2-Butynyl p-toluenesulfonate

对甲苯磺酸2-丁炔酯

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. It is also known as 2-Butynyl 4-methylbenzenesulfonate, 2-Butynyl p-toluenesulphonate and 1-(p-Tosyloxy)-2-butyne. 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. GHS signal word: Warning. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 56563-37-2
Jingsj CID: J-1400393-0
Molecular Formula: C₁₁H₁₂O₃S
Chinese Name: 对甲苯磺酸2-丁炔酯
Molecular Weight: 224.27600 g/mol
Category: Solvents
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	47 °C
Boiling Point	355.2ºC at 760 mmHg
Density	1,012 g/cm3
Flash Point	>110 °C

GHS Safety & Compliance

IrritantSignal word: Warning

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.

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

Last updated: 8/21/2026

How to cite: Jingsj. "2-Butynyl p-toluenesulfonate (CAS 56563-37-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1400393-0 (accessed 2026-10-22).

Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.