Diphenylphosphine oxide
Also known as: DPPO, HPOPh2, Diphenylphosphinous acid, Diphenylphosphine oxide 97%, oxo(diphenyl)phosphanium, Phosphine oxide, diphenyl-, Phosphorane, diphenyl-, oxide, MFCD00002079
Diphenylphosphine oxide (CAS 4559-70-0) is a compound in the Aromatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C12H11OP and a molecular weight of 202.189 g/mol. Key properties include a melting point of 56-57 °C(lit.), a boiling point of 329.2±25.0 °C at 760 mmHg and a flash point of 152.9±23.2 °C. It is classified under GHS with signal word Warning 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.
- 4559-70-0
- Jingsj CID
- J-31105-0
- Molecular Formula
- C12H11OP
- Molecular Weight
- 202.189 g/mol
- Category
- Aromatic Hydrocarbons
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 56-57 °C(lit.) |
|---|---|
| Boiling Point | 329.2±25.0 °C at 760 mmHg |
| Flash Point | 152.9±23.2 °C |
| Exact Mass | 202.054749 |
| PSA | 40.54000 |
| LogP | 1.29 |
| Vapor Pressure | 0.0±0.7 mmHg at 25°C |
| Refractive Index | 1.608-1.61 |
GHS Safety & Compliance
- H302 — Harmful if swallowed
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- 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 Diphenylphosphine oxide?
The CAS number of Diphenylphosphine oxide is 4559-70-0.
What are the molecular formula and molecular weight of Diphenylphosphine oxide?
Diphenylphosphine oxide has molecular formula C12H11OP and molecular weight 202.189 g/mol.
Is Diphenylphosphine oxide hazardous?
Diphenylphosphine oxide has GHS signal word Warning and hazard statements H302 — Harmful if swallowed; H315 — Causes skin irritation; H319 — Causes serious eye irritation.
What are the upstream and downstream products of Diphenylphosphine oxide?
For Diphenylphosphine oxide, Upstream Products: Triphenylphosphine oxide, 3-chloroquinoxalin-2-amine, Diphenylphosphine; Downstream Products: Diphenyl(o-tolyl)phosphine, Allyldiphenylphosphine oxide, 2-(Diphenylphosphino)-2'-methoxybiphenyl.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Diphenylphosphine oxide (CAS 4559-70-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-31105-0 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.