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CAS #: 584-79-2
NOMENCLATURE Common name: bioallethrin; depalléthrine; d-trans-allethrin IUPAC name: (RS)-3-allyl-2-methyl-4-oxocyclopent-2-enyl (1R,3R)-2,2-dimethyl-3-(2-methylprop-1-enyl)cyclopropanecarboxylate Alt: (RS)-3-allyl-2-methyl-4-oxocyclopent-2-enyl (+)-trans-chrysanthemate Roth: (RS)-3-allyl-2-methyl-4-oxocyclopent-2-enyl (1R)-trans-2,2-dimethyl-3-(2-methylprop-1-enyl)cyclopropanecarboxylate Chemical Abstracts name: 2-methyl-4-oxo-3-(2-propenyl)-2-cyclopenten-1-yl 2,2-dimethyl-3-(2-methyl-1-propenyl)cyclopropanecarboxylate CAS RN: [584-79-2] (same as for allethrin) EEC no.: 209-542-4
PHYSICAL CHEMISTRY Composition: Bioallethrin contains 93% m/m total isomers, of which there is 90% trans- isomer pair and 3% cis- isomer pair. Material in 'D-Trans' is 90% m/m bioallethrin. For d-allethrin, see allethrin [(1R)- isomers].
Mol. wt.: 302.4;
Form: Bioallethrin is an orange-yellow viscous liquid. The material in 'D-Trans' is an amber viscous liquid.
M.p.: Not applicable; no crystallisation observed at -40C.
B.p.: Bioallethrin 165-170C/0.15 mmHg;
V.p.: 43.9 mPa (25C);
KOW: logP = 4.68 (25C);
Henry: 2.89 Pa m3 mol-1 (calc.)
S.g./density: 1.012 at 20C;
Solubility: Bioallethrin: in water 4.6 mg/l (25C). Completely miscible with acetone, ethanol, chloroform, ethyl acetate, hexane, toluene and dichloromethane (20C). Stability: Degraded by u.v. light. In aqueous solution, DT50 1410.7 d (pH 5), 547.3 d (pH 7), 4.3 d (pH 9). Specific rotation: [a]D20 -18.5 to -22.5 (50 g/l toluene); F.p.: 87C (Pensky-Martens
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