resmethrin resmethrin resmethrin is a pyrethroid insecticide with many uses, including control of the adult mosquito population. resmethrin names iupac names (5-benzylfuran-3-yl)methyl (2r)-2,2-dimethyl-3-(2-methylprop-1-en-1-yl)cyclopropane-1-carboxylate; 5-benzyl-3-[({[(3r)-2,2-dimethyl-3-(2-methylprop-1-en-1-yl) cyclopropyl]carbonyl}oxy)methyl]furan; (5-benzyl-3-furyl)methyl-2,2-dimethyl-3-(2-methyl-1-propen-1-yl)cyclopropancarboxylate; 5-benzyl-3-furylmethyl (1rs,3rs;1rs,3sr)-2,2-dimethyl-3-(2-methylprop-1-enyl)cyclopropanecarboxylate; 5-benzyl-3-furylmethyl(1rs)-cis-trans-2,2-dimethyl-3-(2-methylprop-1-enyl)cyclopropanecarboxylate; 5-benzyl-3-furylmethyl(±)-cis-trans-chrysanthemate other names methyl 2,2-dimethyl-3-(2-methyl-1-propen-1-yl)cyclopropanecarboxylate identifiers cas number 10453-86-8 y28434-01-7 (bioresmethrin) y 3d model (jsmol) interactive image chebi chebi:8811 chembl chembl2106605 n chemspider 19952179 y echa infocard 100.030.842 ec number 233-940-7 kegg c10991 y pubchem cid 5053 rtecs number gz1310000 unii z6pn6ktg4k yypp8yqz13b (bioresmethrin) y un number 3082 3349 2902 comptox dashboard (epa) dtxsid7022253 inchi inchi=1s/c22h26o3/c1-15(2)10-19-20(22(19,3)4)21(23)25-14-17-12-18(24-13-17)11-16-8-6-5-7-9-16/h5-10,12-13,19-20h,11,14h2,1-4h3/t19-,20?/m1/s1 ykey: vemktzhhvjildy-fiwhbwsrsa-n yinchi=1/c22h26o3/c1-15(2)10-19-20(22(19,3)4)21(23)25-14-17-12-18(24-13-17)11-16-8-6-5-7-9-16/h5-10,12-13,19-20h,11,14h2,1-4h3/t19-,20?/m1/s1key: vemktzhhvjildy-fiwhbwsrbd smiles o=c(occ2cc(cc1ccccc1)oc2)c3(/c=c(\c)c)c3(c)c properties chemical formula c22h26o3 molar mass 338.44 g/mol hazards ghs labelling: pictograms signal word warning hazard statements h302, h410 precautionary statements p264, p270, p273, p301+p312, p330, p391, p501 except where otherwise noted, data are given for materials in their standard state (at 25 °c , 100 kpa). n verify (what is yn ?) infobox references the resmethrin molecule has four stereoisomers determined by cis-trans orientation around a carbon triangle and chirality. technical resmethrin is a mixture of (1r,trans)-, (1r,cis)-, (1s,trans)-, and (1s,cis)- isomers, typically in a ratio of 4:1:4:1. the 1r isomers (both trans and cis) show strong insecticidal activity, while the 1s isomers do not. the (1r,trans)- isomer is also known as bioresmethrin,(+)-trans-resmethrin, or d-trans-resmethrin; although bioresmethrin has been used alone as a pesticide active ingredient, it is not now registered as a separate active ingredient (ai) by the u.s. epa. the (1r,cis)- isomer is known as cismethrin, but this is also not registered in the u.s. for use alone as a pesticide ai. commercial trade names for products that contain resmethrin are: chrysron, crossfire, lethalaire v-26, pynosect, raid flying insect killer, scourge, spb-1382, sun-bugger #4, synthrin, syntox, vectrin, and whitmire pt-110.