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Heterocyclic compounds

Isoxazoline

Also known as 4,5-Dihydroisoxazole, Isoxazole, 4,5-dihydro-, isoxazolines

CAS 504-73-4Formula C3H5NOMolar mass 71.08 g/mol
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Isoxazoline chemical structure, C3H5NO, CAS 504-73-4
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
504-73-4
Formula
C3H5NO
Molar mass
71.08 g/mol
HS code
293499
Category
Heterocyclic compounds

What is Isoxazoline?

Plain description, key identifiers and synonyms

Isoxazoline is a chemical substance with the molecular formula C3H5NO and a molar mass of 71.08 g/mol. Its CAS registry number is 504-73-4. The IUPAC name is 4,5-dihydro-1,2-oxazole.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
4,5-dihydro-1,2-oxazole
CAS number
504-73-4 CAS number cross-checked
Molecular formula
C3H5NO
UNII
NBB8G944P3
InChIKey
WEQPBCSPRXFQQS-UHFFFAOYSA-N
InChI
InChI=1S/C3H5NO/c1-2-4-5-3-1/h2H,1,3H2
SMILES (canonical and isomeric)
C1CON=C1

Synonyms

  • 4,5-Dihydroisoxazole
  • Isoxazole, 4,5-dihydro-
  • isoxazolines
  • dihydroisoxazoles
  • dihydroisoxazole
  • 4,5-dihydro-1,2-oxazole
  • 2-Isoxazoline

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
71.08 g/molcalc.
Exact mass
71.0371 Dacalc.
LogP (octanol/water)
0.39calc.
Topological polar surface area
21.59 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
0calc.
Heavy atoms
5calc.
Rings
1calc.
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.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, C1=NOCC1

C1=NOCC1

1 ring, 5 atoms. This chemical is the scaffold itself.

360 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

No GHS hazard classification is recorded for this substance yet. That does not mean it is harmless.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Isoxazoline suppliers

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

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Isoxazoline 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

Applications are not documented for this substance yet. Suppliers often describe uses on their product pages, linked in the suppliers list above.

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

Frequently asked questions

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

What is Isoxazoline?

Isoxazoline is a chemical substance with the molecular formula C3H5NO and a molar mass of 71.08 g/mol. Its CAS registry number is 504-73-4. The IUPAC name is 4,5-dihydro-1,2-oxazole.

What is the CAS number of Isoxazoline?

The CAS registry number of Isoxazoline is 504-73-4.

What is the molecular formula and weight of Isoxazoline?

The molecular formula of Isoxazoline is C3H5NO and its molar mass is 71.08 g/mol.

Is Isoxazoline hazardous?

No GHS hazard classification for Isoxazoline is recorded on CompoundList yet. That does not prove it is safe. Always read the supplier safety data sheet.

What is the HS code of Isoxazoline?

Isoxazoline 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 Isoxazoline?

Post a free request on CompoundList and suppliers of Isoxazoline will send you quotes. Your contact details stay private until you accept a quote.

What is the price of Isoxazoline?

Suppliers quote Isoxazoline 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 Isoxazoline

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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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