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Heterocyclic building blocks

Azlactone

Also known as 2-Phenyloxazol-5(4H)-one, 5(4H)-Oxazolone, 2-phenyl-, 2-Phenyloxazolone

CAS 1199-01-5Formula C9H7NO2Molar mass 161.16 g/molEC 214-840-2
GHS signal word: Warning. Pictograms: Harmful or irritant 10 suppliers listed
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Azlactone chemical structure, C9H7NO2, CAS 1199-01-5
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
1199-01-5
Formula
C9H7NO2
Molar mass
161.16 g/mol
EC number
214-840-2
HS code
293499
Category
Heterocyclic building blocks

What is Azlactone?

Plain description, key identifiers and synonyms

2-phenyloxazol-5(4H)-one is a 1,3-oxazole having a phenyl substituent at the 2-position and an oxo group at the 5-position. Note that phenyloxazolone is commonly used as a synonym for 4-(ethoxymethylene)-2-phenyloxazol-5-one (PhOx).

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
2-phenyl-4H-1,3-oxazol-5-one
CAS number
1199-01-5 CAS number cross-checked
EC number
214-840-2
Molecular formula
C9H7NO2
UNII
2ZE8X9UTS8
MDL number
MFCD00014517
InChIKey
QKCKCXFWENOGER-UHFFFAOYSA-N
InChI
InChI=1S/C9H7NO2/c11-8-6-10-9(12-8)7-4-2-1-3-5-7/h1-5H,6H2
SMILES (canonical and isomeric)
C1C(=O)OC(=N1)C2=CC=CC=C2

Synonyms

  • 2-Phenyloxazol-5(4H)-one
  • 5(4H)-Oxazolone, 2-phenyl-
  • 2-Phenyloxazolone
  • 2-Phenyloxazolin-5-one
  • 2-phenyl-1,3-oxazol-5(4H)-one
  • 2-phenyloxazol-5-one
  • 2-Phenyl-5-oxazolone
  • Phenyloxazolone
  • 2-phenyl-4H-oxazol-5-one
  • 2-Phenyl-5(4H)-Oxazolone
  • 2-phenyl-4H-1,3-oxazol-5-one
  • 2-Oxazolin-5-one, 2-phenyl-
  • 2-phenyl-1,3-oxazolin-5-one
  • 2-phenyl-2-oxazolin-5-one
  • 2-phenyl-4,5-dihydro-1,3-oxazol-5-one

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
161.16 g/molcalc.
Exact mass
161.0477 Dacalc.
LogP (octanol/water)
0.99calc.
Topological polar surface area
38.66 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
3calc.
Rotatable bonds
1calc.
Heavy atoms
12calc.
Rings
2calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0.11calc.
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, O=C1CN=C(c2ccccc2)O1

O=C1CN=C(c2ccccc2)O1

2 rings, 12 atoms. This chemical is the scaffold itself.

59 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

  • H302Harmful if swallowed.
Precautionary statements (5)
  • P264Wash skin thoroughly after handling.
  • P270Do not eat, drink or smoke when using this product.
  • P301 + P317If swallowed: Get medical help.
  • P330Rinse mouth.
  • 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

Azlactone suppliers

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

All 10 suppliers
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Where suppliers are based

10 suppliers in 3 countries

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Azlactone price

Indicative price range per kg from live supplier offers

No published prices right now

Suppliers quote this chemical on request. Send one free request and compare quotes side by side.

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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

United States

  • TSCA inventory (USA)
    Status: Inactive 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 Azlactone 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 Azlactone is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

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

What is Azlactone?

2-phenyloxazol-5(4H)-one is a 1,3-oxazole having a phenyl substituent at the 2-position and an oxo group at the 5-position. Note that phenyloxazolone is commonly used as a synonym for 4-(ethoxymethylene)-2-phenyloxazol-5-one (PhOx).

What is the CAS number of Azlactone?

The CAS registry number of Azlactone is 1199-01-5.

What is the molecular formula and weight of Azlactone?

The molecular formula of Azlactone is C9H7NO2 and its molar mass is 161.16 g/mol.

What is Azlactone used for?

Known uses and roles of Azlactone include building blocks in research and laboratory and screening compounds in research and laboratory.

Is Azlactone hazardous?

Azlactone carries the GHS signal word "Warning". Main hazards: harmful if swallowed. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Azlactone?

Azlactone 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 Azlactone?

CompoundList lists 10 suppliers of Azlactone in China, United States and Ukraine. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Azlactone?

Suppliers quote Azlactone 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 Azlactone

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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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