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(2,4-Dichlorophenoxy)acetic acid

Also known as 2,4-dichlorophenoxyacetic acid, 2-(2,4-dichlorophenoxy)acetic acid, Dicopur

CAS 94-75-7Formula C8H6Cl2O3Molar mass 221.04 g/molEC 202-361-1
GHS signal word: Danger. Pictograms: Corrosive, Harmful or irritant 316 suppliers listed
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(2,4-Dichlorophenoxy)acetic acid chemical structure, C8H6Cl2O3, CAS 94-75-7
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
White to yellow crystalline powder /SRP: yellow color is phenolic impurities/
Melting point
138 °C
Boiling point
160 °C
Density
Relative density (water = 1): 0.7-0.8
Solubility
Needles from alcohol. Solubility in water: 3.5% /2,4-D, sodium salt/
HS code
291899
Category
Herbicides
UN number
UN 3077
Illustrative photo, off-white crystalline powder in fibre drums in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is (2,4-Dichlorophenoxy)acetic acid?

Plain description, key identifiers and synonyms

2,4-D is a chlorophenoxyacetic acid that is phenoxyacetic acid in which the ring hydrogens at postions 2 and 4 are substituted by chlorines. It has a role as a defoliant, a synthetic auxin, an agrochemical, a phenoxy herbicide, an EC 1.1.1.25 (shikimate dehydrogenase) inhibitor and an environmental contaminant. It is a chlorophenoxyacetic acid and a dichlorobenzene. It is a conjugate acid of a (2,4-dichlorophenoxy)acetate.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
2-(2,4-dichlorophenoxy)acetic acid
CAS number
94-75-7 CAS number cross-checkedOther or deprecated CAS: 64296-19-1
EC number
202-361-1
Molecular formula
C8H6Cl2O3
UNII
2577AQ9262
MDL number
MFCD00004300
InChIKey
OVSKIKFHRZPJSS-UHFFFAOYSA-N
InChI
InChI=1S/C8H6Cl2O3/c9-5-1-2-7(6(10)3-5)13-4-8(11)12/h1-3H,4H2,(H,11,12)
SMILES (canonical and isomeric)
C1=CC(=C(C=C1Cl)Cl)OCC(=O)O

Synonyms

  • 2,4-dichlorophenoxyacetic acid
  • 2-(2,4-dichlorophenoxy)acetic acid
  • Dicopur
  • B-Selektonon
  • Fernimine
  • Netagrone
  • Amoxone
  • Ipaner
  • Pielik
  • Rhodia
  • Chloroxone
  • Vergemaster
  • Agrotect
  • Dormone
  • Tributon
  • Estone
  • Moxone
  • Phenox
  • Crop rider
  • Mota Maskros
  • Verton 2D
  • Pennamine D
  • Foredex 75
  • Weed-Rhap
  • Vidon 638
Show all 39 synonyms
  • Weed-ag-bar
  • Weedone lv4
  • Diclordon
  • Herbidal
  • Weedatul
  • Weedez wonder bar
  • Weedtrol
  • Ferxone
  • Weed-B-gon
  • Emulsamine bk
  • Brush-rhap
  • Envert dt
  • Lawn-keep
  • Weed tox

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

Appearance
White to yellow crystalline powder /SRP: yellow color is phenolic impurities/exp.
Odour
Oodorlessexp.
Melting point
138 °Cexp.
Boiling point
160 °Cexp.
Density
Relative density (water = 1): 0.7-0.8exp.
Solubility
Needles from alcohol. Solubility in water: 3.5% /2,4-D, sodium salt/exp.
Vapour pressure
1.40 × 10⁻⁷ mm Hg at 20 °C (1.86 × 10⁻² mPa at 25 °C)exp.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
221.04 g/molcalc.
Exact mass
219.9694 Dacalc.
LogP (octanol/water)
2.46calc.
Topological polar surface area
46.53 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
3calc.
Heavy atoms
13calc.
Rings
1calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0.13calc.
Formal charge
0calc.
Stereocentres
0calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, c1ccccc1

c1ccccc1

1 ring, 6 atoms, the Benzene ring system.

485,677 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Danger
GHS05: Corrosive
Corrosive
GHS07: Harmful or irritant
Harmful or irritant

Hazard statements

  • H302Harmful if swallowed.
  • H317May cause an allergic skin reaction.
  • H318Causes serious eye damage.
  • H335May cause respiratory irritation.
  • H412Harmful to aquatic life with long lasting effects.
Precautionary statements (21)
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P270Do not eat, drink or smoke when using this product.
  • P271Use only outdoors or in a well-ventilated area.
  • P272Contaminated work clothing should not be allowed out of the workplace.
  • P273Avoid release to the environment.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P301 + P317If swallowed: Get medical help.
  • P302 + P352If on skin: Wash with plenty of water.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P305 + P354 + P338If in eyes: Immediately rinse with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P317Get medical help.
  • P319Get medical help if you feel unwell.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P330Rinse mouth.
  • P333 + P317If skin irritation or rash occurs: Get medical help.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • P403 + P233Store in a well-ventilated place. Keep container tightly closed.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.
UN number
UN 3077
Transport hazard class
9
Packing group
III

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Full safety data and first aid

(2,4-Dichlorophenoxy)acetic acid suppliers

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All 316 suppliers
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Where suppliers are based

