CompoundList
Sign in
Impurities and reference standards

4-Chlorocatechol

Also known as 4-chlorobenzene-1,2-diol, 4-Chloropyrocatechol, 4-Chloro-1,2-benzenediol

CAS 2138-22-9Formula C6H5ClO2Molar mass 144.56 g/molEC 218-381-9
GHS signal word: Danger. Pictograms: Corrosive 7 suppliers listed
Get quotes Compare 7 suppliers
4-Chlorocatechol chemical structure, C6H5ClO2, CAS 2138-22-9
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
2138-22-9
Formula
C6H5ClO2
Molar mass
144.56 g/mol
EC number
218-381-9
HS code
290819
Category
Impurities and reference standards

What is 4-Chlorocatechol?

Plain description, key identifiers and synonyms

4-chlorocatechol is a chlorocatechol that is catechol substituted by a chloro group at position 4. It has a role as a bacterial xenobiotic metabolite. It is a chlorocatechol and a member of monochlorobenzenes.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
4-chlorobenzene-1,2-diol
CAS number
2138-22-9 CAS number cross-checked
EC number
218-381-9
Molecular formula
C6H5ClO2
UNII
I01EXU3P3J
MDL number
MFCD00059614
InChIKey
WWOBYPKUYODHDG-UHFFFAOYSA-N
InChI
InChI=1S/C6H5ClO2/c7-4-1-2-5(8)6(9)3-4/h1-3,8-9H
SMILES (canonical and isomeric)
C1=CC(=C(C=C1Cl)O)O

Synonyms

  • 4-chlorobenzene-1,2-diol
  • 4-Chloropyrocatechol
  • 4-Chloro-1,2-benzenediol
  • 1,2-Benzenediol, 4-chloro-
  • Pyrocatechol, 4-chloro-
  • 4-Chloro catechol
  • 4-Chloro-1,2-dihydroxybenzene
  • 4-Chloro-benzene-1,2-diol
  • 4-Chloro-Pyrocatechol
  • 3,4-Dihydroxychlorobenzene
  • 4-Chlorocatechol, 97%
  • Phloroglucinol Impurity 109
  • 4-Chloro-1,2-benzenediol #
  • 4-06-00-05614 (Beilstein Handbook Reference)

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

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

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
144.56 g/molcalc.
Exact mass
143.9978 Dacalc.
LogP (octanol/water)
1.75calc.
Topological polar surface area
40.46 Ųcalc.
Hydrogen bond donors
2calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
0calc.
Heavy atoms
9calc.
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
GHS05: Corrosive
Corrosive

Hazard statements

  • H314Causes severe skin burns and eye damage.
Precautionary statements (12)
  • P260Do not breathe dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P301 + P330 + P331If swallowed: Rinse mouth. Do not induce vomiting.
  • P302 + P361 + P354If on skin: Take off immediately all contaminated clothing. Immediately rinse with water for several minutes.
  • 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.
  • P316Get emergency medical help immediately.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P363Wash contaminated clothing before reuse.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.

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

4-Chlorocatechol suppliers

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

All 7 suppliers
7 of 7 offers

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

7 suppliers in 3 countries

Send one request to many suppliers

Choose up to 10 suppliers or let us match your request. Compare quotes side by side, free.

Choose suppliersPost a request

4-Chlorocatechol price

Indicative price range per kg from live supplier offers

No published prices right now

Suppliers quote this chemical on request. Send one free request and compare quotes side by side.

Get latest price

Uses and applications

What the substance is used for, by industry and function

Roles

  • bacterial metabolite
  • bacterial xenobiotic metabolite
  • metabolite
  • prokaryotic metabolite
  • xenobiotic metabolite

Regulatory status

Inventories, regulations and trade controls that list this substance

No regulatory list memberships are recorded for this substance yet. Always check the rules of the importing and exporting country before trade.

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code 4-Chlorocatechol 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 4-Chlorocatechol is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about 4-Chlorocatechol, based on the data on this page

What is 4-Chlorocatechol?

4-chlorocatechol is a chlorocatechol that is catechol substituted by a chloro group at position 4. It has a role as a bacterial xenobiotic metabolite. It is a chlorocatechol and a member of monochlorobenzenes.

What is the CAS number of 4-Chlorocatechol?

The CAS registry number of 4-Chlorocatechol is 2138-22-9.

What is the molecular formula and weight of 4-Chlorocatechol?

The molecular formula of 4-Chlorocatechol is C6H5ClO2 and its molar mass is 144.56 g/mol.

What is 4-Chlorocatechol used for?

Known uses and roles of 4-Chlorocatechol include bacterial metabolite, bacterial xenobiotic metabolite, metabolite, prokaryotic metabolite and xenobiotic metabolite.

Is 4-Chlorocatechol hazardous?

4-Chlorocatechol carries the GHS signal word "Danger". Main hazards: causes severe skin burns and eye damage. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of 4-Chlorocatechol?

4-Chlorocatechol 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 4-Chlorocatechol?

CompoundList lists 7 suppliers of 4-Chlorocatechol in China, United States and Czech Republic. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of 4-Chlorocatechol?

Suppliers quote 4-Chlorocatechol 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 4-Chlorocatechol

Get quotes for 4-Chlorocatechol

Post one free request with your grade, quantity and destination. Matching suppliers send quotes you can compare side by side.
Post a request Sell 4-Chlorocatechol
Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
Embed this structure on your websiteShow code

Paste this code into your page to show the 2D structure of 4-Chlorocatechol with a 3D view, its CAS number where known and a link back to this page. Free to use with the link kept.

<iframe src="https://www.compoundlist.com/embed/structure/4-chlorocatechol-2138-22-9" title="4-Chlorocatechol structure on CompoundList" width="360" height="420" style="border:1px solid #E7E2DA;border-radius:12px;max-width:100%" loading="lazy" referrerpolicy="strict-origin-when-cross-origin"></iframe>
Preview the embed

Explore more in Impurities and reference standards or HS code 290819

7 suppliers
Free quotes, contact stays private
Get quotes