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Picture of (2,4,5-trichlorophenoxy)acetic acid

(2,4,5-trichlorophenoxy)acetic acid

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Origin: China

CasNo: 93-76-5

specification: 99%min

Min order Quantity: 1 /kg

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  • Products Specification
  • Description
  • Property

    CAS No.: 93-76-5 Formula: C8H5Cl3O3 Molecular Weight: 255.48300

    Description

    2,4,5-Trichlorophenoxyacetic acid (also known as 2,4,5-T), a synthetic auxin, is a chlorophenoxy acetic acid herbicide used to defoliate broad-leafed plants. It was developed in the late 1940s and was widely used in the agricultural industry until being phased out, starting in the late 1970s due to toxicity concerns. Agent Orange, a defoliant used by the British in the Malayan Emergency and the U.S. in the Vietnam War (Vietnam Conflict), was equal parts 2,4,5-T and 2,4-D (2,4-dichlorophenoxyacetic acid). 2,4,5-T itself is toxic with a NOAEL of 3mg/kg/day and a LOAEL of 10mg/kg/day.[medical citation needed] Additionally, the manufacturing process for 2,4,5-T contaminates this chemical with trace amounts of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD). TCDD is a carcinogenic persistent organic pollutant with long-term effects on the environment. With proper temperature control during production of 2,4,5-T, TCDD levels can be held to about .005 ppm. Before the TCDD risk was well-understood, early production facilities lacked proper temperature controls and individual batches tested later were found to have as much as 60 ppm of TCDD.; In 1970, the United States Department of Agriculture halted the use of 2,4,5-T on all food crops except rice, and in 1985, the EPA terminated all remaining uses in the U.S. of this herbicide. The international trade of 2,4,5-T is restricted by the Rotterdam Convention. 2,4,5-T has since largely been replaced by dicamba and triclopyr.
    Human health effects from 2,4,5-T at low environmental doses or at biomonitored levels from low environmental exposures are unknown. Intentional overdoses and unintentional high dose occupational exposures to chlorophenoxy acid herbicides have resulted in weakness, headache, dizziness, nausea, abdominal pain, myotonia, hypotension, renal and hepatic injury, and delayed neuropathy.[medical citation needed]. Cometabolism of 2,4,5-T is possible to produce 3,5-dichlorocatechol which, in turn, can be degraded by Pseudomona bacteria. IARC considers the chlorophenoxyacetic acids group of chemicals as possibly carcinogenic to humans.

    Basic Info

    Chemical Name (2,4,5-trichlorophenoxy)acetic acid
    Synonyms

    Reddon;
    Phortox;
    Forron;
    VEON;
    Trioxon;
    Tippon;
    Reddox;
    2,4,5-trichlorophenoxy-acetic acid;
    Fortex;
    Acetic acid, (2,4,5-trichlorophenoxy)-;
    arbokan;

    CAS No. 93-76-5
    Molecular Formula C8H5Cl3O3
    Molecular Weight 255.48300
    PSA 46.53000
    LogP 3.11020

    Properties

    Appearance & Physical State Colorless to tan, odorless, crystalline solid.
    Density 1.592
    Boiling Point 376.3ºC
    Melting Point 154-158ºC
    Flash Point 181.4ºC
    Stability Stable. Incompatible with strong bases, strong oxidizing agents, alkali metals, amines, alcohols. Reacts with many common metals.
    Storage Condition 0-6ºC

    Safety Info

    RTECS AJ8400000
    Hazard Class 6.1(b)
    Safety Statements S24-S60-S61
    HS Code 2918990090
    Packing Group III
    WGK Germany 3
    RIDADR UN 2811
    Risk Statements R22; R36/37/38; R50/53
    Hazard Codes Xn; N

    Synthesis Route

    2-(2,5-dichlorophenoxy)acetic acid(2,4,5-trichlorophenoxy)acetic acid
    chloroacetic acid+2,4,5-trichlorophenol(2,4,5-trichlorophenoxy)acetic acid
    2,4,5-trichlorophenol(2,4,5-trichlorophenoxy)acetic acid

    Precursor

    2-(2,5-dichlorophenoxy)acetic acid
    2-(2,4,5-trichlorophenoxy)acetonitrile
    chloroacetic acid
    2,4,5-trichlorophenol

    Downstream Product

    ethyl 2-(2,4,5-trichlorophenoxy)acetate
    2,4,5-T-2-ethylhexyl
    N-phenyl-2-(2,4,5-trichlorophenoxy)acetamide
    2,4,5-trichlorophenol

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