Tributylphosphine
Also known as: Tri-n-butylphosphine, Phosphine, tributyl-, Tris(butyl)phosphine, Tributylphosphane, Tributylfosfin, PBU3, UNII:0O52FJR7WN
Tributylphosphine (CAS 998-40-3) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C12H27P and a molecular weight of 202.316 g/mol. Key properties include a melting point of -65 °C, a boiling point of 244.8±0.0 °C at 760 mmHg, a density of 0.81 g/mL at 25 °C(lit.) and a flash point of 112.2±25.0 °C. It is classified under GHS with signal word Danger and hazard statements H226 — Flammable liquid and vapour, H250 and H302 — Harmful if swallowed. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 998-40-3
- Jingsj CID
- J-1991159-2
- Molecular Formula
- C12H27P
- Molecular Weight
- 202.316 g/mol
- Category
- Organic Compounds
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | -65 °C |
|---|---|
| Boiling Point | 244.8±0.0 °C at 760 mmHg |
| Density | 0.81 g/mL at 25 °C(lit.) |
| Flash Point | 112.2±25.0 °C |
| Exact Mass | 202.185043 |
| PSA | 13.59000 |
| LogP | 5.60 |
| Additional Property | 9 (vs air) |
| Vapor Pressure | 0.0±0.4 mmHg at 25°C |
| Refractive Index | n20/D 1.462(lit.) |
| Additional Property | insoluble |
GHS Safety & Compliance
- H226 — Flammable liquid and vapour
- H250
- H302 — Harmful if swallowed
- H312 — Harmful in contact with skin
- H314 — Causes severe skin burns and eye damage
Customs & Trade Information
| HS Code | 2931900090 |
|---|---|
| Summary | 2931900090. other organo-inorganic compounds. VAT:17.0%. Tax rebate rate:13.0%. Supervision conditions:AB(certificate of inspection for goods inward,certificate of inspection for goods outward). MFN tariff:6.5%. General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of Tributylphosphine?
The CAS number of Tributylphosphine is 998-40-3.
What are the molecular formula and molecular weight of Tributylphosphine?
Tributylphosphine has molecular formula C12H27P and molecular weight 202.316 g/mol.
Is Tributylphosphine hazardous?
Tributylphosphine has GHS signal word Danger and hazard statements H226 — Flammable liquid and vapour; H250; H302 — Harmful if swallowed.
What are the upstream and downstream products of Tributylphosphine?
For Tributylphosphine, Upstream Products: Tributylphosphine oxide, 1-Bromobutane, Butylmagnesium bromide; Downstream Products: 1-(Pyridin-2-yl)piperazin-2-one, Triphenylmethanol, Triphenylmethane.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Tributylphosphine (CAS 998-40-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1991159-2 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.