Methyldiphenylphosphine oxide
Also known as: Methyl(diphenyl)phosphine oxide, Diphenylmethylphosphine oxide, Methyl diphenyl phosphine oxide, (C6H5)2(CH3)P=O, Phosphine oxide, methyldiphenyl-, methyl(diphenyl)phosphane oxide, (methyl-phenylphosphoryl)benzene
Methyldiphenylphosphine oxide (CAS 2129-89-7) is a compound in the Aromatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C13H13OP and a molecular weight of 216.21500 g/mol. Key properties include a melting point of 111-115 °C(lit.), a boiling point of 180 °C / 1mmHg, a density of 1.12g/cm3 and a flash point of 140ºC. It is classified under GHS with signal word Warning and hazard statements H302 — Harmful if swallowed, H312 — Harmful in contact with skin and H315 — Causes skin irritation. No supplier offers are currently listed; request a quote. Record last updated Nov 3, 2026.
- CAS No.
- 2129-89-7
- Jingsj CID
- J-4177-0
- Molecular Formula
- C13H13OP
- Molecular Weight
- 216.21500 g/mol
- Category
- Aromatic Hydrocarbons
- Last updated
- 11/3/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 111-115 °C(lit.) |
|---|---|
| Boiling Point | 180 °C / 1mmHg |
| Density | 1.12g/cm3 |
| Flash Point | 140ºC |
| Exact Mass | 216.07000 |
| PSA | 26.88000 |
| LogP | 2.63030 |
| Vapor Pressure | 0.00127mmHg at 25°C |
| Refractive Index | 1.565 |
GHS Safety & Compliance
- H302 — Harmful if swallowed
- H312 — Harmful in contact with skin
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H332 — Harmful if inhaled
- H335 — May cause respiratory irritation
Customs & Trade Information
| HS Code | 2902909090 |
|---|---|
| Summary | 2902909090 other aromatic hydrocarbons。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。MFN tariff:2.0%。General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of Methyldiphenylphosphine oxide?
The CAS number of Methyldiphenylphosphine oxide is 2129-89-7.
What are the molecular formula and molecular weight of Methyldiphenylphosphine oxide?
Methyldiphenylphosphine oxide has molecular formula C13H13OP and molecular weight 216.21500 g/mol.
Is Methyldiphenylphosphine oxide hazardous?
Methyldiphenylphosphine oxide has GHS signal word Warning and hazard statements H302 — Harmful if swallowed; H312 — Harmful in contact with skin; H315 — Causes skin irritation.
What are the upstream and downstream products of Methyldiphenylphosphine oxide?
For Methyldiphenylphosphine oxide, Upstream Products: Methyl diphenylphosphinite, Diphenylphosphine oxide, iodomethane; Downstream Products: Allyldiphenylphosphine oxide, Methylphenylphosphinic acid, Triphenylarsine oxide.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Methyldiphenylphosphine oxide (CAS 2129-89-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-4177-0 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.