Dimethyl methylphosphonate
Also known as: DMMP, Dimethyl methanephosphonate, Methylphosphonic acid dimethyl ester, Methanephosphonic acid dimethyl ester, Phosphonic acid, P-methyl-, dimethyl ester, [methoxy(methyl)phosphoryl]oxymethane, MFCD00008349, EINECS 212-052-3
Dimethyl methylphosphonate (CAS 756-79-6) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C3H9O3P and a molecular weight of 124.076 g/mol. Key properties include a boiling point of 181 ºC, a density of 1.145 and a flash point of 156 ºF. It is classified under GHS with signal word Danger and hazard statements H319 — Causes serious eye irritation and H340. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 756-79-6
- Jingsj CID
- J-32598-4
- Molecular Formula
- C3H9O3P
- Molecular Weight
- 124.076 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 181 ºC |
|---|---|
| Density | 1.145 |
| Flash Point | 156 ºF |
| Exact Mass | 124.028931 |
| PSA | 45.34000 |
| LogP | -0.78 |
| Vapor Pressure | 1.2±0.3 mmHg at 25°C |
| Refractive Index | 1.413 |
| Stability | Stability Combustible. Incompatible with strong oxidizing agents, strong bases. May soften some rubbers or plastics. Hydrolyzes slowly in contact with water. |
| Additional Property | >=10 g/100 mL at 21 ºC |
GHS Safety & Compliance
- H319 — Causes serious eye irritation
- H340
Frequently Asked Questions
What is the CAS number of Dimethyl methylphosphonate?
The CAS number of Dimethyl methylphosphonate is 756-79-6.
What are the molecular formula and molecular weight of Dimethyl methylphosphonate?
Dimethyl methylphosphonate has molecular formula C3H9O3P and molecular weight 124.076 g/mol.
Is Dimethyl methylphosphonate hazardous?
Dimethyl methylphosphonate has GHS signal word Danger and hazard statements H319 — Causes serious eye irritation; H340.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Dimethyl methylphosphonate (CAS 756-79-6)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-32598-4 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.