Butylphosphonic dichloride

Also known as: 1-dichlorophosphorylbutane, Butanephosphonic dichloride, Butyl-phosphonsaeure-dichlorid, Butylphosphonic dichloride, Butylphosphonic dichloride,98%, MFCD00002076, Phosphonic dichloride, P-butyl-, Phosphonic dichloride, P-butyl, butyl phosphorodichloridite, butylphosphonic acid dichloride, butylphosphonyl dichloride, n-Butyldichlorophosphine Oxide, n-Butylphosphonic dichloride, n-Butylphosphonyl dichloride

Butylphosphonic dichloride (CAS 2302-80-9) is a compound in the Organohalogen Compounds category listed in the Jingsj chemical database. It has the molecular formula C4H9Cl2OP and a molecular weight of 174.99300 g/mol. Key properties include a boiling point of 96-97ºC, a density of 1.241 and a flash point of 113ºC. It is classified under GHS with signal word Danger and hazard statements H302 — Harmful if swallowed, H312 — Harmful in contact with skin and H332 — Harmful if inhaled. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 2302-80-9
Jingsj CID: J-30019-6
Molecular Formula: C₄H₉Cl₂OP
Molecular Weight: 174.99300 g/mol
Category: Organohalogen Compounds
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	96-97ºC
Density	1.241
Flash Point	113ºC
Exact Mass	173.97700
PSA	26.88000
LogP	3.45720
Vapor Pressure	0.218mmHg at 25°C
Refractive Index	1.466

GHS Safety & Compliance

Corrosion / IrritantSignal word: Danger

H302 — Harmful if swallowed
H312 — Harmful in contact with skin
H332 — Harmful if inhaled
H314 — Causes severe skin burns and eye damage

Customs & Trade Information

HS Code	2931900090
Summary	2931900090. other organo-inorganic compounds. VAT:17.0%. Tax rebate rate:13.0%. Supervision conditions:AB(certificate of inspection for goods inward,certificate of inspection for goods outward). MFN tariff:6.5%. General tariff:30.0%

Frequently Asked Questions

What is the CAS number of Butylphosphonic dichloride?

The CAS number of Butylphosphonic dichloride is 2302-80-9.

What are the molecular formula and molecular weight of Butylphosphonic dichloride?

Butylphosphonic dichloride has molecular formula C4H9Cl2OP and molecular weight 174.99300 g/mol.

Is Butylphosphonic dichloride hazardous?

Butylphosphonic dichloride has GHS signal word Danger and hazard statements H302 — Harmful if swallowed; H312 — Harmful in contact with skin; H332 — Harmful if inhaled.

What are the upstream and downstream products of Butylphosphonic dichloride?

For Butylphosphonic dichloride, Upstream Products: Diethyl n-butanephosphonate, Dibutyl butylphosphonate, n-Butane; Downstream Products: Dibutyl butylphosphonate.

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

Last updated: 8/21/2026

How to cite: Jingsj. "Butylphosphonic dichloride (CAS 2302-80-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-30019-6 (accessed 2026-11-09).

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