What is Trioctylamine CAS 1116-76-3?

Trioctylamine, also called tri-n-octylamine or TOA, is a high-molecular-weight tertiary aliphatic amine with the formula C24H51N. It consists of three octyl chains attached to a central nitrogen atom, giving it strong hydrophobicity, low volatility, and good compatibility with organic solvents.

Why is Trioctylamine used in uranium and rare earth solvent extraction?

Its tertiary amine nitrogen forms reversible ion pairs with acidic metal complexes, allowing uranium, rare earth elements, and other metal ions to transfer from an aqueous phase into an organic phase. This acid-base extraction mechanism is widely used in hydrometallurgical separation and purification circuits.

Is Trioctylamine soluble in water?

No, Trioctylamine is practically insoluble in water and is designed for organic-phase or biphasic extraction systems. It is soluble in many organic solvents, which is why it functions as an extractant rather than an aqueous additive.

What are the key physical specifications of Trioctylamine?

Commercial Trioctylamine is typically a clear, colorless to pale yellow liquid with an amine odor, a density near 0.81-0.83 g/cm3, and a boiling point around 365-370 C. Its high molecular weight also contributes to low vapor pressure and reduced evaporation during industrial handling.

Can Trioctylamine be regenerated and reused after extraction?

Yes. The extracted acid or metal complex can be stripped from the loaded organic phase with an alkaline solution, which releases the target species and regenerates the amine for another extraction cycle. This reversibility is a key reason TOA is used in continuous solvent-extraction processes.

Trioctylamine (TOA) CAS 1116-76-3

Trioctylamine, also called tri-n-octylamine or TOA, CAS 1116-76-3, is a high-molecular-weight tertiary aliphatic amine supplied as a liquid and positioned for selective extraction, phase transfer and amine-based reactivity. Confirm the required grade, then request a quotation with COA/TDS/SDS for bulk supply.

CAS: 1116-76-3
Synonyms: Tri-n-octylamine; TOA
Einecs: 214-242-1
Molecular Formula: C24H51N
Grade: Industrial / technical grade
Package: Standard export liquid chemical packaging

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Product Description

Trioctylamine (TOA) CAS 1116-76-3 is a high-molecular-weight tertiary aliphatic amine with EC 214-242-1 and molecular formula C24H51N.

Synonyms: Tri-n-octylamine; TOA.

CAS: 1116-76-3.

Molecular formula: C24H51N.

It is supplied as a clear, colorless to pale yellow liquid with an amine odor.

It has a molecular weight of about 353.7 g/mol.

It is positioned as an extractant and phase-transfer amine for selective extraction and acid recovery.

It is used in hydrometallurgical solvent extraction for recovery and separation of uranium, rare earth elements, and other metal ions.

It is used in acid recovery to extract mineral acids such as hydrochloric acid and sulfuric acid from aqueous streams.

It is used as an intermediate in the synthesis of quaternary ammonium compounds and other amine derivatives.

Its tertiary amine nitrogen forms reversible ion pairs with acidic metal complexes, enabling extraction and later stripping for reuse.

Confirm the required industrial or technical grade, assay, appearance, and related specifications for the chosen grade.

Check compatibility with the target organic phase, aqueous feed, and extraction or separation conditions.

Store in a cool, well-ventilated area, away from direct sunlight and sources of heat or ignition.

Keep containers tightly closed to avoid contact with air and moisture during storage and transfer.

Confirm packaging suitable for the liquid form and order quantity, and follow the current SDS.

Confirm grade, packaging, and specification as required.

The page is an RFQ entry point and does not state stock, price, MOQ, or fixed lead time.

For an RFQ, state the intended application, required grade, quantity, packaging, destination, and document needs.

FAQ - Technical & Supply Chain

Q:
What is Trioctylamine CAS 1116-76-3?

A: Trioctylamine, also called tri-n-octylamine or TOA, is a high-molecular-weight tertiary aliphatic amine with the formula C24H51N. It consists of three octyl chains attached to a central nitrogen atom, giving it strong hydrophobicity, low volatility, and good compatibility with organic solvents.
Q:
Why is Trioctylamine used in uranium and rare earth solvent extraction?

A: Its tertiary amine nitrogen forms reversible ion pairs with acidic metal complexes, allowing uranium, rare earth elements, and other metal ions to transfer from an aqueous phase into an organic phase. This acid-base extraction mechanism is widely used in hydrometallurgical separation and purification circuits.
Q:
Is Trioctylamine soluble in water?

A: No, Trioctylamine is practically insoluble in water and is designed for organic-phase or biphasic extraction systems. It is soluble in many organic solvents, which is why it functions as an extractant rather than an aqueous additive.
Q:
What are the key physical specifications of Trioctylamine?

A: Commercial Trioctylamine is typically a clear, colorless to pale yellow liquid with an amine odor, a density near 0.81-0.83 g/cm3, and a boiling point around 365-370 C. Its high molecular weight also contributes to low vapor pressure and reduced evaporation during industrial handling.
Q:
Can Trioctylamine be regenerated and reused after extraction?

A: Yes. The extracted acid or metal complex can be stripped from the loaded organic phase with an alkaline solution, which releases the target species and regenerates the amine for another extraction cycle. This reversibility is a key reason TOA is used in continuous solvent-extraction processes.

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