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2-Butynyl p-toluenesulfonate

Also known as: 2-Butynyl 4-methylbenzenesulfonate, 2-Butynyl p-toluenesulphonate, 1-(p-Tosyloxy)-2-butyne, But-2-yn-1-yl 4-methylbenzenesulfonate, but-2-ynyl 4-methylbenzenesulfonate, TIMTEC-BB SBB008911, MFCD00078395

2-Butynyl p-toluenesulfonate (CAS 56563-37-2) is a compound in the Solvents category listed in the Jingsj chemical database. It has the molecular formula C11H12O3S and a molecular weight of 224.27600 g/mol. Key properties include a melting point of 47 °C, a boiling point of 355.2ºC at 760 mmHg, a density of 1,012 g/cm3 and a flash point of >110 °C. 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 Nov 3, 2026.

CAS No.
56563-37-2
Jingsj CID
J-1400393-1
Molecular Formula
C11H12O3S
Molecular Weight
224.27600 g/mol
Category
Solvents
Last updated
11/3/2026
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Physicochemical Properties

Melting Point47 °C
Boiling Point355.2ºC at 760 mmHg
Density1,012 g/cm3
Flash Point>110 °C
Exact Mass224.05100
PSA51.75000
LogP2.80440
Refractive Index1.538

GHS Safety & Compliance

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

Frequently Asked Questions

What is the CAS number of 2-Butynyl p-toluenesulfonate?

The CAS number of 2-Butynyl p-toluenesulfonate is 56563-37-2.

What are the molecular formula and molecular weight of 2-Butynyl p-toluenesulfonate?

2-Butynyl p-toluenesulfonate has molecular formula C11H12O3S and molecular weight 224.27600 g/mol.

Is 2-Butynyl p-toluenesulfonate hazardous?

2-Butynyl p-toluenesulfonate 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 2-Butynyl p-toluenesulfonate?

For 2-Butynyl p-toluenesulfonate, Upstream Products: 2-Butyn-1-ol, p-Toluenesulfonyl chloride, p-Toluenesulfonic acid; Downstream Products: N-benzylbut-2-yn-1-amine.

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-Butynyl p-toluenesulfonate (CAS 56563-37-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1400393-1 (accessed 2026-11-09).

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