the National Library of Medicine's Hazardous Substances
Database for more details on this compound.

Use VET: INSECTICIDE (GRUBICIDE) Vet: Bo-Ana is used as an insecticide for control of lice infestations FAMPHUR POUR-ON SYSTEMIC CATTLE INSECTICIDE IS AN INSECTICIDE FOR CONTROL OF CATTLE GRUB AND LICE INFESTATIONS. FOR GRUB CONTROL, APPLY AS SOON AS POSSIBLE AFTER HEEL FLY ACTIVITY CEASES. FOR LICE CONTROL, APPLY BO-ANA AT START OF LICE SEASON. ANIMALS MAY BE RETREATED AFTER 40 DAYS.
Apparent Color CRYSTALS; CRYSTALLINE POWDER
Melting Point 52.5-53.5 DEG C
Molecular Weight 325.36
Environmental Impact Famphur is used as an insecticide to control grubs, lice, and flies, and to reduce infestations. It may enter the environment as a fugitive emission during its manufacture and formulation, or during its application as an insecticide. If released to water, famphur is expected to undergo slow hydrolysis; an experimentally determined half-life of 115 days has been determined under neutral conditions. Hydrolysis under basic conditions will occur at a more rapid rate, with a calculated half-life value of 60 days at pH 10. Famphur may adsorb to sediment and suspended organic matter, but it is not expected to bioconcentrate in fish and aquatic organisms. If released to soil, slow hydrolysis may occur in this media. Occupational exposure to famphur may occur during its manufacture and formulation, and during its application as an insecticide.
Environmental Fate TERRESTRIAL FATE: If released to soil, a calculated Koc of 419(1,2,SRC) suggest that famphur will display moderate mobility, and may adsorb to soil . Hydrolysis in moist soils may occur, by analogy to its behavior in water , however, it is not expected to be a rapid fate process. AQUATIC FATE: Hydrolysis under neutral conditions is expected to occur slowly, as an experimental half-life of 115 days has been obtained . Hydrolysis in basic waters is expected to occur at a more rapid rate, with an experimental half-life of 6 and 60 days at pH 11 and pH 10, respectively(1,SRC). A calculated Koc of 419(2,SRC), based on the estimated log Kow, 2.289 , suggests that famphur would be expected to adsorb to sediment and suspended organic matter. A calculated bioconcentration factor of 31.8(2,SRC), also based on log Kow , suggests that bioconcentration in fish and aquatic organisms is not expected to be a significant fate process.

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