RT Report
T1 Environmental Health Criteria 98 - Tetramethrin
A1 World Health Organization, 
K1 environmental health
K1 chemical
K1 aquatic ecology
K1 terrestrial ecosystem
SN 92 4 154298 5
YR 1990
FD 1990
LK https://wedocs.unep.org/handle/20.500.11822/29410
UL https://wedocs.unep.org/handle/20.500.11822/29410
NO Tetramethrin  was first synthesized in  1964 and first marketed in 1965. Chemically, it is an ester  of  chrysan-themic  acid (2,2-imethyl-3-(2,2-dimethylvinyl)-cyclopro-panecarboxylic  acid)  with 3,4,5,6 tetrahydrophthalimido-methyl  alcohol.  It is  a mixture of  four stereoisomers:[1R,trans], [1R,cis], [1S,trans], and [1S,cis]. In techni-cal  products,  the composition  ratio  of the  isomers is roughly  4:1:4:1. Among the isomers, the [1R,trans] isomer is the most active biologically followed by  the  [1R,cis] isomer. A mixture of the [1R,cis] and [1R,trans] isomers (1:4)  is commercialized under  the  trade name  of `Neo-Pynamin Forte' (designated as 1R, cis/trans-tetramethrin in this monograph).
DS UN Environment Document Repository
RD Sep 19, 2026