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Bioallethrin structure.svg
IUPAC name
(RS)-3-allyl-2-methyl-4-oxocyclopent-2-enyl (1R,3R)-2,2-dimethyl -3-(2-methylprop-1-enyl)cyclopropanecarboxylate
3D model (JSmol)
Molar mass 302.40794
P03AC02 (WHO) QP53AC02 (WHO)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Bioallethrin is a brand name for an ectoparasiticide. It consists of two of the eight stereoisomers of allethrin I in an approximate ratio of 1:1.[1][2] The name Bioallethrin is a registered trademark of Sumitomo Chemical Co., Ltd.[3]

Esbiothrin (CAS number 260359-57-5 ) is a mixture of the same two stereoisomers, but in an approximate ratio of R:S = 1:3.[2]

Esbioallethrin or S-bioallethrin (CAS number 28434-00-6 ) is the pure S-form (that is, the wedge in the structure as shown in the box points down).[4]

The name bioallethrin is a common name approved by the British Standards Institution and published in [5]. It is also included in [6] and earlier editions. It should not have been accepted as a trademark in the USA, Japan or anywhere else. It should not be written with an initial capital, except at the start of a sentence.


  1. ^ "Bioallethrin data sheet". Compendium of Pesticide Common Names. Alan Wood. Retrieved 2010-06-29. 
  2. ^ a b "Esbiothrin" (PDF). WHO specifications and evaluations for public health pesticides. WHO: 11f. 
  3. ^ Trademark Status and Document Retrieval: Bioallethrin
  4. ^ ChemIdplus: S-Bioallethrin
  5. ^ Recommended Common Names for Pesticides (BS 1831:1969)
  6. ^ British Approved Names 2017