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1-chloro-4-(phenylethynyl)benzene

Also known as: (4-chlorophenyl)phenylacetylene, 4-(phenylethynyl)chlorobenzene, p-chlorodiphenylacetylene, NSC 407575, benzene, 1-chloro-4-(2-phenylethynyl)-

1-chloro-4-(phenylethynyl)benzene (CAS 5172-02-1) is a compound in the Aromatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C14H9Cl and a molecular weight of 212.67400 g/mol. Key properties include a melting point of 81-83ºC(lit.), a boiling point of 327ºC at 760mmHg, a density of 1.19g/cm3 and a flash point of 146.4ºC. It is classified under GHS with signal word Warning and hazard statements H315 — Causes skin irritation, H319 — Causes serious eye irritation and H335 — May cause respiratory irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
5172-02-1
Jingsj CID
J-20875-3
Molecular Formula
C14H9Cl
Molecular Weight
212.67400 g/mol
Category
Aromatic Hydrocarbons
Last updated
8/21/2026
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Physicochemical Properties

Melting Point81-83ºC(lit.)
Boiling Point327ºC at 760mmHg
Density1.19g/cm3
Flash Point146.4ºC
Exact Mass212.03900
LogP3.73980
Refractive Index1.634

GHS Safety & Compliance

IrritantSignal word: Warning
  • H315 — Causes skin irritation
  • H319 — Causes serious eye irritation
  • H335 — May cause respiratory irritation

Customs & Trade Information

HS Code2903999090
Summary2903999090 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 1-chloro-4-(phenylethynyl)benzene?

The CAS number of 1-chloro-4-(phenylethynyl)benzene is 5172-02-1.

What are the molecular formula and molecular weight of 1-chloro-4-(phenylethynyl)benzene?

1-chloro-4-(phenylethynyl)benzene has molecular formula C14H9Cl and molecular weight 212.67400 g/mol.

Is 1-chloro-4-(phenylethynyl)benzene hazardous?

1-chloro-4-(phenylethynyl)benzene has GHS signal word Warning and hazard statements H315 — Causes skin irritation; H319 — Causes serious eye irritation; H335 — May cause respiratory irritation.

What are the upstream and downstream products of 1-chloro-4-(phenylethynyl)benzene?

For 1-chloro-4-(phenylethynyl)benzene, Upstream Products: 1-Chloro-4-iodobenzene, 1-phenyl-2-(trimethylsilyl)acetylene, Phenylpropiolic acid; Downstream Products: 4-Chlorobenzil, 4-Chlorobenzophenone.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated:

How to cite: Jingsj. "1-chloro-4-(phenylethynyl)benzene (CAS 5172-02-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-20875-3 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.