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Impurities and reference standards

4-Chlorobenzophenone

Also known as p-Chlorobenzophenone, Methanone, (4-chlorophenyl)phenyl-, p-CBP

CAS 134-85-0Formula C13H9ClOMolar mass 216.67 g/molEC 205-160-7
GHS signal word: Warning. Pictograms: Hazardous to the environment 38 suppliers listed
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4-Chlorobenzophenone chemical structure, C13H9ClO, CAS 134-85-0
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Needles from alcohol
Melting point
78 °C
Boiling point
332 °C
Solubility
Soluble in ethanol, ether, and acetone, slightly soluble in carbon tetrachloride
HS code
291479
Category
Impurities and reference standards
Illustrative photo, closed white HDPE bottles and amber jars on a laboratory bench
Typical packagingIllustrative packaging image, not the actual product

What is 4-Chlorobenzophenone?

Plain description, key identifiers and synonyms

4-chlorobenzophenone is a member of benzophenones.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
(4-chlorophenyl)-phenylmethanone
CAS number
134-85-0 CAS number cross-checked
EC number
205-160-7
Molecular formula
C13H9ClO
UNII
WIH1IZ728U
MDL number
MFCD00000622
InChIKey
UGVRJVHOJNYEHR-UHFFFAOYSA-N
InChI
InChI=1S/C13H9ClO/c14-12-8-6-11(7-9-12)13(15)10-4-2-1-3-5-10/h1-9H
SMILES (canonical and isomeric)
C1=CC=C(C=C1)C(=O)C2=CC=C(C=C2)Cl

Synonyms

  • p-Chlorobenzophenone
  • Methanone, (4-chlorophenyl)phenyl-
  • p-CBP
  • Benzophenone, 4-chloro-
  • (4-chlorophenyl)phenylmethanone
  • 4-chlorophenyl phenyl ketone
  • para-Chlorobenzophenone
  • 4-Benzoylphenyl chloride
  • p-Chlorophenyl phenyl ketone
  • Clemastine (m2)
  • Phenyl 4-chlorophenyl ketone
  • 4-Chlorophenyl-phenyl methanone
  • Meclozine dihydrochloride impurity c
  • 4-Chlorobenzophenone (usp-rs)
  • Meclozine dihydrochloride impurity c (ep impurity)
  • pChlorobenzophenone
  • paraChlorobenzophenone
  • Benzophenone, 4chloro
  • Benzophenone, 4-chloro-(8CI)
  • Methanone, (4chlorophenyl)phenyl
  • (4-Chlorophenyl)(phenyl)methanone
  • (4-chlorophenyl)-phenylmethanone
  • Cetirizine Impurity (4-Chlorobenzophenone)
  • 4-chloro benzophenone
  • Meclozine EP Impurity C
Show all 32 synonyms
  • (4-chlorophenyl)-phenyl-methanone
  • 4-Chlorobenzophenone, 99%
  • phenyl-(4-chlorophenyl)-ketone
  • Meclozine Dihydrochloride EP Impurity C
  • 4-Chlorobenzophenone(Chunks or pellets or flake)
  • 4-Chlorobenzophenone, United States Pharmacopeia (USP) Reference Standard
  • Cetirizine 4-Chlorobenzophenone Impurity (Usp), Meclozine EP Impurity C

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 alcoholexp.
Melting point
78 °Cexp.
Boiling point
332 °Cexp.
Solubility
Soluble in ethanol, ether, and acetone, slightly soluble in carbon tetrachlorideexp.

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
216.67 g/molcalc.
Exact mass
216.0342 Dacalc.
LogP (octanol/water)
3.57calc.
Topological polar surface area
17.07 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
1calc.
Rotatable bonds
2calc.
Heavy atoms
15calc.
Rings
2calc.
Aromatic rings
2calc.
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, O=C(c1ccccc1)c1ccccc1

O=C(c1ccccc1)c1ccccc1

2 rings, 14 atoms, the Benzophenone ring system.

5,108 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Warning
GHS09: Hazardous to the environment
Hazardous to the environment

Hazard statements

  • H400Very toxic to aquatic life.
  • H410Very toxic to aquatic life with long lasting effects.
Precautionary statements (3)
  • P273Avoid release to the environment.
  • P391Collect spillage.
  • 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-Chlorobenzophenone suppliers

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

All 38 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

38 suppliers in 6 countries

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4-Chlorobenzophenone 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

Intermediate.

Use classes: Antihistamines.

How it is made

4-Chlorobenzophenone is routinely prepared by employing 4-chlorobenzoyl chloride and benzene with AlCl3 as catalyst.

Regulatory status

Inventories, regulations and trade controls that list this substance

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 4-Chlorobenzophenone is traded under.

HS 2914.79Indicative HS code

Halogenated, sulphonated, nitrated or nitrosated derivatives, other

World exports in 2024
$558M
−12.1% vs 2023, imports $608M
2019 to 2024
Top exporters
  1. China41.2%
  2. India * partner reported28.7%
  3. Germany16.7%
Top importers
  1. United States29.1%
  2. Italy9.9%
  3. Switzerland * partner reported8.8%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

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

What is 4-Chlorobenzophenone?

4-chlorobenzophenone is a member of benzophenones.

What is the CAS number of 4-Chlorobenzophenone?

The CAS registry number of 4-Chlorobenzophenone is 134-85-0.

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

The molecular formula of 4-Chlorobenzophenone is C13H9ClO and its molar mass is 216.67 g/mol.

What is 4-Chlorobenzophenone used for?

Intermediate. Use classes: Antihistamines.

Is 4-Chlorobenzophenone hazardous?

4-Chlorobenzophenone carries the GHS signal word "Warning". Main hazards: very toxic to aquatic life, very toxic to aquatic life with long lasting effects. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of 4-Chlorobenzophenone?

4-Chlorobenzophenone is usually classified under HS code 291479 (Halogenated, sulphonated, nitrated or nitrosated derivatives, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy 4-Chlorobenzophenone?

CompoundList lists 38 suppliers of 4-Chlorobenzophenone in India, China, United States, Netherlands 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 4-Chlorobenzophenone in India?

14 suppliers in India list 4-Chlorobenzophenone on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of 4-Chlorobenzophenone?

Suppliers quote 4-Chlorobenzophenone 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-Chlorobenzophenone

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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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