2-Thiophenecarboxaldehyde
Also known as: 2-Formylthiophene, 2-Thenaldehyde, 2-Thienylcarboxaldehyde, Thiophene-2-carbaldehyde, MFCD00005429, 2-Thiophenecarboxaldehyde (stabilized with HQ), THIOPHENE-2-CARBALDEHYDE FOR SYNTHESIS, formylthiophene
2-Thiophenecarboxaldehyde (CAS 98-03-3) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C5H4OS and a molecular weight of 112.150 g/mol. Key properties include a melting point of <10ºC, a boiling point of 198.0±13.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 77.8±0.0 °C. It is classified under GHS with signal word Warning and hazard statements H302 — Harmful if swallowed, H315 — Causes skin irritation and H319 — Causes serious eye irritation. No supplier offers are currently listed; request a quote. Record last updated Nov 3, 2026.
- CAS No.
- 98-03-3
- Jingsj CID
- J-45378-7
- Molecular Formula
- C5H4OS
- Molecular Weight
- 112.150 g/mol
- Category
- Pharma Intermediates
- Last updated
- 11/3/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | <10ºC |
|---|---|
| Boiling Point | 198.0±13.0 °C at 760 mmHg |
| Density | 1.2±0.1 g/cm3 |
| Flash Point | 77.8±0.0 °C |
| Exact Mass | 111.998283 |
| PSA | 45.31000 |
| LogP | 1.02 |
| Vapor Pressure | 0.4±0.4 mmHg at 25°C |
| Refractive Index | 1.610 |
| Additional Property | insoluble |
GHS Safety & Compliance
- H302 — Harmful if swallowed
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
Customs & Trade Information
| HS Code | 2934999090 |
|---|---|
| Summary | 2934999090. other heterocyclic compounds. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0% |
Frequently Asked Questions
What is the CAS number of 2-Thiophenecarboxaldehyde?
The CAS number of 2-Thiophenecarboxaldehyde is 98-03-3.
What are the molecular formula and molecular weight of 2-Thiophenecarboxaldehyde?
2-Thiophenecarboxaldehyde has molecular formula C5H4OS and molecular weight 112.150 g/mol.
Is 2-Thiophenecarboxaldehyde hazardous?
2-Thiophenecarboxaldehyde has GHS signal word Warning and hazard statements H302 — Harmful if swallowed; H315 — Causes skin irritation; H319 — Causes serious eye irritation.
What are the upstream and downstream products of 2-Thiophenecarboxaldehyde?
For 2-Thiophenecarboxaldehyde, Upstream Products: 2-Iodothiophene, 2-Thiophenecarbonyl chloride, Thiophene-2-carboxaldoxime; Downstream Products: 3,5-dimethyl-4-(thiophen-2-yl)isoxazole, 2-Mercapto-6-oxo-4-(thiophen-2-yl)-1,6-dihydropyrimidine-5-carbonitrile, 2-Methyl-3-nitrothiophene-5-carboxylic Acid.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "2-Thiophenecarboxaldehyde (CAS 98-03-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-45378-7 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.