Aminopyralid

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Chemical Identification | General Product Information | Physical & Safety Data

Chemical Identification

Common Name

Aminopyralid

中文通用名

氯氨吡啶酸

IUPAC

4-amino-3,6-dichloropyridine-2-carboxylic acid
or
4-amino-3,6-dichloropicolinic acid

CAS

4-amino-3,6-dichloro-2-pyridinecarboxylic acid

CAS No.

150114-71-9

Molecular Formula

C₆H₄Cl₂N₂O₂

Molecular Structure

General Product Information

Category

Herbicides > Aromatic acid herbicides
Herbicides > Pyridine herbicides

Activity

Herbicide.
Aminopyralid is a systemic (phloem and xylem mobile) auxin mimic with foliar and soil residual activity. It is selective to a range of arable crop, grass and perennial species. In cereals it may be applied between the 3-leaf stage and the start of stem extension (jointing).
In temperate climates, the persistence of aminopyralid in soil may mean damage to several broadleaved crops if treated fields are rotated to these crops in the same year of application. These crops include cotton, soybeans, alfalfa, peas, lentils and other legumes.
Field trials on several rangeland and pasture sites in the USA showed that aminopyralid at 53 g/ha gave excellent control of species of biennial thistle, with good selectivity to grasses. Control was achieved whether aminopyralid as applied to thistles at the rosette stage or after bolting (reported at NCWS conference, 2005).

CropUse

Crop uses:
wheat, oilseed rape, pasture, palms, plantation crops, rangeland, rice, maize, sorghum, non crop areas.
Rangeland: 140-480 g/ha
Wheat: 4-10 gae/ha

Premix

Metsulfuron-methyl+aminopyralid
Aminopyralid+Triclopyr-butotyl
Premix Parters: folpet; mancozeb.

Physical & Safety Data

Physical Properties

Off-white powder. Molecular weight: 207.0 g/mol;Density 1.72 (20℃, relative to water at 4℃);Melting point:161.75-165.23℃.

Toxicology

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Environmental Profile

WATER SOLUBILITY: 205 g/l (pH 7)

Study	Species Value
Avian Oral	Bobwhite quail LD₅₀ >2250 mg ae/kg bw
Avian dietary	Bobwhite quail LD₅₀ >5620 mg ae/kg diet
Avian dietary	Mallard duck LD₅₀ >5620 mg ae/kg diet
Acute toxicity	Rainbow trout [96 h] LC₅₀ >100 mg ae/L
Acute toxicity	Bluegill sunfish [96 h] LC₅₀ >100 mg ae/L
Acute toxicity	Sheepshead minnow [96 h] LC₅₀ >120 mg ae/L
Acute toxicity	Daphnia [48 h] EC₅₀ >100 mg ae/L
Acute toxicity	Mysid shrimp[96 h] LC₅₀ >100 mg ae/L
Acute toxicity	Eastern oyster[48 h] Slightly toxic
Acute toxicity	EC₅₀ >89 mg ae/L
Growth and reproduction	Daphnia [48 h] NOEC = 100 mg ae/L
Chronic toxicity	Midge NOEC = 130 mg ae/L
Acute contact	Honeybee [48 h] LD₅₀ >100 mg ae/bee
Acute oral	Honeybee [48 h] LD₅₀ >120 mg ae/bee
Acute toxicity	Earthworm [14 d] LC₅₀ >100 mg ae/kg soil
Acute toxicity	Freshwater green algae[72 h] Slightly toxic E_rC₅₀ >30 mg ae/L
Acute toxicity	Freshwater blue-green algae[120 h] EC₅₀ >27 mg ae/L
Acute toxicity	Saltwater diatom[72 h] E_bC₅₀ >77 mg ae/L
Acute toxicity	Freshwater diatom [96 h] EC₅₀ >14 mg ae/L
Acute toxicity	Lemna[14 d] EC₅₀ >88 mg ae/L

Fate in soil:
Aminopyralid had a mean half-life of 34.5 days over eight sites in N. America and 25 days for four sites in Europe. Laboratory studies indicated some soil mobility with a Koc of 10.8 L/kg, but movement was limited in field studies. No significant metabolites have been noted.

Fate in water:
The main route of degradation in water is by photolysis. This happens rapidly in surface water (half life 0.6 days). Rapid photolysis and limited soil movement mean that the potential for groundwater contamination is low.

Fate in air:
Potential for volatisation is extremely low.

Transport Information

Hazard Class:O (Obsolete as pesticide, not classified)