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Herbicides

2,4,5-Trichlorophenol

Also known as Collunosol, Dowicide 2, Phenol, 2,4,5-trichloro-

CAS 95-95-4Formula C6H3Cl3OMolar mass 197.45 g/molEC 202-467-8
GHS signal word: Warning. Pictograms: Harmful or irritant, Hazardous to the environment 23 suppliers listed
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2,4,5-Trichlorophenol chemical structure, C6H3Cl3O, CAS 95-95-4
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Needles from alcohol, petroleum ether
Melting point
67 °C
Boiling point
262 °C
Density
1.678 at 25 °C/4 °C
Flash point
133 °C
HS code
290819
Category
Herbicides
UN number
UN 2020
Illustrative photo, drums, an IBC tote and sacks in a chemical warehouse in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is 2,4,5-Trichlorophenol?

Plain description, key identifiers and synonyms

2,4,5-trichlorophenol is a trichlorophenol carrying chloro groups at positions 2, 4 and 5.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
2,4,5-trichlorophenol
CAS number
95-95-4 CAS number cross-checked
EC number
202-467-8
Molecular formula
C6H3Cl3O
UNII
32526637PN
MDL number
MFCD00002170
InChIKey
LHJGJYXLEPZJPM-UHFFFAOYSA-N
InChI
InChI=1S/C6H3Cl3O/c7-3-1-5(9)6(10)2-4(3)8/h1-2,10H
SMILES (canonical and isomeric)
C1=C(C(=CC(=C1Cl)Cl)Cl)O

Synonyms

  • Collunosol
  • Dowicide 2
  • Phenol, 2,4,5-trichloro-
  • Preventol I
  • 2,4,5-TCP
  • Triclofenol
  • 2,4,5-Trichloro phenol
  • RCRA waste number U230
  • 2,4,5-Trichloro-phenol
  • RCRA waste no. U230
  • Dowcide 2
  • 2,5-Trichlorophenol
  • 06B - Phenols
  • 18B - Phenols
  • 2,4,5-trichlorphenol
  • Dowicide B (Salt/Mix)
  • 2,4,5-Trichlorophenol, 95%
  • 2,4,5-Trichlorophenol 100 microg/mL in Methanol
  • 2,4,5-Trichlorophenol, purum, >=95.0% (GC)
  • 2,4,5-trichlorophenol Solution in Toluene, 100ug/mL
  • 2,4,5-Trichlorophenol, PESTANAL(R), analytical standard

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
Needles from alcohol, petroleum etherexp.
Odour
Strong phenolic odorexp.
Taste
Taste threshold concentration in water is 1.0 ug/Lexp.
Melting point
67 °Cexp.
Boiling point
262 °Cexp.
Density
1.678 at 25 °C/4 °Cexp.
Flash point
133 °Cexp.
Solubility
In water, 1,200 mg/L at 25 °Cexp.
Vapour pressure
1 mm Hg at 72.0 °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
197.45 g/molcalc.
Exact mass
195.9249 Dacalc.
LogP (octanol/water)
3.35calc.
Topological polar surface area
20.23 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
1calc.
Rotatable bonds
0calc.
Heavy atoms
10calc.
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
Warning
GHS07: Harmful or irritant
Harmful or irritant
GHS09: Hazardous to the environment
Hazardous to the environment

Hazard statements

  • H302Harmful if swallowed.
  • H315Causes skin irritation.
  • H319Causes serious eye irritation.
  • H400Very toxic to aquatic life.
  • H410Very toxic to aquatic life with long lasting effects.
Precautionary statements (15)
  • 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.
  • 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.
  • P305 + P351 + P338If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P330Rinse mouth.
  • P332 + P317If skin irritation occurs: Get medical help.
  • P337 + P317If eye irritation persists: Get medical help.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • P391Collect spillage.
  • P501Dispose of contents and container in accordance with local regulations.
UN number
UN 2020
Transport hazard class
6.1
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

2,4,5-Trichlorophenol suppliers

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All 23 suppliers
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Where suppliers are based

23 suppliers in 6 countries

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2,4,5-Trichlorophenol 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

Fungicide, bactericide, biocide (Former), intermediate in production of herbicides.

Intermediate in the manufacture of the herbicide 2,4,5-trichlorophenoxyacetic acid. Also used in the manufacture of 3 other chemicals used as pesticides: silvex (2-(2,4,5-trichlorophenoxy)propionic acid), ronnel (o,o-dimethyl-o-2,4,5-trichlorophenyl phosphorothionate), and sodium 2,4,5-trichlorophenate.

Used in cooling towers, paper and pulp mill systems, hide and leather processing and disinfection. (Former).

2,4,5-Trichlorophenol is used as a fungicide in paper and pulp mills, as an herbicide, and as an intermediate in the manufacture of other pesticides (e.g., the herbicides 2,4,5-trichlorophenoxyacetic acid and Silvex and the insecticide Ronnel).

How it is made

Prepared by treating 1,2,4,5-tetrachlorobenzene with methanolic NaOH in autoclave at 160 °For several hr.

Regulatory status

Inventories, regulations and trade controls that list this substance

Europe

  • EU harmonised classification (CLP Annex VI)
    Index no: 604-017-00-X

United States

  • TSCA inventory (USA)
    Status: Active in US commerce, Regulatory flags: Section 4 test rule or order

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code 2,4,5-Trichlorophenol is traded under.

HS 2908.19Indicative HS code

Derivatives containing only halogen substituents and their salts, other

World exports in 2024
$452M
−8.2% vs 2023, imports $435M
2019 to 2024
Top exporters
  1. Jordan * partner reported36.5%
  2. Israel29.6%
  3. China6.5%
Top importers
  1. China58.6%
  2. South Korea10.3%
  3. United States5.5%

* Partner reported figures, a lower bound.

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

The HS code shown for 2,4,5-Trichlorophenol is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about 2,4,5-Trichlorophenol, based on the data on this page

What is 2,4,5-Trichlorophenol?

2,4,5-trichlorophenol is a trichlorophenol carrying chloro groups at positions 2, 4 and 5.

What is the CAS number of 2,4,5-Trichlorophenol?

The CAS registry number of 2,4,5-Trichlorophenol is 95-95-4.

What is the molecular formula and weight of 2,4,5-Trichlorophenol?

The molecular formula of 2,4,5-Trichlorophenol is C6H3Cl3O and its molar mass is 197.45 g/mol.

What is 2,4,5-Trichlorophenol used for?

Fungicide, bactericide, biocide (Former), intermediate in production of herbicides. Intermediate in the manufacture of the herbicide 2,4,5-trichlorophenoxyacetic acid.

Is 2,4,5-Trichlorophenol hazardous?

2,4,5-Trichlorophenol carries the GHS signal word "Warning". Main hazards: harmful if swallowed, causes skin irritation, causes serious eye irritation. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of 2,4,5-Trichlorophenol?

2,4,5-Trichlorophenol is usually classified under HS code 290819 (Derivatives containing only halogen substituents and their salts, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy 2,4,5-Trichlorophenol?

CompoundList lists 23 suppliers of 2,4,5-Trichlorophenol in China, United States, Switzerland, Germany and 2 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of 2,4,5-Trichlorophenol?

Suppliers quote 2,4,5-Trichlorophenol 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 2,4,5-Trichlorophenol

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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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