Introduction: Chlorfenapyr is a pesticide, and specifically a pro-insecticide
(meaning it is metabolized into an active insecticide after
entering the host), derived from a class of microbially produced
compounds known as halogenated pyrroles.
Common name: Chlorfenapyr
Another name: Alert; Pylon; Citrex; PIRATE; STALKER; Sunfire;
Kotersu; Kotetsu; Stealth; Intrepid
Chemical Name: 4－Bromo-2-(p-chloropenyl)-1-(ethoxymethyl-5-
Empirical formula: C15H11BrClF3N2O
Mol. Weight: 437.2
CAS No.: 122453-73-0
Leading Chlorfenapyr supplier
97% Chlorfenapyr TC,
24% Chlorfenapyr EC,
10% Chlorfenapyr EC
Customerized Packing label
Packing: Required by customer
Chlorfenapyr FAO standard
Eye: Will cause irritation.
Skin :Moderately toxic. Will irritate the skin.
Inhaled :Little inhalation hazard if handled in the correct manner.
Product by glc. Residues by hplc. Details from BASF.
Oral Acute oral LD50 for male rats 441, female rats 1152 mg
tech./kg. Skin and eye Acute percutaneous LD50 for rabbits >2000
mg/kg. Moderate eye irritant; non-irritating to skin (rabbits).
Inhalation LC50 for rats 1.9 mg tech./l air. Other Non-mutagenic in
the Ames, CHO/HGPRT, mouse micronucleus and unscheduled DNA
synthesis tests. Toxicity class WHO (a.i.) II; EPA (formulation)
III (240 g/l 'Pylon', 'Phantom')
Birds Acute oral LD50 for mallard ducks 10, bobwhite quail 34
mg/kg. LC50 (8 d) for mallard ducks 9.4, bobwhite quail 132 ppm.
Fish LC50 (48 h) for carp 500 mg/l. LC50 (96 h) for rainbow trout
7.44, bluegill sunfish 11.6 mg/l. Daphnia LC50 (96 h) 6.11 mg/l.
Algae EC50 for Selenastrum capricornutum 132 ppb. Bees LD50 0.2
mg/bee. Worms NOEC (14 d) for Eisenia foetida 8.4 mg/kg.
Animals In rats, >60% of orally administered chlorfenapyr was
excreted primarily through faeces within 24 hours. The absorbed
residues were metabolised via N-dealkylation, dehalogenation,
hydroxylation and conjugation. Parent and less polar metabolites
were found in egg, milk and tissues such as fat and liver.
Metabolism in hens and goats is similar to that in rats, however in
these species, 80% of orally administered chlorfenapyr was rapidly
excreted. Un-excreted residues were present in kidney and liver. At
the potential maximum dietary burden, all residues are <0.01
ppm. Chlorfenapyr is the only significant residue component. Plants
In cotton, citrus, tomato, lettuce and potato, chlorfenapyr is
dealkylkated to the insecticidally active component (AC 303268) or
debrominated to less toxic metabolites. Chlorfenapyr does not
translocate out of treated plant parts. Parent compound is the
prominent residue. Soil/Environment In soil, chlorfenapyr is the
major residue. Debromination to a less toxic metabolite is the
primary route; dealkylation is not a primary route of degradation
in soil. Koc >10 000 ml/g, indicating chlorfenapyr is likely to
be strongly bound in soils. In water DT50 (direct photodegradation)
4.8-7.5 d; stable to hydrolysis at pH 4, 7 and 9.
Usage: Control of many species of insects and mites, including those
resistant to carbamate, organophosphate and pyrethroid insecticides
and also chitin-synthesis inhibitors, in cotton, vegetables, c