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Esters and lactones

Methyl propiolate

Also known as Methyl propynoate, Propiolic acid, methyl ester, methyl propargylate

CAS 922-67-8Formula C4H4O2Molar mass 84.07 g/molEC 213-083-5
GHS signal word: Danger. Pictograms: Flammable, Harmful or irritant 13 suppliers listed
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Methyl propiolate chemical structure, C4H4O2, CAS 922-67-8
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
922-67-8
Formula
C4H4O2
Molar mass
84.07 g/mol
Physical form
Liquid
HS code
291619
Category
Esters and lactones
Illustrative photo, closed blue jerry cans in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is Methyl propiolate?

Plain description, key identifiers and synonyms

Methyl propiolate is a chemical substance with the molecular formula C4H4O2 and a molar mass of 84.07 g/mol. Its CAS registry number is 922-67-8. The IUPAC name is methyl prop-2-ynoate.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
methyl prop-2-ynoate
CAS number
922-67-8 CAS number cross-checkedOther or deprecated CAS: 27342-21-8, 7515-15-3
EC number
213-083-5
Molecular formula
C4H4O2
UNII
T88NXO102K
MDL number
MFCD00008572
InChIKey
IMAKHNTVDGLIRY-UHFFFAOYSA-N
InChI
InChI=1S/C4H4O2/c1-3-4(5)6-2/h1H,2H3
SMILES (canonical and isomeric)
COC(=O)C#C

Synonyms

  • Methyl propynoate
  • Propiolic acid, methyl ester
  • methyl propargylate
  • Propynoic acid methyl ester
  • methyl 2-propynoate
  • 4-02-00-01688 (Beilstein Handbook Reference)
  • methyl acetylenemonocarboxylate
  • (Carbomethoxy)acetylene
  • (Methoxycarbonyl)acetylene
  • methyl prop-2-ynoate
  • Methyl acetylenecarboxylate
  • 2-Propynoic acid, methyl ester
  • Methyl ethynecarboxylate
  • Propiolic Acid Methyl Ester
  • Propynoic acid, methyl ester
  • Acetylenecarboxylic acid methyl ester
  • Methylpropiolate
  • Propargylic Acid Methyl Ester
  • propiolic acid methy
  • Methyl propiolate, 99%
  • propiolic acid methylester
  • doi:10.14272/IMAKHNTVDGLIRY-UHFFFAOYSA-N.1

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.

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
84.07 g/molcalc.
Exact mass
84.0211 Dacalc.
LogP (octanol/water)
-0.21calc.
Topological polar surface area
26.3 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
0calc.
Heavy atoms
6calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0.25calc.
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
GHS07: Harmful or irritant
Harmful or irritant

Hazard statements

  • H225Highly flammable liquid and vapour.
  • H315Causes skin irritation.
  • H319Causes serious eye irritation.
  • H335May cause respiratory irritation.
Precautionary statements (25)
  • 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.
  • 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.
  • 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.
  • 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.
  • P370 + P378In case of fire: Use appropriate media to extinguish.
  • 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.

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

Methyl propiolate suppliers

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

All 13 suppliers
13 of 13 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

13 suppliers in 7 countries

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Methyl propiolate 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

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 Methyl propiolate is traded under.

HS 2916.19Indicative HS code

Unsaturated acyclic monocarboxylic acids, their anhydrides, halides, peroxides…

World exports in 2024
$674M
−9.6% vs 2023, imports $722M
2019 to 2024
Top exporters
  1. China44.5%
  2. Germany15.3%
  3. India * partner reported11.5%
Top importers
  1. United States17.1%
  2. Netherlands7.8%
  3. South Korea7.0%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

Quick answers about Methyl propiolate, based on the data on this page

What is Methyl propiolate?

Methyl propiolate is a chemical substance with the molecular formula C4H4O2 and a molar mass of 84.07 g/mol. Its CAS registry number is 922-67-8. The IUPAC name is methyl prop-2-ynoate.

What is the CAS number of Methyl propiolate?

The CAS registry number of Methyl propiolate is 922-67-8. Other or deprecated CAS numbers: 27342-21-8, 7515-15-3.

What is the molecular formula and weight of Methyl propiolate?

The molecular formula of Methyl propiolate is C4H4O2 and its molar mass is 84.07 g/mol.

What is Methyl propiolate used for?

Known uses and roles of Methyl propiolate include building blocks in research and laboratory.

Is Methyl propiolate hazardous?

Methyl propiolate carries the GHS signal word "Danger". Main hazards: highly flammable liquid and vapour, causes skin irritation, causes serious eye irritation. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Methyl propiolate?

Methyl propiolate is usually classified under HS code 291619 (Unsaturated acyclic monocarboxylic acids, their anhydrides, halides, peroxides…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Methyl propiolate?

CompoundList lists 13 suppliers of Methyl propiolate in China, United States, Canada, United Kingdom and 3 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Methyl propiolate?

Suppliers quote Methyl propiolate 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 Methyl propiolate

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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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