Carfentrazone-ethyl

Synonyms

Aim; Aurora; Aurora (pesticide); Aurora 50WG; F 8426; F8426; Kuaimieling; Spotlight; Spotlight 24EC; Benzenepropanoic acid, .alpha.,2-dichloro-5-(4-(difluoromethyl)-4,5-dihydro-3-methyl-5-oxo-1H-1,2,4-triazol-1-yl)-4-fluoro-, ethyl ester; Ethyl 2-chloro-3-(2-chloro-4-fluoro-5-(4-(difluoromethyl)-4,5-dihydro-3-methyl-5-oxo-1H-1,2,4-triazol-1-yl)phenyl)propanoate; [ChemIDplus] Quicksilver; [ACGIH]

Category

Herbicides, Protox-Inhibiting

Description

Yellow liquid; [Merck Index] Yellow-orange liquid with a mild odor of petroleum; [HSDB] Viscous yellow-orange liquid; [ACGIH]

Sources/Uses

Used as post-emergence herbicide for control of broadleaf weeds, winter annuals, and mustards in cereals, corn, cotton, and rice; Also used as cotton defoliant; [HSDB] Also used on turf and ornamentals; [ACGIH]

Comments

“The lowest NOAEL of 3 mg/kg was found in female rats from a 2-year chronic study and this number is used as the basis for the recommended limit. Higher doses produce both liver damage and increased urinary porphyrin excretion.” No human data available; [ACGIH] The protox inhibitor herbicides (Fomesafen, Oxadiazon, Lactofen, Sulfentrazone, Carfentrazone-ethyl, Oxyfluorofen and Bifenox) can disrupt porphyrin metabolism; "It has been speculated that a transient form of porphyria variegate may occur following a massive exposure or long-term exposure to lower doses." [HSDB] May cause irritation; [MSDSonline] See "Fluthiacet-methyl."

Reference Link #1

Biomedical References

1 mg/m3, inhalable particulate matter

1.2E-07 mm Hg

LC50 (rat) >5,090 mg/m3;

Hepatoxic (a) from occupational exposure (secondary effect) or (b) in animal studies or in humans after ingestion

Not Classifiable

Processes

Industrial Processes with risk of exposure:

• Farming (Pesticides)