Trioctylphosphine

CAS 4731-53-7[CH3(CH2)7]3PCatalysis & Inorganic

Trioctylphosphine (CAS 4731-53-7), with the linear formula [CH3(CH2)7]3P and a molecular weight of 370.64 g/mol, is a trialkylphosphine commonly employed as a ligand in organometallic chemistry and homogeneous catalysis. Its bulky, electron-donating nature makes it valuable for stabilising metal centres and influencing catalytic activity in various synthetic transformations. It is typically supplied at 97% purity for research and industrial applications.

IUPAC: P(Oct)3,TOP
Synonyms: Trioctyl phosphineTris(octyl)phosphineP(Oct)3TOP

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Trioctylphosphine ([CH3(CH2)7]3P) — chemical structure, CAS 4731-53-7; Chemistry, fine chemical supplied by Tech Serve Solutions

Chemical SynthesisPhosphine CompoundsPhosphine Ligands

01 /Applications

Ligand in Homogeneous Catalysis

Trioctylphosphine serves as a crucial ligand in transition metal catalysis, particularly in reactions such as hydroformylation, hydrogenation, and cross-coupling. Its steric and electronic properties help control catalyst selectivity and activity.

Precursor for Organometallic Complexes

It is used as a precursor for synthesising various organometallic complexes. These complexes find applications in areas ranging from materials science to advanced chemical synthesis.

Stabiliser in Nanoparticle Synthesis

In nanoparticle synthesis, trioctylphosphine can act as a capping agent or stabiliser. It helps control particle size and prevent aggregation, leading to more uniform nanomaterials.

02 /Properties

Molecular weight	370.64
Linear formula	[CH3(CH2)7]3P
Assay	97%
Boiling point	284-291 °C/50 mmHg(lit.)
Density	0.831 g/mL at 25 °C(lit.)
Refractive index	n20/D 1.468(lit.)

03 /Safety & handling

GHS hazard pictogram: Corrosive (GHS05) — Corrosive

Danger

Hazard statements

H314Causes severe skin burns and eye damage

Precautionary statements

P280Wear protective gloves, clothing and eye/face protection
P305IF IN EYES
P310Immediately call a POISON CENTER or doctor

Flash point	147 °C / 296.6 °F
Transport (UN / ADR)	UN 1760 8 / PGII
Water hazard class (WGK, DE)	2
Hazard codes (EU)	C
Risk statements (R)	34
Safety statements (S)	26-36/37/39-45

Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.

04 /Identifiers & registry

CAS number

4731-53-7

MDL number

MFCD00015298

Beilstein registry

1776995

05 /Quality & supply

Documentation

Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.

Supply & logistics

Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.

06 /Frequently asked questions

What is Trioctylphosphine used for?

Trioctylphosphine is primarily used as a ligand in homogeneous catalysis, a precursor for organometallic complexes, and a stabiliser in nanoparticle synthesis.

What is the CAS number and chemical formula for Trioctylphosphine?

The CAS number for Trioctylphosphine is 4731-53-7, and its linear chemical formula is [CH3(CH2)7]3P.

What grade and purity does Tech Serve Solutions supply?

Tech Serve Solutions supplies Trioctylphosphine with an assay of 97%. We do not represent this product as meeting any pharmacopoeia standards (USP, BP, EP).

How should Trioctylphosphine be handled safely?

Trioctylphosphine causes severe skin burns and eye damage (H314). Handle with appropriate personal protective equipment, including gloves, eye protection, and protective clothing. Ensure adequate ventilation. Refer to the Safety Data Sheet for comprehensive handling instructions.

How is Trioctylphosphine typically packed and exported?

Trioctylphosphine is packed in UN-approved containers suitable for hazardous materials and exported according to international shipping regulations for dangerous goods.

How can I request a sample or quote for Trioctylphosphine?

To request a sample or a quotation, please contact our sales department through the website or by calling us directly. Please specify the quantity required and your delivery location.