- Sumethrin (d-phenothrin) is a type I pyrethroid insecticide. Pyrethroids are synthetic esters derived from naturally occurring pyrethrins extracted from chrysanthemum flowers.
- Like most synthetic pyrethroid, phenothrin exists as a mixture of stereoisomers i.e. molecules that have the same atoms linked in the same order, but differ in spatial arrangement
- The technical material known as phenothrin is an isomeric mixture of four isomers (1R- cis, 1R- trans, 1S- cis, 1S- trans). The specific isomer, d-phenothrin is a refined mixture that contains ≥95% of the 1R isomers, specifically a 1:4 ratio of . . .
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