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Chemical Fact Sheet

Chemical Abstract Number (CAS #) 2032599
CASRN 2032-59-9
SynonymsAminocarb
Phenol, 4-(dimethylamino)-3-methyl-, methylcarbamate
Metacil
4-Dimethylamino-3-cresyl methylcarbamate
Analytical Method EPA Method 632
Molecular FormulaC11H16N2O2

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

Use 100% AS AN INSECTICIDE IN CONTROL OF FOREST PESTS INCL SPRUCE WEBWORM & JACK PINE BUDWORM (1974) FORMER USE Control of lepidopterous larvae and other chewing insects in cotton, field crops, and in forestry. /Former use
Consumption Patterns 100% AS AN INSECTICIDE IN CONTROL OF FOREST PESTS INCL SPRUCE WEBWORM & JACK PINE BUDWORM (1974)
Apparent Color WHITE CRYSTALLINE SOLID ; TAN CRYSTALS
Melting Point 93-94 DEG C
Molecular Weight 208.26
Environmental Impact Aminocarb may be released in the environment during its use as an insecticide. If released to soil, aminocarb is expected to have a moderate high mobility in soils. Loss of aminocarb will occur primarily by hydrolysis and biodegradation. Loss of aminocarb from soil due to volatilization may not be important. The persistence of aminocarb in a forest soil was less than 8 days. In water, aminocarb appears to degrade as a result of hydrolysis, biodegradation and photolysis. The half-life of aminocarb in a creek water with a pH of 6.52 was 11.5 days. Aminocarb should not bioconcentrate in aquatic organisms. It should not volatilize from soil or water. In the atmosphere, reaction with photochemically produced hxydroxyl radicals will be an important loss processes for vapor phase aminocarb in the atmosphere. The half-life of aminocarb due to this reaction has been estimated to be less than 1 hr. Partial removal of aminocarb will also occur as a result of dry and wet deposition. Workers who apply the insecticide are the most likely people to be exposed to aminocarb. Exposure would be expected via inhalation and dermal contact.
Environmental Fate TERRESTRIAL FATE: Based on degradation studies in water , both biodegradation and hydrolysis may be the major processes for the degradation of aminocarb from soil. Because of the inability of sunlight to penetrate beyond soil surface, photolysis will not be important beyond the top layers of soil. Based on low estimated values for vapor pressure (1.88X10-6 mm Hg) and Henry's Law constant (5.64X10-10 atm cu m/mole), volatilization of aminocarb from dry and wet soil should not be important. The estimated Koc value of 100-210 indicates that aminocarb should exhibit high to moderate leaching in soil(4,SRC). The persistence of aminocarb in soil will depend on the soil type, moisture content, pH and the temperature of soil . In a conifer forest soil (sandy loam) of pH 6.2 and temperatures of 10-22.3 deg C, the persistence of aminocarb did not exceed 8 days . AQUATIC FATE: Aminocarb will degrade by a combination of hydrolysis, photolysis and biodegradation in water . The half-life of aminocarb in a creek water from Moncton, New Brunswick, Canada with a natural pH of 6.52 was 11.5 days . The hydrolysis of aminocarb in water will be faster at higher pH . In 14 days, 90% aminocarb degraded in Little Miami River water from Ohio and it was totally degraded in less than 4 weeks . Under field application conditions, residues of aminocarb disappeared rapidly (3-25 hrs) from water, sediment and fish . The log BCF value of less than 5(4-6) indicates that bioconcentration of aminocarb in aquatic organisms will not be important. ATMOSPHERIC FATE: Based on a vapor pressure of 1.88X10-6 mm Hg estimated from Henry's Law constant and water solubility , aminocarb may be present partially in the vapor phase and partially in the particulate form in air(3,SRC). Based on an estimation method , vapor phase aminocarb may be removed from the atmosphere with a half-life of less than 1 hr. due to reaction with photochemically produced hydroxyl radicals. Partial removal of particulate aminocarb from the air may occur by dry deposition. Both vapor and particle phase aminocarb may be partly removed from the atmosphere by wet deposition.
Drinking Water Impact SURFACE WATER: The concn range of aminocarb in a still lake water (directly exposed) one hr. after spraying at a rate 52 g a.i./ha was less than 0.01 to 331 ug/l. The concn of aminocarb in an exposed stream one hr. following spraying was less than 0.01 to 18.4 ug/l . The median concn in both waters hardly exceeded 1 ug/l one hr. after spraying . The level will decrease rapidly in water with time . Metabolites of aminocarb have never been detected in natural water after aerial spraying . Aminocarb applied to the surface of a stream dispersed throughout the water column within 100 m of the place of application. Concn in the water were first highest near the surface, later more or less evenly distributed, and lingered longest near and within the stream bottom. Both oil and water based formulations of Matacil 1.8F gave similar results. Aminocarb concn diminished logarithmically downstream. Concn of aminocarb in suspended particles, sediments, periphyton, higher plants, insects, and brook trout were not higher than ambient in water and dissipated quickly. Aminocarb phenol was found consistently in measurable concn in water treated with the aq formulation, but in much smaller concn in water treated with the oil formulation. It was also found only as very small amt in 3 sediment samples in the stretch treated with the aq formulation. A slight increase in drift of Chironomidae was probably caused by aminocarb. No effects on survival, drift, or species composition of phytoplankton were noted.

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