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Herbicides

Bromoxynil

Also known as 3,5-Dibromo-4-hydroxybenzonitrile, Brominal, Brominil

CAS 1689-84-5Formula C7H3Br2NOMolar mass 276.92 g/molEC 216-882-7
GHS signal word: Danger. Pictograms: Acute toxicity (severe), Serious health hazard, Hazardous to the environment 21 suppliers listed
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Bromoxynil chemical structure, C7H3Br2NO, CAS 1689-84-5
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
White crystalline solid
Melting point
194 to 195
Solubility
IN WATER 130 PPM (0.013%) WT/VOL @ 20-25 °C, IN ETHANOL 7% WT/VOL @ 20-25 °C, IN LIGHT P…
HS code
292690
Category
Herbicides
UN number
UN 2811
Illustrative photo, colourless crystals in an open fibre drum in a chemical plant
Typical packagingIllustrative packaging image, not the actual product

What is Bromoxynil?

Plain description, key identifiers and synonyms

3,5-dibromo-4-hydroxybenzonitrile is a dibromobenzene that is 2,6-dibromophenol substituted by a cyano group at position 4. It has a role as a herbicide, a xenobiotic and an environmental contaminant. It is a hydroxynitrile, a member of phenols and a dibromobenzene. It is functionally related to a 2,6-dibromophenol. It is a conjugate acid of a 3,5-dibromo-4-oxidobenzonitrile(1-).

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
3,5-dibromo-4-hydroxybenzonitrile
CAS number
1689-84-5 CAS number cross-checked
EC number
216-882-7
Molecular formula
C7H3Br2NO
UNII
J46EK95K0P
MDL number
MFCD00002153
InChIKey
UPMXNNIRAGDFEH-UHFFFAOYSA-N
InChI
InChI=1S/C7H3Br2NO/c8-5-1-4(3-10)2-6(9)7(5)11/h1-2,11H
SMILES (canonical and isomeric)
C1=C(C=C(C(=C1Br)O)Br)C#N

Synonyms

  • 3,5-Dibromo-4-hydroxybenzonitrile
  • Brominal
  • Brominil
  • Broxynil
  • Sabre
  • Brominex
  • Labuctril
  • Pardner
  • Toplan
  • 2,6-Dibromo-4-cyanophenol
  • Brittox
  • Buctril
  • Labuctril 25
  • Chipco buctril
  • ME 4 Brominal
  • Nu-lawn weeder
  • Oxytril M
  • Bromotril
  • Certrol B
  • Litarol M
  • Buctril industrial
  • Chipco crab-kleen
  • 4-Cyano-2,6-dibromophenol
  • Butilchorofos
  • Novacorn
Show all 39 synonyms
  • Terset
  • Butil chlorofos
  • 4-Hydroxy-3,5-dibromobenzonitrile
  • Benzonitrile, 3,5-dibromo-4-hydroxy-
  • Brominal Triple
  • Brominal Plus
  • Brominal Industrial
  • Bromoxynil (ACN)
  • 3,5-Dibromo-4-hydroxyphenylcyanide
  • 3,5-Dibromo-4-hydroxyphenyl cyanide
  • ENT 20852
  • MB 10064
  • Brucil
  • 3,5-Dibromo-4-hydroxybenzonitril (ACN)

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 crystalline solidexp.
Odour
ODORLESS WHEN PUREexp.
Melting point
194 to 195exp.
Solubility
IN WATER 130 PPM (0.013%) WT/VOL @ 20-25 °C, IN ETHANOL 7% WT/VOL @ 20-25 °C, IN LIGHT PETROLEUM & XYLENE 1-2% WT/VOL @ 20-25 °Cexp.
Vapour pressure
1.7 × 10⁻¹ mPa /1.28 × 10⁻⁶ mm Hg/ at 25 °Cexp.

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
276.92 g/molcalc.
Exact mass
274.8581 Dacalc.
LogP (octanol/water)
2.79calc.
Topological polar surface area
44.02 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
0calc.
Heavy atoms
11calc.
Rings
1calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0calc.
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
GHS06: Acute toxicity (severe)
Acute toxicity (severe)
GHS08: Serious health hazard
Serious health hazard
GHS09: Hazardous to the environment
Hazardous to the environment

