Triclopyr

Triclopyr Basic information
Product Name:Triclopyr
Synonyms:TIMTEC-BB SBB003109;TRIDENT;TRICLOPYR;(3,5,6-trichloro-2-pyridyloxy)-aceticaci;[(3,5,6-trichloropyridin-2-yl)oxy]ethanoicacid;3,5,6-trichloro-2-pyridinyloxyethanoicacid;Ace-brush;Acetic acid, ((3,5,6-trichloro-2-pyridyl)oxy)-
CAS:55335-06-3
MF:C7H4Cl3NO3
MW:256.47
EINECS:259-597-3
Product Categories:Agro-Products;Aromatics;Alpha sort;Herbicides;Pesticides&Metabolites;Heterocycles;HERBICIDE;PyridinePesticides&Metabolites;Q-ZAlphabetic;TP - TZ;PyridineAlphabetic
Mol File:55335-06-3.mol
Triclopyr Structure
Triclopyr Chemical Properties
Melting point 148-150°C
Boiling point 290°C
density 1.7626 (rough estimate)
refractive index 1.6200 (estimate)
storage temp. Sealed in dry,Room Temperature
solubility Chloroform (Slightly), Ethyl Acetate (Slightly), Methanol (Slightly)
pka2.68(at 25℃)
form Liquid
color Fluffy solid
Water Solubility 0.43g/L(temperature not stated)
Merck 13,9730
BRN 225301
CAS DataBase Reference55335-06-3(CAS DataBase Reference)
NIST Chemistry ReferenceAcetic acid, [(3,5,6-trichloro-2-pyridinyl)oxy]-(55335-06-3)
EPA Substance Registry SystemTriclopyr (55335-06-3)
Safety Information
Hazard Codes Xn
Risk Statements 22
Safety Statements 22-24/25
RIDADR UN3082 (liquid)
WGK Germany 3
RTECS AJ9000000
HS Code 2933.39.2500
Hazardous Substances Data55335-06-3(Hazardous Substances Data)
ToxicityLD50 orally in rats: 713 mg/kg (Kenaga)
MSDS Information
Triclopyr Usage And Synthesis
Chemical PropertiesWhite to Off-White Solid
UsesSelective postemergence herbicide to control many woody and broad-leaved weeds.
UsesTriclopyr is a selective post-emergence herbicide.
DefinitionChEBI: A monocarboxylic acid that is (pyridin-2-yloxy)acetic acid substituted by chloro groups at positions 3, 5 and 6. It is an agrochemical used as a herbicide.
Agricultural UsesHerbicide: Triclopry is a systemic herbicide used on rice, range land and pasture, rights-of-way, forestry and grasslands, including home lawns, for control of broadleaf weeds and woody plants. Triclopry is usually available as a triclopyr butoxyethyl ester (BEE) or as a triclopry triethylamine salt (TEA). Registered for use in the U.S. Some products may be classified as Restricted Use Pesticides (RUP). Registered for use in EU countries . U.S. Maximum Allowable Residue Levels for Triclopyr and its metabolites 3,5,6,-trichloro-2-pyridinol and 2-methoxy-3,5,6-trichloropyridine [40 CFR 180.417 (a)(1)]: for the combined residues of the herbicide in or on the following raw agricultural commodities: fish 3.0 ppm; grass, forage 500 ppm; grass, forage, hay 500 ppm;shellfish3.5 ppm.[40 CFR 180.417 (a)(2)]: in or on the following agricultural commodities: egg 0.05 ppm; meat, fat, and meat byproducts, except kidney and liver, of cattle, goat, hog, horse and sheep 0.05 ppm; meat, fat, and meat byproducts, except kidney, of poultry 0.1 ppm; milk 0.01 ppm; liver and kidney of cattle, goat, hog, horse and sheep 0.5 ppm; rice, grain 0.3 ppm; rice, straw10.0 ppm.
Trade name[Note: See the following record, Triclopyr, triethylamine salt, for trade names containing the salt of triclopry] ACCESS®; CROSSBOW®, (triclopyr + 2,4-D ester); ET®; GARLON®; GRAZON® Triclopyr; PATHFINDER®; REDEEM®; RELY®; REMEDY®; RIVERDALE TAHOE® Nufarm (Australia); TURFLON®
Safety ProfileModerately toxic by ingestion. Anexperimental teratogen. Experimental reproductiveeffects. Used as an herbicide. When heated todecomposition it emits toxic fumes of Clí and NOx.
Environmental FateSoil. In soil, triclopyr degraded to 3,5,6-trichloro-2-pyridinol and 2-methoxy-3,5,6- trichloropyridine (Norris et al., 1987). The major route of dissipation from soil is likely due to microbial degradation (Newton et al., 1990).
Fifty-four days after triclopyr was applied to soil at a rate of 5.6 kg/ha, the majority (65%) remained in the top 10 cm of soil (Lee et al., 1986a).
Ashton and Monaco (1991) reported triclopyr had an average half-life of 46 days and is in?uenced by soil type and climatic conditions.
Plant. Lewer and Owen (1989) found 3,5,6-trichloro-2-pyridinol as the major metab- olite in plants. Cultured soybean cells metabolized triclopyr to dimethyl triclopyr-aspartate and dimethyl triclopyr-glutamate which can be rehydrolyzed to form the parent compound.
At an application rate of 3.4 kg/ha, the dissipation half-life was 3.7 days. At an application rate of 3.3 kg/ka, the dissipation half-lives of triclopyr in brown, browse and litter samples were 73.5, 202.3 and 31 days, respectively (Norris et al., 1987).



Metabolic pathwayAfter 7 days in a soybean cell suspension culture, the major metabolites of trichlopyr are formed and identified as the aspartate (major) and glutamate (minor) amide conjugates.
MetabolismThe average half-life of triclopyr in soil is 46 days. Because triclopyr is sensitive to light, the length of time that it remains on the surface may moderate its persistence. Adsorption to soil is limited and is governed by the anion exchange capacity. Insignificant amounts are lost via volatilization. The propensity of triclopyr to translocate in the environment with soil water, is unknown.
Toxicity evaluationThe acute oral LD50 of triclopyr is 692 mg/kg and 577 mg/kg for male and female rat, respectively. It does not appear to undergo significant transformation and is excreted in the urine primarily unchanged.
Triclopyr Preparation Products And Raw materials
Raw materials2,3,5,6-Tetrachloropyridine
Sodium 3,5,6-trichloropyridin-2-olate 3-Chloro-2-ethoxypyridine Acetoxyacetic acid 3-Chloropyridin-2-ol TRICLOPYR METHYL ESTERSUFFIX ADDED TO CAS TO DIFFERENTIATE FROM NON-DEUTERATED/DERIVATIZED COMPOUND. 2,3-Dichloropyridine 5-CHLORO-2-HYDROXYPYRIDINE Triclopyr (2-Pyridinyloxy)acetic acid 4-Methoxyphenylacetic acid 5-Chloro-2-methoxypyridine 2-Ethoxypyridine Methyl trichloroacetate Methoxyacetic acid 3,5-Dichloropyridine acetic acid, triethoxy-, ethyl ester 2-CHLORO-6-ETHOXYPYRIDINE Trichloroacetic acid

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