o-Toluenesulfonyl chloride
邻甲苯磺酰氯
Also known as: 2-methylbenzenesulfonyl chloride, o-tolylsulfonyl chloride, o-tosyl chloride, ortho-toluenesulfochloride, ortho-toluenesulfonchloride, toluene-2-sulfonyl chloride, 2-methylbenzene-1-sulfonyl chloride, 2-methylphenylsulfonyl chloride, benzenesulfonyl chloride, 2-methyl-
o-Toluenesulfonyl chloride (CAS 133-59-5) is a compound in the Solvents category listed in the Jingsj chemical database. It has the molecular formula C7H7ClO2S and a molecular weight of 190.64700 g/mol. It is also known as 2-methylbenzenesulfonyl chloride, o-tolylsulfonyl chloride and o-tosyl chloride. Key properties include a melting point of 10°C, a boiling point of 254 °C(lit.), a density of 1.320 g/mL at 25 °C(lit.) and a flash point of >230 °F. GHS signal word: Danger. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 133-59-5
- Jingsj CID
- J-12187-9
- Molecular Formula
- C7H7ClO2S
- Chinese Name
- 邻甲苯磺酰氯
- Molecular Weight
- 190.64700 g/mol
- Category
- Solvents
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 10°C |
|---|---|
| Boiling Point | 254 °C(lit.) |
| Density | 1.320 g/mL at 25 °C(lit.) |
| Flash Point | >230 °F |
GHS Safety & Compliance
Frequently Asked Questions
What is the CAS number of o-Toluenesulfonyl chloride?
The CAS number of o-Toluenesulfonyl chloride is 133-59-5.
What are the molecular formula and molecular weight of o-Toluenesulfonyl chloride?
o-Toluenesulfonyl chloride has molecular formula C7H7ClO2S and molecular weight 190.64700 g/mol.
Is o-Toluenesulfonyl chloride hazardous?
o-Toluenesulfonyl chloride has GHS signal word Danger.
Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "o-Toluenesulfonyl chloride (CAS 133-59-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-12187-9 (accessed 2026-10-22).
Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.