4-tert-Octylphenol
Also known as: 4-(1,1,3,3-Tetramethylbutyl)phenol, 4-(2,4,4-Trimethylpentan-2-yl)phenol, p-tert-Octylphenol, t-Octylphenol, tert-Octylphenol, Phenol, 4-(1,1,3,3-tetramethylbutyl)-, Para-tert-octylphenol, PTOP
4-tert-Octylphenol (CAS 140-66-9) is a compound in the Alcohols category listed in the Jingsj chemical database. It has the molecular formula C14H22O and a molecular weight of 206.324 g/mol. Key properties include a melting point of 79-82 °C(lit.), a boiling point of 282.3±0.0 °C at 760 mmHg, a density of 0.9±0.1 g/cm3 and a flash point of 148.3±8.2 °C. It is classified under GHS with signal word Danger and hazard statements H225 — Highly flammable liquid and vapour, H319 — Causes serious eye irritation and H336 — May cause drowsiness or dizziness. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 140-66-9
- Jingsj CID
- J-44212-3
- Molecular Formula
- C14H22O
- Molecular Weight
- 206.324 g/mol
- Category
- Alcohols
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 79-82 °C(lit.) |
|---|---|
| Boiling Point | 282.3±0.0 °C at 760 mmHg |
| Density | 0.9±0.1 g/cm3 |
| Flash Point | 148.3±8.2 °C |
| Exact Mass | 206.167068 |
| PSA | 20.23000 |
| LogP | 4.93 |
| Vapor Pressure | 0.0±0.6 mmHg at 25°C |
| Refractive Index | 1.501 |
GHS Safety & Compliance
- H225 — Highly flammable liquid and vapour
- H319 — Causes serious eye irritation
- H336 — May cause drowsiness or dizziness
Activity & Biological Data
| Target | Human Endogenous Metabolite |
|---|---|
| Additional Information | [1]. Dinh Nam Tran, et al. 4-tert-Octylphenol Exposure Disrupts Brain Development and Subsequent Motor, Cognition, Social, and Behavioral Functions. Oxidative Medicine and Cellular Longevity, 2020. |
Customs & Trade Information
| HS Code | 2907139000 |
|---|---|
| Summary | 2907139000 3-octylphenol。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。Lowest tariff:5.5%。General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of 4-tert-Octylphenol?
The CAS number of 4-tert-Octylphenol is 140-66-9.
What are the molecular formula and molecular weight of 4-tert-Octylphenol?
4-tert-Octylphenol has molecular formula C14H22O and molecular weight 206.324 g/mol.
Is 4-tert-Octylphenol hazardous?
4-tert-Octylphenol has GHS signal word Danger and hazard statements H225 — Highly flammable liquid and vapour; H319 — Causes serious eye irritation; H336 — May cause drowsiness or dizziness.
What are the upstream and downstream products of 4-tert-Octylphenol?
For 4-tert-Octylphenol, Upstream Products: 2,4,4-Trimethylpent-1-ene, Phenol, 2,4,4-Trimethyl-2-pentanol; Downstream Products: 4-tert-Butylphenol, 2,4-Di-tert-butylphenol, Phenol.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "4-tert-Octylphenol (CAS 140-66-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-44212-3 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.