Produit Nom:Rich-d-transallethrin 93%TC

CAS No.: 28434-00-6

Description: 

Rich-d-transallethrin

Insecticide

pyrethroid

NOMENCLATURE

Common name esdepalléthrine (France (AFNOR))

IUPAC name (S)-3-allyl-2-methyl-4-oxocyclopent-2-enyl (1R,3R)-2,2-dimethyl-3-(2-methylprop-1-enyl)cyclopropanecarboxylate

Chemical Abstracts name [1R-[1a(S*),3b]]-2-methyl-4-oxo-3-(2-propenyl)-2-cyclopenten-1-yl 2,2-dimethyl-3-(2-methyl-1-propenyl)cyclopropanecarboxylate   

CAS RN [28434-00-6] 

PHYSICAL CHEMISTRY

Composition Esbiol (OMS 3046) contains ³95% m/m total isomers, of which ³90% is esdepalléthrine. Esbiothrin (OMS 3045) contains ³93% m/m total isomers, of which ³72% is esdepalléthrine, the remainder being essentially the (R)-cyclopentenyl isomer, with <3% cis- isomers. 

Mol. wt. 302.4 

M.f. C19H26O3 

Form Orange-yellow viscous liquid. 

M.p. Not applicable; no crystallisation observed at -40 ºC 

B.p. 165-170 ºC/0.15 mmHg (OMS 3046); 163-170 ºC/0.15 mmHg (OMS 3045) 

V.p. 44 mPa (25 ºC) 

S.g./density 1.010 at 20 ºC 

Solubility Completely miscible with 100% ethanol, acetone, dichloromethane, di-isopropyl ether, toluene, n-hexane, chloroform, ethyl acetate, methanol, n-octanol, and petroleum solvent (20 ºC ). 

Stability Degraded by u.v. light. 

Specific rotation OMS 3046: [a]D20 -47.5?to -55?(50 g/l toluene); OMS 3045: [a]D20 ³-37?(50 g/l toluene) 

F.p. 113 ºC (open cup) 

APPLICATIONS

Mode of action Non-residual insecticide with rapid knockdown action. 

Uses Esdepalléthrine is by far the most potent constituent of allethrin. OMS 3046 is used in aerosols, coils, electric vapourisers, or sprays indoors against flying and crawling insects (Blattodea, Culicidae, Muscidae). Also used in aerosols and sprays in mixtures with other pyrethroids and piperonyl butoxide. OMS 3045 has similar uses to OMS 3046. 

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