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Triisobutylphosphine

Also known as: Tris(2-methylpropyl)phosphine, Tri-i-butylphosphine, Phosphine, tris(2-methylpropyl)-, tri-isobutylphosphane, Triibutylphosphinemin

Triisobutylphosphine (CAS 4125-25-1) is a compound in the Aliphatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C12H27P and a molecular weight of 202.31700 g/mol. Key properties include a boiling point of 126ºC50 mm Hg(lit.), a density of 0.811 g/mL at 25ºC(lit.) and a flash point of 10.0 °C. No supplier offers are currently listed; request a quote. Record last updated Nov 2, 2026.

CAS No.
4125-25-1
Jingsj CID
J-40453-5
Molecular Formula
C12H27P
Molecular Weight
202.31700 g/mol
Category
Aliphatic Hydrocarbons
Last updated
11/2/2026
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Physicochemical Properties

Boiling Point126ºC50 mm Hg(lit.)
Density0.811 g/mL at 25ºC(lit.)
Flash Point10.0 °C
Exact Mass202.18500
PSA13.59000
LogP4.43630
Refractive Indexn20/D 1.451(lit.)

Customs & Trade Information

HS Code2931900090
Summary2931900090. 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 Triisobutylphosphine?

The CAS number of Triisobutylphosphine is 4125-25-1.

What are the molecular formula and molecular weight of Triisobutylphosphine?

Triisobutylphosphine has molecular formula C12H27P and molecular weight 202.31700 g/mol.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated:

How to cite: Jingsj. "Triisobutylphosphine (CAS 4125-25-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-40453-5 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.