Overview
Trioctylamine (CAS 1116-76-3 ), also known as TOA or tri-n-caprylylamine, is a long-chain tertiary amine used across extraction, catalysis, and surface modification processes.
Its high selectivity for acidic species makes it a preferred extractant in hydrometallurgical and chemical purification operations. In solvent extraction, TOA selectively recovers acids and rare earth metals.
It is also used for valuable intermediates from aqueous process streams, making it a standard reagent in metal refining and pharmaceutical purification. Polymer and coating formulators incorporate it as a catalyst.
It is used in curing systems, particularly where controlled reactivity and compatibility with organic matrices are required. In personal care and cosmetic formulations, TOA functions as an emulsifier and pH modifier.
It supports stable dispersion of active ingredients across oil-and-water systems. It also serves as a phase-transfer catalyst and surface modifier in adhesive and sealant manufacturing, improving substrate wetting.
Trioctylamine is supplied as a clear to pale yellow liquid. Standard commercial grades include technical-grade material, with purity levels typically ranging from 95% to 99%+ for demanding applications.
Packaging options are commonly available in drum and IBC quantities to support both laboratory-scale evaluation and bulk industrial procurement for various manufacturing sectors.
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Physical Properties
| Melting Point | -34.6 °C |
| Boiling Point | 366 °C (approx) |
| Density | 0.809 g/cm³ |
| Flash Point | >230 °F |
| Appearance | Clear colorless liquid |
| Color | White to off-white |
| Form | Low Melting Crystalline Mass |
| Water Solubility | Miscible with chloroform. Immiscible with water. |
| Vapor Pressure | <0.01 hPa (20 °C) |
| Refractive Index | n 20/D 1.449(lit.) |
Safety & Handling
Danger GHS07 GHS08 GHS09 Hazard Statements H315 Causes skin irritation H319 Causes serious eye irritation H335 May cause respiratory irritation H360 May damage fertility or the unborn child H372 Causes damage to organs through prolonged or repeated exposure H373 May causes damage to organs through prolonged or repeated exposure H400 Very toxic to aquatic life H410 Very toxic to aquatic life with long lasting effects H411 Toxic to aquatic life with long lasting effects Precautionary Statements P203 Obtain, consult and follow expert instructions for use. P260 Do not breathe dust/fume/gas/mist/vapours/spray. P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P264 Wash … thoroughly after handling. P270 Do not eat, drink or smoke when using this product. P271 Use only outdoors or in a well-ventilated area. P273 Avoid release to the environment. P280 Wear protective gloves/protective clothing/eye protection/face protection. P318 IF exposed or concerned, get medical advice. P319 Get medical advice/attention if you feel unwell. P321 Specific treatment (see … on this label). P391 Collect spillage. P405 Store locked up. P501 Dispose of contents/container in accordance with local regulations. P264+P265 Wash … thoroughly after handling. P302+P352 IF ON SKIN: Wash with plenty of water. P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing. P332+P317 Get emergency medical help. P337+P317 If eye irritation persists: Get medical advice/attention. Get emergency medical help. P362+P364 Take off contaminated clothing and wash it before reuse. P403+P233 Store in a well-ventilated place. Keep container tightly closed. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
Trade & Regulatory
| HS Code | 29211980 |
| UN Number | 3082 |
| Storage Class | 6.1C - Combustible acute toxic Cat.3 toxic compounds or compounds which causing chronic effects |
| WGK (Germany) | 2 |
Other Names
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Chemical Properties
- CAS Number
- 1116-76-3
- EC Number
- 214-242-1
- Mol. Weight
- 353.7
- HS Code
- 29211980
- Category
- Surfactants