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Permethrin
C21H20Cl2O3 391.29
 Cyclopropanecarboxylic acid, 3-(2,2-dichloroethenyl)-2,2-dimethyl-, (3-phenoxyphenyl)methyl ester;
 (±)-3-Phenoxybenzyl 3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylate [52645-53-1]

DEFINITION

Permethrin contains NLT 98.0% and NMT 102.0% of permethrin (C21H20Cl2O3) calculated on the anhydrous basis. It contains NLT 23.0% and NMT 27.0% of the cis isomers, and NLT 73.0% and NMT 77.0% of the trans isomers.

USP REFERENCE STANDARDS FOR PURCHASE

USP Permethrin RS
USP Permethrin Related Compound G RS
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