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Pharmaceutical intermediates

Chloroacetone

Also known as 1-Chloropropan-2-one, 1-Chloroacetone, Monochloroacetone

CAS 78-95-5Formula C3H5ClOMolar mass 92.53 g/molEC 201-161-1
GHS signal word: Danger. Pictograms: Flammable, Acute toxicity (severe), Harmful or irritant, Hazardous to the environment 13 suppliers listed
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Chloroacetone chemical structure, C3H5ClO, CAS 78-95-5
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Liquid
Melting point
-44.5 °C
Boiling point
119 °C
Density
1.15 g/cm³ at 20 °C
Flash point
40 °C
HS code
291479
Category
Pharmaceutical intermediates
UN number
UN 1695
Illustrative photo, closed blue jerry cans in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is Chloroacetone?

Plain description, key identifiers and synonyms

Chloroacetone is an alpha-chloroketone. It is functionally related to an acetone.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
1-chloropropan-2-one
CAS number
78-95-5 CAS number cross-checked
EC number
201-161-1
Molecular formula
C3H5ClO
UNII
60ZTR74268
MDL number
MFCD00000936
InChIKey
BULLHNJGPPOUOX-UHFFFAOYSA-N
InChI
InChI=1S/C3H5ClO/c1-3(5)2-4/h2H2,1H3
SMILES (canonical and isomeric)
CC(=O)CCl

Synonyms

  • 1-Chloropropan-2-one
  • 1-Chloroacetone
  • Monochloroacetone
  • Chloropropanone
  • Acetonyl chloride
  • Chloro-2-propanone
  • 1-Chloro-2-propanone
  • Monochloracetone
  • Chloromethyl methyl ketone
  • Chloracetone
  • 3-Chloro-2-propanone
  • Acetone, chloro-
  • 2-Propanone, 1-chloro-
  • 1-Chloropropanone
  • Monochloropropanone
  • A-Stoff
  • alpha-Chloroacetone
  • 1-Chloro-2-ketopropane
  • 1-Chloro-2-oxopropane
  • methyl chloromethyl ketone
  • Tonite
  • 1-chloro-propan-2-one
  • Chloroacetone, stabilized
  • chloroactone
  • cloroacetone
Show all 36 synonyms
  • chloro acetone
  • chloro-acetone
  • chloro-propanone
  • isopropoyl chloride
  • 1-Chloroacetone #
  • isopropanoyl chloride
  • Chloroacetone, 95%
  • UN 1695
  • propanone, 1-chloro-
  • CH3COCH2Cl
  • Chloroacetone (unstabilized) [Forbidden]

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.
Odour
Pungent odorexp.
Melting point
-44.5 °Cexp.
Boiling point
119 °Cexp.
Density
1.15 g/cm³ at 20 °Cexp.
Flash point
40 °Cexp.
Autoignition temperature
610 °Cexp.
Solubility
Miscible with alcohol, ether and chloroform. Soluble in 10 parts water (wet weight)exp.
Vapour pressure
12.0 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
92.53 g/molcalc.
Exact mass
92.0029 Dacalc.
LogP (octanol/water)
0.81calc.
Topological polar surface area
17.07 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
1calc.
Rotatable bonds
1calc.
Heavy atoms
5calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0.67calc.
Formal charge
0calc.
Stereocentres
0calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Danger
GHS02: Flammable
Flammable
GHS06: Acute toxicity (severe)
Acute toxicity (severe)
GHS07: Harmful or irritant
Harmful or irritant
GHS09: Hazardous to the environment
Hazardous to the environment

Hazard statements

  • H226Flammable liquid and vapour.
  • H301Toxic if swallowed.
  • H310 + H330Fatal in contact with skin. Fatal if inhaled.
  • H310Fatal in contact with skin.
  • H311Toxic in contact with skin.
  • H315Causes skin irritation.
  • H319Causes serious eye irritation.
  • H330Fatal if inhaled.
  • H335May cause respiratory irritation.
  • H400Very toxic to aquatic life.
  • H410Very toxic to aquatic life with long lasting effects.
Precautionary statements (36)
  • P210Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
  • P233Keep container tightly closed.
  • P240Ground and bond container and receiving equipment.
  • P241Use explosion-proof electrical, ventilating and lighting equipment.
  • P242Use non-sparking tools.
  • P243Take action to prevent static discharges.
  • P260Do not breathe dust, fume, gas, mist, vapours or spray.
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P262Do not get in eyes, on skin, or on clothing.
  • 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 + P316If swallowed: Get emergency medical help immediately.
  • P302 + P352If on skin: Wash with plenty of water.
  • P303 + P361 + P353If on skin (or hair): Take off immediately all contaminated clothing. Rinse skin with water or shower.
  • 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.
  • P316Get emergency medical help immediately.
  • 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.
  • P361 + P364Take off immediately all contaminated clothing. And wash it before reuse.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • P370 + P378In case of fire: Use appropriate media to extinguish.
  • P391Collect spillage.
  • P403 + P233Store in a well-ventilated place. Keep container tightly closed.
  • P403 + P235Store in a well-ventilated place. Keep cool.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.
UN number
UN 1695
Transport hazard class
6.1
Packing group
I

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

Chloroacetone suppliers

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

All 13 suppliers
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Where suppliers are based

13 suppliers in 8 countries

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Chloroacetone 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

Has been proposed as tear gas component for police and military use, in the manufacture of couplers for color photography, as enzyme inactivator, intermediate in the manufacture of perfumes, antioxidants, drugs, in insecticide formulations, in photopolymerization of vinyl compounds. Proposed as catalyst in tetraethyl lead production, as selective solvent for separating diolefins.

Organic synthesis, tear gas (former use).

Monochloroacetone was introduced in 1914 as a war gas, and presently it has a number of uses as a chemical intermediate.

Chemical intermediate for chlorofluoroacetones.

Industrial uses: Intermediate.

How it is made

By action of chlorine upon diketene. By chlorination of acetone.

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

Frequently asked questions

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

What is Chloroacetone?

Chloroacetone is an alpha-chloroketone. It is functionally related to an acetone.

What is the CAS number of Chloroacetone?

The CAS registry number of Chloroacetone is 78-95-5.

What is the molecular formula and weight of Chloroacetone?

The molecular formula of Chloroacetone is C3H5ClO and its molar mass is 92.53 g/mol.

What is Chloroacetone used for?

Has been proposed as tear gas component for police and military use, in the manufacture of couplers for color photography, as enzyme inactivator, intermediate in the manufacture of perfumes, antioxidants, drugs, in insecticide formulations, in photopolymerization of vinyl compounds.

Is Chloroacetone hazardous?

Chloroacetone carries the GHS signal word "Danger". Main hazards: flammable liquid and vapour, toxic if swallowed, fatal in contact with skin. fatal if inhaled. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Chloroacetone?

Chloroacetone 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 Chloroacetone?

CompoundList lists 13 suppliers of Chloroacetone in China, United States, Czech Republic, Germany and 4 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Chloroacetone in India?

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

What is the price of Chloroacetone?

Suppliers quote Chloroacetone 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 Chloroacetone

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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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