Trimethyl phosphate
Also known as: Methyl phosphate, Phosphoric acid trimethyl ester, Trimethoxyphosphine oxide, Trimethyl orthophosphate, TMP, TMPA, TMPO, (CH3O)3PO, NCI-C03781, O,O,O-Trimethyl phosphate
Trimethyl phosphate (CAS 512-56-1) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C3H9O4P and a molecular weight of 140.07 g/mol. Key properties include a melting point of -46 °C, a boiling point of 197.2±0.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 83.7±38.8 °C. It is classified under GHS with signal word Danger and hazard statements H302 — Harmful if swallowed, H315 — Causes skin irritation and H319 — Causes serious eye irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 512-56-1
- Jingsj CID
- J-45287-9
- Molecular Formula
- C3H9O4P
- Molecular Weight
- 140.07 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | -46 °C |
|---|---|
| Boiling Point | 197.2±0.0 °C at 760 mmHg |
| Density | 1.2±0.1 g/cm3 |
| Flash Point | 83.7±38.8 °C |
| Exact Mass | 140.023849 |
| PSA | 54.57000 |
| LogP | -0.52 |
| Vapor Pressure | 0.5±0.3 mmHg at 25°C |
| Refractive Index | 1.379 |
| Additional Property | 500 G/L (25 ºC) |
GHS Safety & Compliance
- H302 — Harmful if swallowed
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H340
- H351 — Suspected of causing cancer
Customs & Trade Information
| HS Code | 2919900090 |
|---|---|
| Summary | 2919900090 other phosphoric esters and their salts, including lactophosphates; their halogenated, sulphonated, nitrated or nitrosated derivatives。supervision conditions:AB(certificate of inspection for goods inward,certificate of inspection for goods outward)。VAT:17.0%。tax rebate rate:9.0%。MFN tariff:6.5%。general tariff:30.0% |
Frequently Asked Questions
What is the CAS number of Trimethyl phosphate?
The CAS number of Trimethyl phosphate is 512-56-1.
What are the molecular formula and molecular weight of Trimethyl phosphate?
Trimethyl phosphate has molecular formula C3H9O4P and molecular weight 140.07 g/mol.
Is Trimethyl phosphate hazardous?
Trimethyl phosphate has GHS signal word Danger and hazard statements H302 — Harmful if swallowed; H315 — Causes skin irritation; H319 — Causes serious eye irritation.
What are the upstream and downstream products of Trimethyl phosphate?
For Trimethyl phosphate, Upstream Products: Methanol, Trimethyl thiophosphate, Trimethyl phosphite; Downstream Products: Formaldehyde, 1-Bromo-4-(dimethylamino)naphthalene, 4-Bromo-N,N,2-trimethylaniline.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Trimethyl phosphate (CAS 512-56-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-45287-9 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.