4-Fluorophenylacetylene
Also known as: 1-Ethynyl-4-fluorobenzene, (p-Fluorophenyl)acetylene, 1-Ethynyl-4-fluorobenzene
4-Fluorophenylacetylene (CAS 766-98-3) is a compound in the Aromatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C8H5F and a molecular weight of 120.124 g/mol. Key properties include a melting point of 26-27 °C(lit.), a boiling point of 138.6±23.0 °C at 760 mmHg, a density of 1.1±0.1 g/cm3 and a flash point of 24.3±15.7 °C. It is classified under GHS with signal word Danger and hazard statements H228, H315 — Causes skin irritation and H319 — Causes serious eye irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 766-98-3
- Jingsj CID
- J-9422-4
- Molecular Formula
- C8H5F
- Molecular Weight
- 120.124 g/mol
- Category
- Aromatic Hydrocarbons
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 26-27 °C(lit.) |
|---|---|
| Boiling Point | 138.6±23.0 °C at 760 mmHg |
| Density | 1.1±0.1 g/cm3 |
| Flash Point | 24.3±15.7 °C |
| Exact Mass | 120.037529 |
| LogP | 2.45 |
| Vapor Pressure | 8.3±0.2 mmHg at 25°C |
| Refractive Index | 1.516 |
GHS Safety & Compliance
- H228
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
Customs & Trade Information
| HS Code | 2903999090 |
|---|---|
| Summary | 2903999090 halogenated derivatives of aromatic hydrocarbons VAT:17.0% Tax rebate rate:9.0% Supervision conditions:none MFN tariff:5.5% General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of 4-Fluorophenylacetylene?
The CAS number of 4-Fluorophenylacetylene is 766-98-3.
What are the molecular formula and molecular weight of 4-Fluorophenylacetylene?
4-Fluorophenylacetylene has molecular formula C8H5F and molecular weight 120.124 g/mol.
Is 4-Fluorophenylacetylene hazardous?
4-Fluorophenylacetylene has GHS signal word Danger and hazard statements H228; H315 — Causes skin irritation; H319 — Causes serious eye irritation.
What are the upstream and downstream products of 4-Fluorophenylacetylene?
For 4-Fluorophenylacetylene, Upstream Products: (4-fluorophenylethynyl)trimethylsilane, 4-Fluoroiodobenzene, Propiolic acid; Downstream Products: 2-Bromo-1-(4-fluorophenyl)ethan-1-one, 2-(4-Fluorophenyl)imidazo[1,2-a]pyridine, 4'-Fluoroacetanilide.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "4-Fluorophenylacetylene (CAS 766-98-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-9422-4 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.