Synonyms: α-Cypermethrin; alpha cypermethrin; 2,2-dimethyl-3-(2,2-dichlorovinyl)cyclopropanecarboxylate-α-cyano-(3-phenoxy)-benzylester; Alphamethrin; alphametrin; Bestox; cyano-3-phenoxybenzyl 3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropane carboxylate; Cyano-3-phenoxybenzyl 3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylate, (+-)-cis isomer; cyano(3-phenoxyphenyl)methyl 3-(2,2-dichloroethenyl)-2,2-dimethylcyclopropanecarboxylate, (1A(S*), 3A)-(+-)-; Cyano(3-phenoxyphenyl)methyl 3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylate, (+-)-cis isomer; Cyclopropanecarboxylic acid, 3-(2,2-dichloroethenyl)-2,2-dimethyl-, cyano(3-phenoxyphenyl)methyl ester, (1alpha(s*),3alpha)-(+/-)-; Cyclopropanecarboxylic acid, 3-(2,2-dichloroethenyl)-2,2-dimethyl-, cyano(3-phenoxyphenyl)methyl ester, (S)-; Fastac; WL 85871;