Flucycloxuron

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Chemical Identification | General Product Information | Physical & Safety Data

Chemical Identification

Common Name

Flucycloxuron

中文通用名

氟环脲

IUPAC

1-{α-[(EZ)-4-chloro-α-cyclopropylbenzylideneaminooxy]-p-tolyl}-3-(2,6-difluorobenzoyl)urea (ratio 50–80% (E)- and 50–20% (Z)- isomers)

CAS

N-[[[4-[[[[(4-chlorophenyl)cyclopropylmethylene]amino]oxy]methyl]phenyl]amino]carbonyl]-2,6-difluorobenzamide

CAS No.

113036-88-7,94050-52-9

Molecular Formula

C₂₅H₂₀ClF₂N₃O₃

Molecular Structure

General Product Information

Category

Insecticides > Insect growth regulators
Acaricides / Miticides > Mite growth regulators

Activity

Acaricide/Miticide
Flucycloxuron is active against eggs and larvae of Coleoptera, Diptera and Lepidoptera, and eggs and nymphs of spider mites. It is primarily a stomach poison but also has some contact activity. Spring applications are recommended, when 75-90% of eggs have hatched. Good residual activity is achieved due to penetration of the leaf cuticle by the compound.

Field trials on apples have shown no phytotoxicity on any of the varieties tested and no russeting on the variety Golden Delicious, even at high doses.

CropUse

CropUses:
rice, soybeans, fruits, vegetables, cotton, ornamentals

Apples	12.5 g ai/hl
Orchard/glasshouse	10-15 g ai/hl
Ornamentals	20 ml ai/hl
Vines	125-150 g ai/ha
Other crops	35-50 g ai/ha

Physical & Safety Data

Physical Properties

Off-white to yellow crystalline solid. Melting point 143.6°C. Apolar solvents poor, polar solvents poor to good.

Toxicology

Oral:Acute oral LD₅₀ for rats >5000 mg/ kg. Percutaneous:Acute percutaneous LD₅₀ for rats >2000 mg/kg. Non-irritating to skin; mild eye irritant (rabbits). Inhalation: LC₅₀ (4 h) for rats >3.3 mg/l air.

Environmental Profile

Ecotoxicology:
Algae: NOEC for Selenastrum capricornutum >2.2 μg/l.Bees:Low toxicity to bees. Contact LD₅₀ for honeybees >100 <μg/bee.Birds:Acute oral LD₅₀ for mallard ducks >2000 mg/kg. Dietary LC₅₀ (8 d) for mallard ducks and bobwhite quail >6000 mg/ kg diet.Daphnia: LC₅₀ (48 h) 0.27 μg/l.Fish: LC₅₀ (96 h) for rainbow trout and bluegill sunfish >100 mg/l.Worms: EC₅₀ (14 d) for earthworms >1000 mg/ kg soil.Other aquatic spp.: LC₅₀ (96 h) for mysid shrimp (Mysidopsis bahia) 340 ng/l.Other beneficial spp.:Slightly to moderately harmful to predatory mites ( IOBC).

Environmental fate:
Animals:Poorly absorbed from gastrointestinal tract; mainly excreted as unchanged parent compound in the faeces. Flucycloxuron absorbed is metabolised and further excreted in the urine, mainly as 2,6-difluorobenzoic acid and N-(4-carboxyphenyl)-N50 0.25-0.5 y.Plant:Non-systemic. Not metabolised on plants.

Transport Information

Signal Word:CAUTION; Hazard Class:III(Slightly hazardous)