The claimed LOQ were 1 m g/l for milk and 10 m g/kg for tissues. The bound residues in the liver were treated with HCl and this liberated > 90 % of the radiolabel to yield metabolites similar to those in the free fraction (Croucher et al., 1985). Table 6. Evidence of lack of interconversion of the cis isomeric forms to the trans forms during metabolism in the target species; and. Thus, the highest level of residues observed in this study was about 30 m g/kg body fat. Thus by analogy it was probable that bound residues of alphacypermethrin were quantitatively similar. It has a low aqueous solubility, in relatively volatile and, based on its chemical properties, is not expected to leach to groundwater. The limit of detection is 10 m g/kg although no validation data other than for recoveries were provided (SAMS 461-1). Alpha-cypermethrin and zeta-cypermethrin are enriched isomers of the pyrethroid insecticide cypermethrin. It is widely used in agricultural crops, forestry as well as in public and animal health. A further 23% of the total administered radioactivity was excreted via urine, whereas secretion in milk accounted for < 1 %. The WHO Recommended Classification of Pesticides by Hazard identifies alpha-cypermethrin (technical grade) as Class II: moderately hazardous; Main Use: insecticide. The liver extract contained at least eight metabolites with a broad range of polarities, one component (16 % of the residues) had similar chromatographic properties to alphacypermethrin. Metabolism and elimination of 14C-aryl-labelled cis and trans isomers in rats. Cypermethrin Pesticide Fact Sheet. Samples of milk were treated with potassium oxalate solution and ethanol and extracted with diethyl ether and hexane. . Washington, D.C. 7. In the milk samples following the pour-on application, total radioactivity mean levels rose to 7 m g/l by day 2 with the range < 1-12 m g/l for the individual animals. Cantalamessa, F. (1993). The residues in liver and kidney contained a range of components. Once receive your question, the supplier will answer you as soon as possible. A minor component (3 % of the profile) had identical chromatographic properties (HPLC) to 14C-3PBA (3-phenoxybenzoic acid). Only in the subcutaneous fat of one cow slaughtered at 35 days post dosing was a residue measured at the LOQ of 30 m g/kg. Extracts were further cleaned up by liquid-solid chromatography on a Florisil cartridge before analysis with GC-ECD. $27.50 As low as: $19.50 . Residues were measured at 7, 14, 28 and 35 days after dosing. WL 85871 (ACYP, FASTAC). Table 5. HRC report SLL 279/931913. Starting at: $52.25 ... PT Fendona Pressurized Insecticide. Residues of Alphacypermethrin (m g/kg) in eggs and yolks after application of a spray of Alphacypermethrin. A normal hexane/acetonitrile partition was used for all liver and kidney extracts. Two tentative values of 16 % in liver and 20% in kidney were determined as alphacypermethrin as a percentage of total residues in one cow treated orally. Renal and subcutaneous fat samples from cows sacrificed at 7 and 14 days after treatment were also analysed for alphacypermethrin by GC with a LOQ of 10 m g/kg but only trace amounts were found. The maximum value was 5 m g/l on the 2nd and 4th day after treating with the highest dose. Cameron, D.A., Redgrave, V.A., MacDonald, I.A. Set Descending Direction. MOA: Sodium channel modulators, Pyrethroids, Pyrethrins, DDT Group: PYR CAS #: 67375308 Shaugnessy Code: 209600 Cypermethrin is a pyrethroid insecticide that mainly affects an insect’s central nervous system, used against a number of insect pests such as aphids, weevils, caterpillars, yellow cereal fly, flea beetles, blossom beetles, pod midge and moth pests on wheat, barley, oats, rye, triticale, peas and beans, brassicas, oilseed rape, sugar beets, fodder beet and mangels, potatoes, apples and pears. In two of the studies there was evidence of persistence of residues in both subcutaneous fat and perirenal fat of calves.