Specification :

Beta-Cyfluthrin

Common name: beta-cyfluthrin; beta-cyfluthrine; cyfluthrin-beta
IUPAC name: ( RS) -cyano-4-fluoro-3-phenoxybenzyl ( 1RS, 3RS; 1RS, 3SR) -3-( 2, 2-dichlorovinyl) -2, 2-dimethylcyclopropanecarboxylate
Chemical Abstracts name: cyano( 4-fluoro-3-phenoxyphenyl) methyl 3-( 2, 2-dichloroethenyl) -2, 2-dimethylcyclopropanecarboxylate
CAS RN: [ 68359-37-5]

PHYSICAL CHEMISTRY
Composition: Comprises a mixture of four diastereoisomeric pairs of enantiomers:
I ( R) -a-cyano-4-fluoro-3-phenoxybenzyl ( 1R) -cis-3-( 2, 2-dichlorovinyl) -2, 2-dimethylcyclopropanecarboxylate + ( S) -a, ( 1S) -cis-;
II ( S) - a, ( 1R) -cis- + ( R) - a, ( 1S) -cis-;
III ( R) - a, ( 1R) -trans- + ( S) - a, ( 1S) -trans-;
IV ( S) - a, ( 1R) -trans- + ( R) - a, ( 1S) -trans-.
Tech. grade contains: 5000 mg/ kg. No irritation to skin and slight primary irritation to the eye ( rabbits) .
Inhalation: LC50 ( 4 h) for rats c. 0.1 mg/ l ( aerosol) , 0.53 mg/ l ( dust) .
NOEL: ( 90 d) for rats 125, dogs 60 mg/ kg diet.
ADI: 0.02 mg/ kg b.w.
Toxicity class: WHO ( a.i.) Ib; EPA ( formulation) II
EC hazard T+ ; R26/ 28| N; R50, R53

ECOTOXICOLOGY
Birds: Acute oral LD50 for Japanese quail > 2000 mg/ kg.
Fish: LC50 ( 96 h) for golden orfe 330.9, rainbow trout 89, bluegill sunfish 28 ng/ l.
Daphnia: LC50 ( 48 h) 0.00029-0.0018 mg/ l.

ENVIRONMENTAL FATE
Animals: Beta-cyfluthrin was largely and very quickly eliminated; 98% was eliminated after 48 h via the urine and the faeces.
Plants: Since beta-cyfluthrin is not systemic, it penetrates only slightly into the plant tissues and is hardly translocated into other plant parts. The concentration is very low and can be neglected.
Soil/ Environment: Degradation in different soils is rapid. Leaching behaviour can be classified as immobile. The metabolites of beta-cyfluthrin are readily accessible to further microbial degradation to the point of mineralisation to CO2 in the soil.