DIFLUBENZURON

GENERAL
DIFLUBENZURON is a benzoylurea insecticide which is effective against a wide range of leaf-eating insects in forestry, woody ornamentals anf fruit. Controls certain major pests in cotton, soyabeans, citrus, tea, vegetables and mushrooms. Also controls larvae of flies, mosquitoes, grasshoppers and migratory locusts. Used as an ectoparasiticide on sheep for control of lice, fleas and blowfly larvae. 

STRUCTURE

CAS NO.

DIFLUBENZURON

35367-38-5

ACTIVITY

Insecticides
(Chitin Synthesis Inhibitors)

MOL WT.

C14H9ClF2N2O2
310.68
SYNONYMS
1-(4-chlorophenyl)-3-(2,6-difluorobenzoyl)urea
N-[[(4-chlorophenyl)amino]carbonyl]-2,6-difluorobenzamide

TOXICITY

Mammals

Acute oral LD50 for rats and mice >4640 mg/kg.
Acute dermal LD50for rabbits >10000mg/kg.
Non-irritating to skin, slightly to eye.
No teratoginic, mutagenic or oncogenic.
NOEL(2 y) for rats 40 mg/kg diet, ADI 0.02 mg/kg body weight.

Birds

LC50 for bobwhite quail and mallard ducks >4640mg/kg

Fish

LC50(96h) for rainbow trout 140mg/งค,
              for bluegill sunfish 135mg/งค

Bee

Not dangerous to bees and predatory insects.
LD50(oral and contact) >100 งถ/be

PRECAUTION IN HANDLING

It controls most leaf-feeding insects in forestry, codling moth, leafminers and other leaf-eating insects in top fruit, citrus rust mite in citrus, armyworms in maize, cotton boll weevil, armyworms, leafworms in cotton, soybean looper complex in soyabeans. Also controls larvae of mushroom files in mushroom casing, mosquito larvae, fly larvae in animal housing, locusts and grasshoppers

SPECIFICATION

Appearance

White crystalline solid

Speciic Gravity

1.56g/cm3 at 20กษ

Vapor Pressure

9.0×10-10mmHg at 25กษ

Melting Point

210~230กษ(decomp.)

Corrosiveness

Non corrosive to metals

Solubility(20กษ)

0.08mg/งค water, 6.5g/งค acetone(20กษ)
104 g/งค dimethylformamide, 20 g/งค dioxane(25กษ)
Moderately soluble in polar organic solvents, very slightly
soluble in non-polar organic solvents

Partition Coefficient

Kow logP = 3.89 at 22กษ

Stability

Light sensitive when in solution, but stable to sunlight as
a solid.
<0.5% decomp. after 1 day(100กษ), 7 days(50กษ).
Stable at pH 5 and 7(DT50>150 d), at pH 9(DT50=42 d)
in aqueous solution

Purity

90% min

COMMENTS