Your Trioctylphosphine Partner – Superior Supply from Aure Chemical
Trioctylphosphine (TOP) (CAS 4731-53-7) is a long-chain tertiary alkylphosphine, often referred to as a "workhorse" in the field of nanomaterials chemistry. It presents as a colorless to pale yellow, oily, and slightly viscous liquid with a very mild phosphine odor compared to its shorter-chain counterparts. The extended octyl chains grant TOP exceptional thermal stability, extremely low volatility, and high lipophilicity. These properties make it indispensable for its dual role as a high-boiling, non-coordinating solvent and a capping ligand in the high-temperature synthesis of semiconductor quantum dots (QDs) and other metal nanocrystals.
Basic Information of TOP
Meticulously produced and rigorously tested to meet stringent quality standards. We ensure exceptional purity and consistent performance, essential for your critical applications:
| CAS No.: | 4731-53-7 |
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| EC No.: | 225-234-2 |
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| Linear Formula: | C24H51P |
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| Molecular Weight: | 370.64 |
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| Appearance: | Colorless to pale yellow, oily liquid |
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| Odor: | Mild, faint phosphine/garlic-like |
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| Melting Point: | 30°C |
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| Boiling Point: | 284-291 °C50 mm Hg(lit.) |
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| Density: | 0.831 g/mL at 25 °C(lit.) |
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| Solubility: | Insoluble in water; excellent solubility in non-polar solvents, oils, and high-boiling ethers. |
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| Flash Point: | 297 °F |
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| RIDADR: | UN 2845 4.2/PG 1 |
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| Chemical Structure: |  |
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Application Overview
Trioctylphosphine is a highly specialized reagent whose role is often non-negotiable in specific high-end chemical and materials science applications:
Nanocrystal Synthesis (Quantum Dots): TOP is crucial for the synthesis of Cadmium Selenide (CdSe), Lead Sulfide (PbS), and other II-VI/IV-VI quantum dots. It acts as a solvent and as a surface-capping ligand that controls the growth, size, and shape uniformity of the nanocrystals during high-temperature injection synthesis.
High-Temperature Organic Synthesis: Its extremely high boiling point and low vapor pressure make it an ideal, non-volatile ligand for metal-catalyzed reactions (e.g., cross-couplings) that require reaction temperatures exceeding $200\text{ °C}$.
Reducing Agent: Used in specialized reductions (e.g., Mitsunobu reaction, Staudinger reduction) where its solubility in highly non-polar or oily media is necessary, or where a non-volatile reagent is required for post-reaction purification.
Phase-Transfer and Extraction: The high lipophilicity of TOP and its oxidized derivative (TOPO) makes them excellent agents for the extraction and separation of metal ions in solvent extraction processes, particularly in rare-earth metal processing.
Why Choose Aure Chemical for Trioctylphosphine?
Aure Chemical offers TOP (CAS 4731-53-7) with unique quality control measures specifically designed for the stringent requirements of high-performance nanomaterials synthesis.
Ultra-Low Oxide Content (TOPO): The presence of Trioctylphosphine Oxide (TOPO) severely impacts quantum dot growth. We guarantee an oxidation content below 0.05%, which is significantly lower than commercial standards. This ultra-high purity ensures precise control over nanocrystal nucleation and growth kinetics.
Solvent-Free Delivery: We offer a highly concentrated, solvent-free product. This is vital for nanomaterials synthesis, where introduced solvents can interfere with the coordinating properties of the phosphine ligand or alter the final material’s properties.
High-Temperature Stability Verification: Our Certificate of Analysis (CoA) includes data verifying the material's thermal stability profile at typical nanocrystal synthesis temperatures (e.g., $300\text{ °C}$), providing assurance of performance and minimizing the risk of thermal degradation during your process.
Advanced Packaging for Trace Purity: TOP is shipped in precision-cleaned, inert gas-blanketed containers with specialized high-barrier seals. This meticulous handling prevents oxygen or moisture contamination, which is paramount for maintaining the material's reactivity and surface-binding efficacy.
Hazards Classification
GHS Classification: Pyr. Liq. 1 (GHS01), Skin Corr. 1B (GHS05), Eye Dam. 1 (GHS05)
Hazard Statements: Catches fire spontaneously if exposed to air; Causes severe skin burns and eye damage.
UN Number: UN 2845
Hazard Class: 4.2 (Spontaneously combustible)
Packing Group: I
GHS01: Pyrophoric
GHS05: Corrosive
