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Fluroxypyr

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(CAS#: 69377-81-7)

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Chemical Name: 4-amino-dichloro-6-fluoro-pyridyl-2-oxyacetic acid

Physical Properties:

Molecular Formula: C7H5O3N2FCl2

Molecular Weight: 255

Structure:

Physical and Chemical Properties

Description:pure is a white crystalline solid;technical is a white crystalline solid with the smell of soap.
Melting point:Pure 232-233ˇăC,technical(1-methylheptylester)56-57ˇăC
Boiling point:Not available.
Vapor pressure:Pure 9.42*10-7 mmHg at 25ˇăC,technical 1.05*10-4 mmHg at 25ˇăC.
Stability:Two years at room tempterature.
Water 91 mg/ml at 20ˇăC Water 0.9mg/ml at 27.7ˇăC
Organic solvents g/L Organic solvents(%)
Acetone 41.6 acetone over 4
Chloroform and dichloromethane over 50
Distribution coefficient in n-octyl alcohol and water:Pure 55:1,technical 6140:1.

Acute toxicity:

Oral LD50 rat 2405mg/kg;Dermal LD50 rabbit;4-h Inhal.LC50 rat over 296mg/m3.

Application:

This herbicide is effective to control the broadleaf weed for wheat,barley,Corn,grape,orchard,pasture,wood and lawn etc.,such as Ggallium aparine L.var.tenerum,Polygonum convolvulus L.,Portulaca oleracea L.,Solanum nigrum L.,Stellaria media(L.)Cyr.,Convolvulus arvensis L.,Polygonum barbatum L.,Amaranthus albus L.,It's invalid to control the weed of the grass family.

Fluroxypyr is registered for use on wheat, barley, oats,fallow cropland, and on-farm non-cropland.

Application Rates:

Application rates 2/3 to 1 1/3 pints of formulated product (0.125 to 0.25 pounds active ingredient acid equivalent) per acre. One application is allowed per season.

Summary Science Statements:

Based upon a battery of acute toxicity studies, Starane EC Herbicide is classified as Toxicity Category II. Fluroxypyr is classified as a "not likely" human carcinogen. It does not demonstrate developmental or reproductive toxicity. The data available at this time indicate that fluroxypyr is highly phytotoxic. Available data indicate that fluroxypyr acid is mobile to very mobile in the submitted laboratory studies. However, dissipation by hydrolysis and microbial degradation reduced persistence and limited downward transport (i.e., leaching) in the submitted field studies.

Technical material and formulation:

95% technical grade and 20% emulsifiable concentrate(E.C).

PROPERTY TECHNICAL END-USE
Physical State Solid Liquid
Color Gray olive Tan
Odor Musty, slightly chlorine Kerosene
Melting Point 57.5 DEG C N/A
Density 1.3 g/mL @ 21DEG C 0.989 g/mL @ 20 DEG C
Solubility (Water) 136 g/L @ pH 7 N/A
Vapor Pressure 2.0 x 10-5 kPa @ 25 DEG C N/A
Octanol/Water Partition Coefficient
Log10 Kow = 5.04 @ pH 7 N/A
pH 6.81 3.94
Toxicology Characteristics:

Acute Toxicity (Starane F Technical):

Acute Oral Toxicity in Rats: - LD50 > 5000 mg/kg in males and females; Toxicity Category IV

Acute Dermal Toxicity in Rats: - LD50 > 2000 mg/kg in males and females; Toxicity Category III

Acute Inhalation Toxicity in Rats: - LC50 > 2 mg/L in males and females; Toxicity Category IV

Primary Eye Irritation in Rabbits: - Mild irritation (slight conjunctival irritation) resolved within 24 hours in 2 rabbits and within 48 hours in 1 rabbit; Toxicity Category III

Primary Dermal Irritation in Rabbits - Non-irritating; Toxicity Category IV

Primary Dermal Sensitization in Guinea-Pigs - Did not exhibit any sensitization potential.