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Chemical Identification
Common Name
Fluroxypyr
中文通用名
氯氟吡氧乙酸
IUPAC
4-amino-3,5-dichloro-6-fluoro-2-pyridyloxyacetic acid
CAS
[(4-amino-3,5-dichloro-6-fluoro-2-pyridinyl)oxy]acetic acid
CAS No.
69377-81-7
Molecular Formula
C7H5Cl2FN2O3
Molecular Structure
Category
Activity
Herbicide
Premix
Tribenuron-methyl+fluroxypyr
Thifensulfuron-methyl+tribenuron-methyl+fluroxypyr
Fluroxypyr+florasulam
MCPA+fluroxypyr
Fluroxypyr+clodinafop-propargyl
Fluroxypyr+carfentrazone-ethyl
Fluroxypyr-meptyl+thifensulfuron-methyl+ethametsulfuron+tribenuron-methyl
Fluroxypyr+2,4-D ester
Florasulam+Fluroxypyr-meptyl
fenoxaprop+fluroxypyr+dicamba
florasulam+fluroxypyr+MCPA
Tribenuron Methyl+Carfentrazone-ethyl+Fluroxypyr-meptyl
Florasulam+MCPA-isooctyl+fluroxypyr-meptyl
Fluroxypyr+Nicosulfuron+Atrazine
pinoxaden+clodinafop+2,4-D ester+fluroxypyr
Penoxsulam+Fluroxypyr-meptyl
thiencarbazone+tribenuron+thifensulfuron+fluroxypyr+MCPA
clopyralid+fluroxypyr+pyroxsulam
metsulfuron-methyl + thifensulfuron-methyl + fluroxypyr 1-methylheptyl ester
fluroxypyr 1-methylheptyl ester
thifensulfuron-methyl + fluroxypyr 1-methylheptyl ester
Cyhalofop-butyl+Fluroxypyr-meptyl
Rimsulfuron+Mesotrione+Fluroxypyr-meptyl
Mesotrione+Atrazine+Fluroxypyr-meptyl
Nicosulfuron+Dicamba+Fluroxypyr
Penoxsulam+Cyhalofop-butyl+Fluroxypyr-meptyl
Nicosulfuron+Fluroxypyr-meptyl+Halosulfuron-methyl
Bromoxynil octanoate+Nicosulfuron+Fluroxypyr-meptyl
MCPA-sodium+Glyphosate ammonium+Fluroxypyr-meptyl
Clodinafop-propargyl+Carfentrazone-ethyl+Fluroxypyr-meptyl
Fluroxypyr-meptyl+Carfentrazone-ethyl+Florasulam
Cyhalofop-butyl+Clomazone+Fluroxypyr-meptyl
Bensulfuron-methyl+Fluroxypyr-meptyl
Halauxifen-methyl+Fluroxypyr-meptyl
Premix Parters: pyrazophos;
Physical Properties
Molecular weight:255.0; Physical form:White, crystalline solid. Density:1.09 (24 °C); Melting point:232-233 °C; Vapour pressure:3.784 ×10-6 mPa (20 °C, Knudsen effusion); Henry constant:1.06 × 10-8 Pa m3 mol-1 ( calc.); Partition coefficient(n-octanol and water):logP = -1.24 (unstated pH); pKa:2.94; Solubility:In water 91 mg/l (unspecified pH, 20 °C). In acetone 51.0, methanol 34.6, ethyl acetate 10.6, isopropanol 9.2, dichloromethane 0.1, toluene 0.8, xylene 0.3 (all in g/l, 20 °C).; Stability:Stable in acidic media. Fluroxypyr is acidic, and reacts with alkalis to form salts. DT50 in water 185 d ( pH 9, 20 °C). Stable at temperatures up to melting point. Stable in visible light.
Toxicology
Oral:Acute oral LD50 for rats 2405 mg/ kg. Percutaneous:Acute percutaneous LD50 for rabbits >5000 mg/kg. Mild eye irritant; non-irritating to skin (rabbits). Inhalation: LC50 (4 h) for rats >0.296 mg/l air. Phytotoxicity:Non-phytotoxic to the crops for which its use is recommended.
Environmental Profile
Ecotoxicology: 
Algae: EC50 (96 h) for green algae >100 mg/l.Bees:Not toxic to bees. LD50 (contact, 48 h) >25 μg/bee.Birds:Acute oral LD50 for mallard ducks and bobwhite quail >2000 mg/ kg.Daphnia: LC50 (48 h) >100 mg/l.Fish: LC50 (96 h) for rainbow trout and golden orfe >100 mg/l. 

Environmental fate: 
Animals:In rats, following oral administration, fluroxypyr is not metabolised, but is rapidly excreted unchanged, principally in the urine.Soil:In soil, fluroxypyr is rapidly degraded by micro-organisms in aerobic conditions to 4-amino-3,5-dichloro-6-fluoropyridin-2-ol, 4-amino-3,5-dichloro-6-fluoro-2-methoxypyridine, and CO2. DT50 in laboratory soil studies Plant:In plants, fluroxypyr is not metabolised, but biotransformation to conjugates occurs.
Transport Information
Signal Word:WARNING; Hazard Class:II(Moderately hazardous)

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