| Chemical Abstract Number (CAS #) |
2631370
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| Synonyms | Promecarb |
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Carbamic acid, methyl-, m-cum-5-yl ester | Phenol, 3-methyl-5-(1-methylethyl)-, methylcarbamate | Carbamult |
| Molecular Formula | C12H17NO2 |
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| Use | INSECTICIDE (NON-US USE ONLY)
Promecarb is used as a non-systemic contact insecticide against lepidopterous pests and leaf
miners of fruits.
For Colorado potato beetle, corn rootworm.
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| Apparent Color | COLORLESS CRYSTALLINE SOLID
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| Odor | ALMOST ODORLESS
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| Boiling Point | 117 DEG C AT 0.1 MM HG
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| Melting Point | 87-87.5 DEG C
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| Molecular Weight | 207.28
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| Environmental Impact | Promecarb is released directly into the environment from its application and use as a
contact insecticide. If released to the atmosphere, gas-phase promecarb is expected to degrade
rapidly (estimated half-life of 5 hr) by reaction with photochemically produced hydroxyl radicals.
Particulate-phase promecarb may be removed physically from air by wet and dry deposition. If
released to water, hydrolysis appears to be an important degradation process. The aqueous
hydrolysis half-life has been estimated to be 1.2 days at 25 deg C and pH 7; the hydrolysis rate is
expected to increase under alkaline conditions, but may decrease significantly in acidic natural
waters. If released to soil, promecarb is expected to degrade chemically under moist conditions
via hydrolysis with the rate increasing under alkaline conditions and decreasing under acidic
conditions. Promecarb may leach moderately in soil, although leaching in neutral and alkaline soils
may not be important due to concurrent hydrolysis. The N-methylcarbamate pesticides (of which
promecarb is a member) are generally biodegradable and of low soil persistence. Occupational
exposure to promecarb may be possible through dermal contact and inhalation to workers
involved with applying or formulating promecarb pesticides.
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| Environmental Fate | TERRESTRIAL FATE: The N-methylcarbamate pesticides (of which promecarb is a
member) are generally biodegradable and of low soil persistence . Chemical degradation of
promecarb in moist soil is expected to proceed via hydrolysis. The aqueous hydrolysis half-life has
been estimated to be 1.2 days at 25 deg C and pH 7; the hydrolysis rate is expected to increase
under alkaline conditions, but decrease with acidity in soil. Promecarb is expected to have low to
moderate soil mobility which suggests that some leaching may be possible. Leaching in neutral
and alkaline soils may not be significant, however, due to concurrent hydrolysis.
AQUATIC FATE: Hydrolysis appears to be an important degradation process for promecarb in
water. The aqueous hydrolysis half-life has been estimated to be 1.2 days at 25 deg C and pH
7 ; the hydrolysis rate is expected to increase under alkaline conditions, but may decrease
significantly in acidic in natural waters.
ATMOSPHERIC FATE: Based upon a vapor pressure of 0.00003 mm Hg at 25 deg C ,
promecarb can be expected to exist in both the gas phase and particulate phase in the ambient
atmosphere(2,SRC). Gas phase promecarb is expected to degrade rapidly in air by reaction with
photochemically produced hydroxyl radicals; the half-life for this reaction in an average
atmosphere has been estimated to be about 5 hr. Particulate phase promecarb may be physically
removed from air via wet and dry deposition.
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