| Chemical Abstract Number (CAS #) |
52857
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| Synonyms | Famphur |
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Famophos | Phosphorothioic acid, O,O-dimethyl O-[p-[(dimethylamino) sulfonyl]phenyl] ester |
| Analytical Methods |
EPA Method 622.1 |
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EPA Method 8141A |
| Molecular Formula | C10H16NO5PS2 |
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| 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.
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| Apparent Color | CRYSTALS; CRYSTALLINE POWDER
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| Melting Point | 52.5-53.5 DEG C
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| Molecular Weight | 325.36
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| 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.
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| 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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