Laserfiche WebLink
'1*0XNI:1' PIP - CARBARY1. <br />Environmental Fate: <br />litipaiace.orst.edu/cgi-binimts 01,pipsicarbarn l.htm <br />Breakdown in soil and groundwater: Carbaryl has a low persistence in soil. Degradation of <br />carbaryl in the soil is mostly due to sunlight and bacterial action. It is bound by organic matter and <br />can be transported in soil runoff. Carbaryl has a half-life of 7 to 14 days in sandy loam soil and 14 <br />to 28 days in clay loam soil. Carbaryl has been detected in groundwater in three separate cases in <br />California [14]. <br />Breakdown in water: In surface water, carbaryl is broken down by bacteria and through <br />hydrolysis. Evaporation is very slow. Carbaryl has a half-life of about 10 days at neutral pH. The <br />half-life varies greatly with water acidity [14]. <br />Breakdown in vegetation: Degradation of carbaryl in crops occurs by hydrolysis inside the plants. <br />It has a short residual life of less than 2 weeks. The metabolites of carbaryl have lower toxicity to <br />humans than carbaryl itself. The breakdown of this substance is strongly dependent on acidity and <br />temperature [8]. <br />Physical Properties: <br />• Appearance: Carbaryl is a solid that varies from colorless to white or gray, depending on the purity <br />of the compound. The crystals are odorless. Carbaryl is stable to heat, light, and acids. It is not <br />stable under alkaline conditions. It is noncorrosive to metals, packaging materials, and application <br />equipment. <br />• Chemical Name: 1-napthyl methylcarbamate [10] <br />• CAS Number: 63-25-2 <br />• Molecular Weight: 201.23 <br />• Water Solubility: 40 mg/L @ 30 C [10] <br />• Solubility in Other Solvents: dimethy I formaldehyde v.s; acetone s.; dimethyl sulfoxide v.s.; <br />cyclohexanone s. [10] <br />• Melting Point: 142 C [ 10] <br />• Vapor Pressure: <5.3 mPa @ 25 C [10] <br />• Partition Coefficient: Not Available <br />• Adsorption Coefficient: 300 [10] <br />Exposure Guidelines: <br />• ADI: 0.01 mg/kg/day [ 10] <br />• MCL: Not Available <br />• RfD: 0.1 mg/kg/day [20] <br />• PEL: 5 mg/m3 (8 -hour) [31 ] <br />• HA: 0.7 mg/L (lifetime) [24] <br />• TLV: Not Available <br />Basic Manufacturer: <br />Rhone-Poulec Ag. Co. <br />P.O. Box 12014 <br />2 T.W. Alexander Dr. <br />Research Triangle Park, NC 27709 <br />44 4� 1''00 I:i4 PN <br />