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Heterocyclic building blocks

Oxazolone

Also known as 5(4H)-Oxazolone, 4-(ethoxymethylene)-2-phenyl-, 4-Ethoxymethylene-2-phenyloxazolone, 2-Phenyl-4-(ethoxymethylene)oxazol-5-one

CAS 15646-46-5Formula C12H11NO3Molar mass 217.22 g/molEC 239-713-9
GHS signal word: Warning. Pictograms: Harmful or irritant 5 suppliers listed
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Oxazolone chemical structure, C12H11NO3, CAS 15646-46-5
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
15646-46-5
Formula
C12H11NO3
Molar mass
217.22 g/mol
EC number
239-713-9
HS code
293499
Category
Heterocyclic building blocks

What is Oxazolone?

Plain description, key identifiers and synonyms

Oxazolone is a chemical substance with the molecular formula C12H11NO3 and a molar mass of 217.22 g/mol. Its CAS registry number is 15646-46-5. The IUPAC name is (4Z)-4-(ethoxymethylidene)-2-phenyl-1,3-oxazol-5-one.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
(4Z)-4-(ethoxymethylidene)-2-phenyl-1,3-oxazol-5-one
CAS number
15646-46-5 CAS number cross-checkedOther or deprecated CAS: 60777-96-0
EC number
239-713-9
Molecular formula
C12H11NO3
UNII
78IL0J7N72
MDL number
MFCD00003204
InChIKey
SJHPCNCNNSSLPL-NTMALXAHSA-N
InChI
InChI=1S/C12H11NO3/c1-2-15-8-10-12(14)16-11(13-10)9-6-4-3-5-7-9/h3-8H,2H2,1H3/b10-8-
Canonical SMILES
CCOC=C1N=C(c2ccccc2)OC1=O
Isomeric SMILES
CCO/C=C\1/C(=O)OC(=N1)C2=CC=CC=C2

Synonyms

  • 5(4H)-Oxazolone, 4-(ethoxymethylene)-2-phenyl-
  • 4-Ethoxymethylene-2-phenyloxazolone
  • 2-Phenyl-4-(ethoxymethylene)oxazol-5-one
  • 4 Ethoxymethylene 2 phenyloxazolone
  • 4-Ethoxymethylene-2-phenyl-5-oxazolone
  • 4-Ethoxymethylene-2-phenyl-2-oxazolin-5-one
  • Oxazolone (sensitizing agent)
  • (4Z)-4-(ethoxymethylidene)-2-phenyl-1,3-oxazol-5-one
  • 4-Ethoxymethylene-2-phenyloxazolin-5-one
  • 5(4H)-Oxazolone, 4-(ethoxymethylene)-2-phenyl-, (4Z)-
  • 4-Ethoxymethylene-2-phenyl-5-oxazolone, (4Z)-
  • (Z)-4-(ethoxymethylene)-2-phenyloxazol-5(4H)-one
  • 5(4H)-Oxazolone, 4-(ethoxymethylene)-2-phenyl-, (Z)-
  • 4-Ethoxymethylene-2-phenyl-2-oxazoline-5-one
  • 4-(ethoxymethylene)-2-phenyl-1,3-oxazolin-5-one
  • 2-Oxazolin-5-one, 4-(ethoxymethylene)-2-phenyl-
  • 2-Oxazolin-5-one, 4-ethoxymethylene-2-phenyl-
  • 4-Ethoxymethylene-2-phenyl oxazolone
  • 2-Phenyl-4-(ethoxymethylene)oxazolone
  • 4-Ethoxymethylene-2-phenyloxazol-5-one
  • (4Z)-4-ethoxymethylene-2-phenyl-5-oxazolone
  • (4Z)-4-(ethoxymethylene)-2-phenyl-oxazol-5-one
  • 4-(Ethoxymethylene)-2-phenyl-1,3-oxazol-5(4H)-one #
  • 4-Ethoxymethylene-2-phenyl-2-oxazolin-5-one, technical grade
  • 4-Ethoxymethylene-2-phenyl-2-oxazolin-5-one, purified by recrystallization
Show all 26 synonyms
  • 4-Ethoxymethylene-2-phenyl-2-oxazolin-5-one, analytical standard, for drug analysis

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

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

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
217.22 g/molcalc.
Exact mass
217.0739 Dacalc.
LogP (octanol/water)
1.87calc.
Topological polar surface area
47.89 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
4calc.
Rotatable bonds
3calc.
Heavy atoms
16calc.
Rings
2calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0.17calc.
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, C=C1N=C(c2ccccc2)OC1=O

C=C1N=C(c2ccccc2)OC1=O

2 rings, 13 atoms.

52 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

  • H317May cause an allergic skin reaction.
Precautionary statements (8)
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P272Contaminated work clothing should not be allowed out of the workplace.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P302 + P352If on skin: Wash with plenty of water.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P333 + P317If skin irritation or rash occurs: Get medical help.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • 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

Oxazolone suppliers

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

All 5 suppliers
5 of 5 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

5 suppliers in 4 countries

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Oxazolone 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

Pharmacological actions

  • Adjuvants, Immunologic

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 Oxazolone is traded under.

HS 2934.99Indicative HS code

Nucleic acids and their salts, other heterocyclic compounds, not elsewhere classified in heading 2934

World exports in 2024
$26.7B
+15.0% vs 2023, imports $26.3B
2019 to 2024
Top exporters
  1. Ireland26.3%
  2. China15.7%
  3. Singapore10.3%
Top importers
  1. United States24.5%
  2. Germany23.1%
  3. Japan4.5%
Reported customs values in USD, not prices.Full trade data

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

Frequently asked questions

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

What is Oxazolone?

Oxazolone is a chemical substance with the molecular formula C12H11NO3 and a molar mass of 217.22 g/mol. Its CAS registry number is 15646-46-5. The IUPAC name is (4Z)-4-(ethoxymethylidene)-2-phenyl-1,3-oxazol-5-one.

What is the CAS number of Oxazolone?

The CAS registry number of Oxazolone is 15646-46-5. Other or deprecated CAS numbers: 60777-96-0.

What is the molecular formula and weight of Oxazolone?

The molecular formula of Oxazolone is C12H11NO3 and its molar mass is 217.22 g/mol.

What is Oxazolone used for?

Known uses and roles of Oxazolone include building blocks in research and laboratory, screening compounds in research and laboratory and adjuvants, immunologic.

Is Oxazolone hazardous?

Oxazolone carries the GHS signal word "Warning". Main hazards: may cause an allergic skin reaction. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Oxazolone?

Oxazolone is usually classified under HS code 293499 (Nucleic acids and their salts, whether or not chemically defined, other heterocyclic…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Oxazolone?

CompoundList lists 5 suppliers of Oxazolone in China, France, Ukraine and United States. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Oxazolone?

Suppliers quote Oxazolone 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 Oxazolone

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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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