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2-Chloro-1,3,2-benzodioxaphosphole

1,2-亚苯基-次氯酸化膦

Also known as: o-Phenylene phosphorochloridite, 1,2-Phenylene phosphorochloridite, Catechyl phosphorus chloride, 2-Chloro-1,3,2-benzodioxaphosphole, 1,3,2-Benzodioxaphosphole, 2-chloro-, MFCD00005853, EINECS 216-690-3

2-Chloro-1,3,2-benzodioxaphosphole (CAS 1641-40-3) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C6H4ClO2P and a molecular weight of 174.52200 g/mol. It is also known as o-Phenylene phosphorochloridite, 1,2-Phenylene phosphorochloridite and Catechyl phosphorus chloride. Key properties include a melting point of 30-35 °C(lit.), a boiling point of 80 °C20 mm Hg(lit.), a density of 1.466 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.
1641-40-3
Jingsj CID
J-22219-6
Molecular Formula
C6H4ClO2P
Chinese Name
1,2-亚苯基-次氯酸化膦
Molecular Weight
174.52200 g/mol
Category
Organic Acids
Last updated
8/21/2026

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Physicochemical Properties

Melting Point30-35 °C(lit.)
Boiling Point80 °C20 mm Hg(lit.)
Density1.466 g/mL at 25 °C(lit.)
Flash Point>230 °F

GHS Safety & Compliance

CorrosionSignal word: Danger

Frequently Asked Questions

What is the CAS number of 2-Chloro-1,3,2-benzodioxaphosphole?

The CAS number of 2-Chloro-1,3,2-benzodioxaphosphole is 1641-40-3.

What are the molecular formula and molecular weight of 2-Chloro-1,3,2-benzodioxaphosphole?

2-Chloro-1,3,2-benzodioxaphosphole has molecular formula C6H4ClO2P and molecular weight 174.52200 g/mol.

Is 2-Chloro-1,3,2-benzodioxaphosphole hazardous?

2-Chloro-1,3,2-benzodioxaphosphole 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. "2-Chloro-1,3,2-benzodioxaphosphole (CAS 1641-40-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-22219-6 (accessed 2026-10-22).

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