316 suppliers in 29 countries

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(2,4-Dichlorophenoxy)acetic acid price

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Uses and applications

What the substance is used for, by industry and function

/Herbicide used on/ ... asparagus, cereals, corn, grasses, hay, rice, sorghum, soybeans (preplant), sugarcane, fallow land, pasture, rangeland, turf, and noncropland for control of annual mustard, Canada thistle, dandelion, lambsquarters, ragweed, etc. Many broadleaf crops (cotton, grapevines) are extremely sensitive. Aqua-Kleen for control of aquatic weeds in lakes and ponds. Citrus Fix in lemon packinghouses, prevents preharvest drop of mature citrus. Pyresta controls broadleaf weeds and susceptible woody plants. Cimarron Max for pastures, rangeland or established grasses on acres enrolled in conservation reserve programs. Restore II for pastures and rangelands. Rush 24 for use on barley and wheat (spring, durum).

Used post-emergence for selective control of broadleaf weeds. ... registered for use on a variety of food/feed sites including field, fruit and vegetable crops. ...

Read more

also registered for use on turf, lawns, rights-of-way, aquatic sites, forestry applications ... used as a plant growth regulator in citrus.

2,4-D, its salts & esters are systemic herbicides, widely used for weed control in cereals and other crops.

Industrial uses: Intermediate, Other.

Use classes: Pesticides, Herbicides, Transformation products, Herbicides, Plant growth regulators.

Pharmacological actions

  • Herbicides

Roles

  • agonist
  • agrochemical
  • auxin
  • defoliant
  • environmental contaminant
  • enzyme inhibitor
  • growth regulator
  • herbicide
  • hormone
  • molecular messenger
  • pesticide
  • phenoxy herbicide
  • plant growth regulator
  • plant hormone
  • synthetic auxin
  • xenobiotic

Functional uses

  • Biocide

How it is made

2,4-D is produced by interaction of 2,4-dichlorophenolate with monochloroacetic acid.

Reaction of 2,4-dichlorophenol and chloroacetic acid in aqueous sodium hydroxide.

Regulatory status

Inventories, regulations and trade controls that list this substance

Europe

  • EU harmonised classification (CLP Annex VI)
    Index no: 607-039-00-8

United States

  • TSCA inventory (USA)
    Status: Active in US commerce

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code (2,4-Dichlorophenoxy)acetic acid is traded under.

HS 2918.99Indicative HS code

Carboxylic acids, with additional oxygen function (not alcohol, phenol, aldehyde or ketone)…

World exports in 2024
$1.46B
−1.1% vs 2023, imports $1.54B
2019 to 2024
Top exporters
  1. China40.0%
  2. India * partner reported26.6%
  3. Germany8.0%
Top importers
  1. United States25.6%
  2. Brazil6.7%
  3. Argentina5.9%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

The HS code shown for (2,4-Dichlorophenoxy)acetic acid is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about (2,4-Dichlorophenoxy)acetic acid, based on the data on this page

What is (2,4-Dichlorophenoxy)acetic acid?

2,4-D is a chlorophenoxyacetic acid that is phenoxyacetic acid in which the ring hydrogens at postions 2 and 4 are substituted by chlorines. It has a role as a defoliant, a synthetic auxin, an agrochemical, a phenoxy herbicide, an EC 1.1.1.25 (shikimate dehydrogenase) inhibitor and an environmental contaminant.

What is the CAS number of (2,4-Dichlorophenoxy)acetic acid?

The CAS registry number of (2,4-Dichlorophenoxy)acetic acid is 94-75-7. Other or deprecated CAS numbers: 64296-19-1.

What is the molecular formula and weight of (2,4-Dichlorophenoxy)acetic acid?

The molecular formula of (2,4-Dichlorophenoxy)acetic acid is C8H6Cl2O3 and its molar mass is 221.04 g/mol.

What is (2,4-Dichlorophenoxy)acetic acid used for?

/Herbicide used on/ ... asparagus, cereals, corn, grasses, hay, rice, sorghum, soybeans (preplant), sugarcane, fallow land, pasture, rangeland, turf, and noncropland for control of annual mustard, Canada thistle, dandelion, lambsquarters, ragweed, etc. Many broadleaf crops (cotton, grapevines) are extremely sensitive.

Is (2,4-Dichlorophenoxy)acetic acid hazardous?

(2,4-Dichlorophenoxy)acetic acid carries the GHS signal word "Danger". Main hazards: harmful if swallowed, may cause an allergic skin reaction, causes serious eye damage. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of (2,4-Dichlorophenoxy)acetic acid?

(2,4-Dichlorophenoxy)acetic acid is usually classified under HS code 291899 (Carboxylic acids with additional oxygen function and their anhydrides, halides…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy (2,4-Dichlorophenoxy)acetic acid?

CompoundList lists 316 suppliers of (2,4-Dichlorophenoxy)acetic acid in China, Brazil, United States, India and 25 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy (2,4-Dichlorophenoxy)acetic acid in India?

16 suppliers in India list (2,4-Dichlorophenoxy)acetic acid on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of (2,4-Dichlorophenoxy)acetic acid?

Suppliers quote (2,4-Dichlorophenoxy)acetic acid on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle (2,4-Dichlorophenoxy)acetic acid

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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