4-tert-Octylphenol
4-tert-Octylphenol (CAS 140-66-9) is a phenolic compound with the linear formula (CH3)3CCH2C(CH3)2C6H4OH and a molecular weight of 206.32 g/mol. This chemical serves as a valuable building block in organic synthesis and finds applications in various industrial processes. Its properties make it useful in the formulation of surfactants, resins, and other chemical intermediates. Tech Serve Solutions offers 4-tert-Octylphenol for research and industrial applications.
- IUPAC
- 4-(1,1,3,3-Tetramethylbutyl)phenol
- Synonyms
- 4-(1,1,3,3-Tetramethylbutyl)phenolp-tert-Octylphenol

Surfactant Intermediate
4-tert-Octylphenol is used in the synthesis of nonionic surfactants, which are employed in detergents, emulsifiers, and wetting agents across numerous industries.
Resin Production
It acts as a monomer or additive in the production of phenolic resins and other polymers, contributing to enhanced properties such as thermal stability and chemical resistance.
Chemical Synthesis Building Block
As an organic building block, it is utilised in the creation of more complex molecules, including pharmaceuticals, agrochemicals, and specialty chemicals.
Antioxidant and Stabilizer
Its phenolic structure allows it to function as an antioxidant or stabilizer in certain formulations, protecting materials from degradation.
| Molecular weight | 206.32 |
|---|---|
| Linear formula | (CH3)3CCH2C(CH3)2C6H4OH |
| Assay | 97% |
| Boiling point | 175 °C/30 mmHg(lit.) |
| Solubility | water: slightly soluble0.007 g/L at 20 °C |
| Melting point | 79-82 °C(lit.) |


Hazard statements
- H315Causes skin irritation
- H318Causes serious eye damage
- H410Very toxic to aquatic life with long-lasting effects
Precautionary statements
- P273Avoid release to the environment
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
- P501Dispose of contents and container per local regulations
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Transport (UN / ADR) | UN 3077 9 / PGIII |
| Water hazard class (WGK, DE) | 2 |
| Hazard codes (EU) | Xi,N |
| Risk statements (R) | 38-41-50/53 |
| Safety statements (S) | 26-39-60-61 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Gene Information | mouse ... Esr1(13982) |
|---|
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is 4-tert-Octylphenol primarily used for?
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4-tert-Octylphenol is primarily used as an intermediate in the synthesis of surfactants and phenolic resins, and as a building block in organic chemical synthesis.
What is the CAS number and molecular formula for 4-tert-Octylphenol?
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The CAS number for 4-tert-Octylphenol is 140-66-9, and its linear formula is (CH3)3CCH2C(CH3)2C6H4OH.
What grade and purity does Tech Serve Solutions supply for 4-tert-Octylphenol?
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Tech Serve Solutions supplies 4-tert-Octylphenol with an assay of 97%. We do not represent this product as USP, BP, or EP grade. Please consult our technical data sheet for specific details.
How should 4-tert-Octylphenol be handled safely?
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Handle 4-tert-Octylphenol with appropriate personal protective equipment, including a dust mask type N95 (US), eyeshields, and gloves. It is classified as Danger, causing skin irritation (H315) and serious eye damage (H318), and is harmful to aquatic life with long-lasting effects (H410). Ensure adequate ventilation and avoid release into the environment.
Is 4-tert-Octylphenol shipped internationally?
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Yes, Tech Serve Solutions is a specialist global supplier and exporter of chemicals, including 4-tert-Octylphenol, which can be packed and shipped internationally according to relevant regulations.
How can I request a sample or quote for 4-tert-Octylphenol?
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To request a sample or a quote for 4-tert-Octylphenol, please contact our sales department through the website or by phone, providing your specific requirements.
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