Overview
4-tert-Octylphenol (CAS 140-66-9 ), also known as 4-(1,1,3,3-tetramethylbutyl)phenol, is an alkylphenol intermediate used across industrial synthesis and formulation chemistry. It functions primarily as a building block for nonionic surfactants and phenolic resins.
The chemical is also essential for antioxidant systems. In coatings and adhesives, it serves as a reactive intermediate in the production of alkylphenol-ethoxylate surfactants and tackifying resins that influence adhesion and film formation.
Lubricant and metalworking formulators incorporate it into antioxidant and extreme-pressure additive packages to extend fluid service life. This ensures high performance in demanding industrial environments and mechanical systems.
In plastics and polymer processing, it contributes to UV stabilizer and antioxidant formulations. These protect against thermal and photo-oxidative degradation during compounding, maintaining the structural integrity of the final plastic products.
Printing ink manufacturers use it as a resin modifier to adjust viscosity, adhesion, and drying performance in solvent-based systems. This versatility makes it a staple component in high-quality industrial printing applications.
4-tert-Octylphenol is supplied as a white to off-white solid in flake or molten liquid form, depending on logistics requirements. Technical grade is the standard commercial offering, with purity specifications typically at 99% or above.
Packaging options generally include drums and bulk containers suited to industrial procurement volumes. Our logistics team ensures that all shipments meet the necessary safety and handling requirements for chemical distribution.
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Physical Properties
| Melting Point | 84-85 °C |
| Boiling Point | 158 °C @ Press: 20 Torr |
| Density | 0.89 g/cm³ @ Temp: 90 °C |
| Flash Point | 145 °C |
| Appearance | white powder |
| Color | White flakes |
| Form | neat |
| Water Solubility | 7mg/L at 20℃ |
| Vapor Pressure | 2Pa at 38℃ |
| Refractive Index | 1.5003 (estimate) |
| Log P | 4.8 at 22℃ |
Safety & Handling
Danger GHS05 GHS09 GHS07 GHS08 Hazard Statements H312 Harmful in contact with skin H314 Causes severe skin burns and eye damage H315 Causes skin irritation H318 Causes serious eye damage H319 Causes serious eye irritation H336 May cause drowsiness or dizziness H361 Suspected of damaging fertility or the unborn child 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 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. 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. P316 Get emergency medical help immediately. P317 Get emergency medical help. P318 IF exposed or concerned, get medical advice. P319 Get medical advice/attention if you feel unwell. P321 Specific treatment (see … on this label). P363 Wash contaminated clothing before reuse. 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. P301+P330+P331 Rinse mouth. Do NOT induce vomiting. P302+P361+P354 IF ON SKIN: Take off immediately all contaminated clothing. Rinse skin with water/shower. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. P305+P354+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 | 29071300 |
| Storage Class | 3 - Flammable liquids |
| WGK (Germany) | 2 |
Other Names
Related Products
Chemical Properties
- CAS Number
- 140-66-9
- EC Number
- 205-426-2
- Mol. Weight
- 206.32
- HS Code
- 29071300
- Category
- Organic Acids