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Heterocyclic building blocks

4-Acetylpyridine

Also known as 1-pyridin-4-ylethanone, Methyl 4-pyridyl ketone, Ethanone, 1-(4-pyridinyl)-

CAS 1122-54-9Formula C7H7NOMolar mass 121.14 g/molEC 214-350-9
GHS signal word: Warning. Pictograms: Harmful or irritant 25 suppliers listed
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4-Acetylpyridine chemical structure, C7H7NO, CAS 1122-54-9
2D chemical structure

Key facts

What buyers check first

All properties
Physical form
Liquid
Boiling point
212.2 °C
Density
1.111 at 74.1 °F - Denser than water, will sink
Flash point
>93.3
Solubility
Greater than or equal to 100 mg/mL at 66 °F
HS code
293339
Category
Heterocyclic building blocks
UN number
UN 2810
Illustrative photo, 200 litre steel drums of liquid in a chemical plant
Typical packagingIllustrative packaging image, not the actual product

What is 4-Acetylpyridine?

Plain description, key identifiers and synonyms

4-acetylpyridine is a dark amber liquid. (NTP, 1992)

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
1-pyridin-4-ylethanone
CAS number
1122-54-9 CAS number cross-checked
EC number
214-350-9
Molecular formula
C7H7NO
UNII
G47437IOW7
MDL number
MFCD00006433
InChIKey
WMQUKDQWMMOHSA-UHFFFAOYSA-N
InChI
InChI=1S/C7H7NO/c1-6(9)7-2-4-8-5-3-7/h2-5H,1H3
SMILES (canonical and isomeric)
CC(=O)C1=CC=NC=C1

Synonyms

  • 1-pyridin-4-ylethanone
  • Methyl 4-pyridyl ketone
  • Ethanone, 1-(4-pyridinyl)-
  • Ketone, methyl 4-pyridyl
  • Pyridine, 4-acetyl-
  • 4-Pyridyl methyl ketone
  • 1-(4-Pyridinyl)ethanone
  • 1-(pyridin-4-yl)ethan-1-one
  • 4-Acetyl pyridine
  • 1-(pyridin-4-yl)ethanone
  • 1-(4-pyridyl)ethanone
  • 1-Pyridin-4-yl-ethanone
  • 4-Acetylpyridine, Vetec(TM) reagent grade, 97%
  • 4-Acetyl-pyridine
  • gamma-Acetylpyridine
  • 4-Acetylpyridine, 97%
  • Pyridine,4-acetyl
  • 1-(pyridin-4-yl)-ethanone
  • 1-(4-Pyridinyl)ethanone #
  • Acetyl pyridine, 4-
  • 5-21-07-00400 (Beilstein Handbook Reference)
  • Methyl 4-pyridylketone

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

Physical form
Liquidexp.
Boiling point
212.2 °Cexp.
Density
1.111 at 74.1 °F - Denser than water, will sinkexp.
Flash point
>93.3exp.
Solubility
Greater than or equal to 100 mg/mL at 66 °Fexp.
Vapour pressure
4.9 mmHg at 77 °F, 6.1 mmHg at 94.1 °Fexp.

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
121.14 g/molcalc.
Exact mass
121.0528 Dacalc.
LogP (octanol/water)
1.28calc.
Topological polar surface area
29.96 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
1calc.
Heavy atoms
9calc.
Rings
1calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0.14calc.
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, c1ccncc1

c1ccncc1

1 ring, 6 atoms, the Pyridine ring system.

118,162 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

Hazard statements

  • H315Causes skin irritation.
  • H319Causes serious eye irritation.
  • H335May cause respiratory irritation.
Precautionary statements (16)
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P271Use only outdoors or in a well-ventilated area.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • 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.
  • P319Get medical help if you feel unwell.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • 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.
UN number
UN 2810

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-Acetylpyridine suppliers

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All 25 suppliers
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Where suppliers are based

25 suppliers in 8 countries

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4-Acetylpyridine 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

Functional uses

  • Flavouring and nutrient

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-Acetylpyridine is traded under.

HS 2933.39Indicative HS code

Heterocyclic compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure…

World exports in 2024
$9.16B
−17.9% vs 2023, imports $10.6B
2019 to 2024
Top exporters
  1. China21.5%
  2. India * partner reported12.3%
  3. Ireland11.6%
Top importers
  1. Germany14.2%
  2. United States12.8%
  3. Brazil10.1%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

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

What is 4-Acetylpyridine?

4-acetylpyridine is a dark amber liquid. (NTP, 1992)

What is the CAS number of 4-Acetylpyridine?

The CAS registry number of 4-Acetylpyridine is 1122-54-9.

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

The molecular formula of 4-Acetylpyridine is C7H7NO and its molar mass is 121.14 g/mol.

What is 4-Acetylpyridine used for?

Known uses and roles of 4-Acetylpyridine include building blocks in research and laboratory, screening compounds in research and laboratory and flavouring and nutrient.

Is 4-Acetylpyridine hazardous?

4-Acetylpyridine carries the GHS signal word "Warning". Main hazards: causes skin irritation, causes serious eye irritation, may cause respiratory irritation. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of 4-Acetylpyridine?

4-Acetylpyridine is usually classified under HS code 293339 (Compounds containing an unfused pyridine ring (whether or not hydrogenated) in the…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy 4-Acetylpyridine?

CompoundList lists 25 suppliers of 4-Acetylpyridine in China, United States, India, Canada 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 4-Acetylpyridine in India?

5 suppliers in India list 4-Acetylpyridine 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-Acetylpyridine?

Suppliers quote 4-Acetylpyridine 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-Acetylpyridine

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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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