Bioallethrin
Bioallethrin is an ectoparasiticide. It consists of two of the eight stereoisomers of allethrin in any ratio.
Esbiothrin is a mixture of the same two stereoisomers, but in an approximate ratio of R:''S = 1:3.
Esbioallethrin or S-bioallethrin is the pure S''-form.
The name bioallethrin was a common name approved by the British Standards Institution and published in. BS 1831 has been withdrawn, and the common name has been adopted by ISO. It is also included in and earlier editions.