Hazard statements

  • H301Toxic if swallowed.
  • H317May cause an allergic skin reaction.
  • H330Fatal if inhaled.
  • H361dSuspected of damaging the unborn child.
  • H400Very toxic to aquatic life.
  • H410Very toxic to aquatic life with long lasting effects.
Precautionary statements (24)
  • P203Obtain, read and follow all safety instructions before use.
  • P260Do not breathe dust, fume, gas, mist, vapours or spray.
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • 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.
  • P284In case of inadequate ventilation wear respiratory protection.
  • P301 + P316If swallowed: Get emergency medical help immediately.
  • P302 + P352If on skin: Wash with plenty of water.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P316Get emergency medical help immediately.
  • P318If exposed or concerned, get medical advice.
  • P320Specific treatment is urgent (see supplemental first aid instructions on the label).
  • 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.
  • P391Collect spillage.
  • 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 2811

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

Bromoxynil suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

All 21 suppliers
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Suppliers marked Unclaimed profile have not claimed their profile yet. They are not verified by CompoundList, their offers are price on request and details may have changed, so please confirm them with the supplier. Company representatives can claim a profile with a business email on the company's own website domain. Our team verifies each claim and sends the result by email.

Where suppliers are based

21 suppliers in 6 countries

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Bromoxynil price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

Selective, postemergence, contact herbicide.

Bromoxynil and its esters are widely used as selective contact herbicides for post-emergent control of broad-leaved weed. They are often included in mixtures with other herbicides to broaden the spectrum of control.

Use classes: Herbicides, Transformation products, Pesticides, Pesticide transformation products.

Roles

  • environmental contaminant
  • herbicide
  • pesticide
  • xenobiotic

Functional uses

  • Biocide

How it is made

Bromoxynil is produced by reaction of sodium hypobromide with 4-hydroxybenzonitrile.

Bromoxynil may be made by: (1) bromination of 4-hydroxybenzaldehyde followed by reaction with hydroxylamine to give the oxime, followed by dehydration of the oxime to the nitrile, or, (2) the action of sodium hypobromite as the brominating agent on 4-hydroxybenzonitrile.

Bromoxynil can be prepared by action of ... hydroxylamine on 3,5-dibromo-4-hydroxybenzaldehyde followed by dehydration of resulting aldoxime.

Regulatory status

Inventories, regulations and trade controls that list this substance

Europe

  • EU harmonised classification (CLP Annex VI)
    Index no: 608-006-00-0

Health and food

  • EU Cosmetics Regulation Annex II, prohibited in cosmetics
    Name: Bromoxynil (ISO) 3,5-Dibromo-4-hydroxybenzonitrile [1] and Bromoxynil heptanoate (ISO) [2], Ref no: 1031, Annex ref: II/1031

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Bromoxynil is traded under.

HS 2926.90Indicative HS code

Nitrile-function compounds, other

World exports in 2024
$2.15B
−13.5% vs 2023, imports $2.17B
2019 to 2024
Top exporters
  1. China35.6%
  2. France * partner reported12.7%
  3. India * partner reported11.2%
Top importers
  1. United States13.6%
  2. China12.4%
  3. Brazil11.9%

* Partner reported figures, a lower bound.

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

The HS code shown for Bromoxynil is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Bromoxynil, based on the data on this page

What is Bromoxynil?

3,5-dibromo-4-hydroxybenzonitrile is a dibromobenzene that is 2,6-dibromophenol substituted by a cyano group at position 4. It has a role as a herbicide, a xenobiotic and an environmental contaminant. It is a hydroxynitrile, a member of phenols and a dibromobenzene. It is functionally related to a 2,6-dibromophenol.

What is the CAS number of Bromoxynil?

The CAS registry number of Bromoxynil is 1689-84-5.

What is the molecular formula and weight of Bromoxynil?

The molecular formula of Bromoxynil is C7H3Br2NO and its molar mass is 276.92 g/mol.

What is Bromoxynil used for?

Selective, postemergence, contact herbicide. Bromoxynil and its esters are widely used as selective contact herbicides for post-emergent control of broad-leaved weed. They are often included in mixtures with other herbicides to broaden the spectrum of control.

Is Bromoxynil hazardous?

Bromoxynil carries the GHS signal word "Danger". Main hazards: toxic if swallowed, may cause an allergic skin reaction, fatal if inhaled. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Bromoxynil?

Bromoxynil is usually classified under HS code 292690 (Nitrile-function compounds, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Bromoxynil?

CompoundList lists 21 suppliers of Bromoxynil in China, United States, Australia, Germany and 2 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Bromoxynil in India?

1 supplier in India list Bromoxynil on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Bromoxynil?

Suppliers quote Bromoxynil 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 Bromoxynil

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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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