Methyl dichlorophosphite
Also known as: Dichloro methyl phosphite, Dichloromethoxyphosphine, Methoxydichlorophosphine, Methoxyphosphonous dichloride, Methyl phosphorodichloridite, O-Methyl phosphorodichloridite, Phosphorodichloridous acid methyl ester, dichloro(methoxy)phosphane
Methyl dichlorophosphite (CAS 3279-26-3) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula CH3Cl2OP and a molecular weight of 132.914 g/mol. Key properties include a melting point of −91 °C(lit.), a boiling point of 89.4±9.0 °C at 760 mmHg, a density of 1.376 g/mL at 20 °C(lit.) and a flash point of 7.9±18.7 °C. It is classified under GHS with signal word Danger and hazard statements H226 — Flammable liquid and vapour, H314 — Causes severe skin burns and eye damage and H335 — May cause respiratory irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 3279-26-3
- Jingsj CID
- J-13885-2
- Molecular Formula
- CH3Cl2OP
- Molecular Weight
- 132.914 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | −91 °C(lit.) |
|---|---|
| Boiling Point | 89.4±9.0 °C at 760 mmHg |
| Density | 1.376 g/mL at 20 °C(lit.) |
| Flash Point | 7.9±18.7 °C |
| Exact Mass | 131.929855 |
| PSA | 22.82000 |
| LogP | 3.29 |
| Vapor Pressure | 66.3±0.2 mmHg at 25°C |
| Refractive Index | n20/D 1.474(lit.) |
GHS Safety & Compliance
- H226 — Flammable liquid and vapour
- H314 — Causes severe skin burns and eye damage
- H335 — May cause respiratory irritation
Customs & Trade Information
| HS Code | 2909199090 |
|---|---|
| Summary | 2909199090. other acyclic ethers and their halogenated, sulphonated, nitrated or nitrosated derivatives. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:5.5%. General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of Methyl dichlorophosphite?
The CAS number of Methyl dichlorophosphite is 3279-26-3.
What are the molecular formula and molecular weight of Methyl dichlorophosphite?
Methyl dichlorophosphite has molecular formula CH3Cl2OP and molecular weight 132.914 g/mol.
Is Methyl dichlorophosphite hazardous?
Methyl dichlorophosphite has GHS signal word Danger and hazard statements H226 — Flammable liquid and vapour; H314 — Causes severe skin burns and eye damage; H335 — May cause respiratory irritation.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Methyl dichlorophosphite (CAS 3279-26-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-13885-2 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.