Tri-n-octylamine

Name: Tri-n-octylamine
Brand: Royalchem
Rating: 5.0 (88 reviews)

CAS NO. 1116-76-3

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Model:
Industrial Grade TOA ≥95%
Brand:
Royalchem
Code:
1116-76-3

Product Description

Product Name	Tri-n-octylamine (TOA) (Synonyms: Trioctylamine; N,N-Dioctyl-1-octanamine)
CAS NO.	1116-76-3
Formula & Weight	C₂₄H₅₁N (MW: 353.67) \| EC: 214-242-1 \| MDL: MFCD00009560
Chemical Structure
Typical Specifications	Royalchem current industrial-grade typical specification; actual batch COA prevails. Appearance: Colorless to pale yellow transparent liquid Assay: ≥95.0% Total Amine Value: 151.0–159.0 mg KOH/g Moisture: ≤0.30% Color: ≤60 (test method subject to supplier specification)
Reference Properties	Specific Gravity: Approx. 0.81 Boiling Point: Approx. 367 °C Refractive Index: Approx. 1.45 Water Solubility: Practically insoluble in water Chemical Type: Hydrophobic long-chain aliphatic tertiary amine
Key Applications	Tri-n-octylamine is primarily used as ahydrophobic tertiary amine extractantin liquid-liquid solvent extraction and reactive separation systems. Metal & Hydrometallurgical Extraction:In acidic media, TOA can form protonated amine salts and ion-association complexes with selected metal-containing anionic species, enabling their transfer into an organic phase. Precious-Metal Extraction:Tri-n-octylamine is commercially documented as an extractant for precious metals and is used in specialized metal separation and recovery systems. Organic Acid Extraction:TOA is used for reactive extraction of organic acids including acetic acid, succinic acid and related carboxylic acids. Formation of hydrophobic amine-acid complexes can enhance transfer of the acid into the organic phase. Specialty Metal Separation:Published studies have investigated TOA in extraction and separation systems involving uranium, cobalt and selected rare-earth species. Actual extraction selectivity depends strongly on acid medium, metal speciation, diluent and process conditions. Battery Recycling Research:Long-chain tertiary amine extractants including Tri-n-octylamine are relevant to hydrometallurgical separation and metal-recovery research for spent battery materials. Ion-Pair Chromatography:High-purity Tri-n-octylamine is also commercially available as a reagent for ion-pair chromatography. This application normally requires a higher-purity reagent grade than standard industrial extraction grades.
Packaging, Storage & Shipping	Packaging:Commercial packaging is selected according to product grade, order quantity and transport requirements. Final package type and net weight are confirmed with the commercial order. Storage:Keep the container tightly closed in a cool, dry and well-ventilated place. Avoid unnecessary exposure to air and incompatible chemicals. High-purity reference grades are recommended to be stored under inert gas.

Important Product Identity Note:This page refers specifically to Tri-n-octylamine, CAS 1116-76-3, which contains three n-octyl groups. It should not automatically be treated as identical to commercial tri-C8–10 alkylamine mixtures. Products based on mixed C8–C10 alkyl chains may have a different CAS number, composition, molecular-weight distribution and extraction behavior. When replacing an existing industrial extractant grade, customers should confirm CAS number, alkyl-chain composition, assay and total amine valuebefore assuming equivalence.

Sourcing TOA for Metal or Organic Acid Extraction?

Royalchem suppliesTri-n-octylamine (TOA, CAS 1116-76-3)with a current typical industrial specification ofassay ≥95% and total amine value 151–159 mg KOH/g. Typical applications include hydrometallurgical metal separation, precious-metal extraction and reactive extraction of organic acids. Batch-specificCOA, SDS, specification confirmation and international logistics supportare available for commercial supply.
Contact Royalchem with the target metal or acid system, required assay, total amine value and quantity for specification matching and quotation.

How Tri-n-octylamine Works as an Extractant

Tertiary Amine Chemistry	TOA is a hydrophobic tertiary amine. In acidic systems it can become protonated, forming an organic-soluble ammonium species capable of associating with suitable anions or acid molecules.
Metal Extraction	Suitable anionic metal complexes can associate with protonated TOA and transfer preferentially from the aqueous phase into the organic phase. Extraction behavior therefore depends strongly on acid concentration, metal speciation and the chosen diluent.
Organic Acid Extraction	Carboxylic acids can interact with TOA to form amine-acid complexes, which increases their distribution into the organic phase and enables reactive extraction and separation.

Typical Quality Specifications

Test Item	Typical Specification
Appearance	Colorless to pale yellow transparent liquid
Assay, %	≥95.0
Total Amine Value, mg KOH/g	151.0–159.0
Moisture, %	≤0.30
Color	≤60*

*Color test method should be confirmed against the applicable supplier specification. Final specifications and analytical results are subject to the actual batch COA.

Frequently Asked Questions

What is Tri-n-octylamine mainly used for?	Its most relevant commercial use is as a hydrophobic tertiary amine extractant for liquid-liquid solvent extraction, including metal separation and reactive extraction of organic acids.
Is TOA a solvent?	TOA is better described as the active extractant rather than an ordinary organic solvent. In many solvent-extraction processes it is dissolved in a suitable organic diluent to form the extraction phase.
What organic acids can TOA extract?	Commercial and published references describe TOA extraction systems for acids including acetic acid, succinic acid and other carboxylic acids. Performance depends on the diluent, TOA concentration, acid concentration and operating conditions.
Can TOA be used for metal extraction?	Yes. TOA has been used and studied in solvent-extraction and membrane systems involving precious metals and selected metal complexes, including uranium and cobalt. Suitability is highly dependent on aqueous chemistry and metal speciation.
Is Tri-n-octylamine the same as Alamine 336?	No, they should not automatically be treated as the same chemical. This page refers to Tri-n-octylamine, CAS 1116-76-3, containing three n-octyl groups. Commercial tri-C8–10 alkylamine products use mixed alkyl-chain compositions and may carry a different CAS number. Always compare composition and technical specifications before substitution.
What does a total amine value of 151–159 mg KOH/g mean?	The total amine value represents the amount of basic amine functionality measurable by acid titration and is an important industrial quality parameter for tertiary-amine extractants. It should be evaluated together with assay, water and composition.
Can Royalchem provide COA and SDS?	Yes. Batch-specific COA, SDS and specification confirmation can be provided for commercial supply. For extraction applications, customers should provide the target metal or acid system, required assay, amine value and target quantity.