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Heterocyclic building blocks

Thiophene oxide

Also known as thiophene 1-oxide, lambda(4)-thiophen-1-one, Thiophenone

CAS 159159-41-8Formula C4H4OSMolar mass 100.14 g/mol
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Thiophene oxide chemical structure, C4H4OS, CAS 159159-41-8
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
159159-41-8
Formula
C4H4OS
Molar mass
100.14 g/mol
HS code
293499
Category
Heterocyclic building blocks

What is Thiophene oxide?

Plain description, key identifiers and synonyms

Thiophene oxide is a cyclic heterone that is thiophene carrying an oxo group at position 1. It is functionally related to a thiophene.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
thiophene 1-oxide
CAS number
159159-41-8 CAS number cross-checkedOther or deprecated CAS: 2657-73-0
Molecular formula
C4H4OS
InChIKey
LWRYDHOHXNQTSK-UHFFFAOYSA-N
InChI
InChI=1S/C4H4OS/c5-6-3-1-2-4-6/h1-4H
SMILES (canonical and isomeric)
C1=CS(=O)C=C1

Synonyms

  • thiophene 1-oxide
  • lambda(4)-thiophen-1-one
  • Thiophenone
  • thienone
  • thiolone
  • thiophen 1-oxid
  • 1H-1lambda~4~-Thiophen-1-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
100.14 g/molcalc.
Exact mass
99.9983 Dacalc.
LogP (octanol/water)
0.78calc.
Topological polar surface area
17.07 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
1calc.
Rotatable bonds
0calc.
Heavy atoms
6calc.
Rings
1calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0calc.
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=S1C=CC=C1

O=S1C=CC=C1

1 ring, 6 atoms. This chemical is the scaffold itself.

5 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.

Thiophene oxide suppliers

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

Frequently asked questions

Quick answers about Thiophene oxide, based on the data on this page

What is Thiophene oxide?

Thiophene oxide is a cyclic heterone that is thiophene carrying an oxo group at position 1. It is functionally related to a thiophene.

What is the CAS number of Thiophene oxide?

The CAS registry number of Thiophene oxide is 159159-41-8. Other or deprecated CAS numbers: 2657-73-0.

What is the molecular formula and weight of Thiophene oxide?

The molecular formula of Thiophene oxide is C4H4OS and its molar mass is 100.14 g/mol.

What is Thiophene oxide used for?

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

Is Thiophene oxide hazardous?

No GHS hazard classification for Thiophene oxide 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 Thiophene oxide?

Thiophene oxide 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 Thiophene oxide?

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

What is the price of Thiophene oxide?

Suppliers quote Thiophene oxide 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 Thiophene oxide

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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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