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Impurities and reference standards

P-Chloroacetophenone

Also known as 4'-Chloroacetophenone, 1-(4-Chlorophenyl)ethanone, 4-Chloroacetophenone

CAS 99-91-2Formula C8H7ClOMolar mass 154.60 g/molEC 202-800-7
GHS signal word: Danger. Pictograms: Corrosive, Acute toxicity (severe), Harmful or irritant 18 suppliers listed
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P-Chloroacetophenone chemical structure, C8H7ClO, CAS 99-91-2
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Liquid
Melting point
20 to 21
Boiling point
237 °C
Density
1.1922 @ 20 °C/4 °C
Solubility
PRACTICALLY INSOL IN WATER, MISCIBLE WITH ALC, ETHER
HS code
291479
Category
Impurities and reference standards
Illustrative photo, assorted laboratory chemical bottles and jars on a laboratory bench
Typical packagingIllustrative packaging image, not the actual product

What is P-Chloroacetophenone?

Plain description, key identifiers and synonyms

P-chloroacetophenone is an organic molecular entity.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
1-(4-chlorophenyl)ethanone
CAS number
99-91-2 CAS number cross-checkedOther or deprecated CAS: 238399-91-2
EC number
202-800-7
Molecular formula
C8H7ClO
UNII
ZV4A71K303
MDL number
MFCD00000624
InChIKey
BUZYGTVTZYSBCU-UHFFFAOYSA-N
InChI
InChI=1S/C8H7ClO/c1-6(10)7-2-4-8(9)5-3-7/h2-5H,1H3
SMILES (canonical and isomeric)
CC(=O)C1=CC=C(C=C1)Cl

Synonyms

  • 4'-Chloroacetophenone
  • 1-(4-Chlorophenyl)ethanone
  • 4-Chloroacetophenone
  • Ethanone, 1-(4-chlorophenyl)-
  • 1-(4-Chlorophenyl)Ethan-1-One
  • USAF DO-1
  • 1-(4-Chlorophenyl)-ethanone
  • Methyl p-chlorophenyl ketone
  • p-Chlorophenyl methyl ketone
  • 4-Acetylchlorobenzene
  • Acetophenone, 4'-chloro-
  • p-Chloracetophenone
  • p-Acetylchlorobenzene
  • Methyl 4-chlorophenyl ketone
  • 4-Chlorophenyl methyl ketone
  • 1-acetyl-4-chlorobenzene
  • p-choroacetophenone
  • 4-chloracetophenone
  • p-chloro-acetophenone
  • 4-chloro acetophenone
  • 4-chloroace-tophenone
  • 4`-Chloroacetophenone
  • 4\'-Chloroacetophenone
  • acetophenone, p-chloro-
  • Benzonatate Impurity 25
Show all 32 synonyms
  • 4-07-00-00639 (Beilstein Handbook Reference)
  • 4'-Chloroacetophenone, 97%
  • 1-(4-chloro-phenyl)-ethanone
  • 1-(4-chlorophenyl)ethane-1-one
  • Acetophenone, 4'-chloro- (8CI)
  • 4 inverted exclamation marka-Chloroacetophenone
  • 4 inverted exclamation mark(R)-Chloroacetophenone

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
Liquidexp.
Melting point
20 to 21exp.
Boiling point
237 °Cexp.
Density
1.1922 @ 20 °C/4 °Cexp.
Solubility
PRACTICALLY INSOL IN WATER, MISCIBLE WITH ALC, ETHERexp.

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
154.60 g/molcalc.
Exact mass
154.0185 Dacalc.
LogP (octanol/water)
2.54calc.
Topological polar surface area
17.07 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
1calc.
Rotatable bonds
1calc.
Heavy atoms
10calc.
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
GHS06: Acute toxicity (severe)
Acute toxicity (severe)
GHS07: Harmful or irritant
Harmful or irritant

Hazard statements

  • H302Harmful if swallowed.
  • H315Causes skin irritation.
  • H318Causes serious eye damage.
  • H319Causes serious eye irritation.
  • H330Fatal if inhaled.
  • H335May cause respiratory irritation.
  • H412Harmful to aquatic life with long lasting effects.
Precautionary statements (26)
  • P260Do not breathe dust, fume, gas, mist, vapours or spray.
  • 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.
  • P273Avoid release to the environment.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P284In case of inadequate ventilation wear respiratory 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 + P351 + P338If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • 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.
  • P317Get medical help.
  • P319Get medical help if you feel unwell.
  • P320Specific treatment is urgent (see supplemental first aid instructions on the label).
  • 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.
  • P403 + P233Store in a well-ventilated place. Keep container tightly closed.
  • 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

P-Chloroacetophenone suppliers

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

All 18 suppliers
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Where suppliers are based

18 suppliers in 4 countries

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P-Chloroacetophenone 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

Chemical intermediate for pharmaceuticals.

How it is made

Reaction of chlorobenzene and acetic anhydride catalyzed by aluminum chloride, and separation of isomers.

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 P-Chloroacetophenone 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 P-Chloroacetophenone is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about P-Chloroacetophenone, based on the data on this page

What is P-Chloroacetophenone?

P-chloroacetophenone is an organic molecular entity.

What is the CAS number of P-Chloroacetophenone?

The CAS registry number of P-Chloroacetophenone is 99-91-2. Other or deprecated CAS numbers: 238399-91-2.

What is the molecular formula and weight of P-Chloroacetophenone?

The molecular formula of P-Chloroacetophenone is C8H7ClO and its molar mass is 154.60 g/mol.

What is P-Chloroacetophenone used for?

Chemical intermediate for pharmaceuticals.

Is P-Chloroacetophenone hazardous?

P-Chloroacetophenone carries the GHS signal word "Danger". Main hazards: harmful if swallowed, causes skin irritation, causes serious eye damage. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of P-Chloroacetophenone?

P-Chloroacetophenone 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 P-Chloroacetophenone?

CompoundList lists 18 suppliers of P-Chloroacetophenone in India, United States, China and Canada. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy P-Chloroacetophenone in India?

7 suppliers in India list P-Chloroacetophenone on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of P-Chloroacetophenone?

Suppliers quote P-Chloroacetophenone 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 P-Chloroacetophenone

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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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