4-Ethylphenyl isocyanate
异氰酸4-乙基苯酯
Also known as: 1-ethyl-4-isocyanatobenzene, 1-ethyl-4-isocyanato-benzene, p-ethylphenyl isocyanate, 4-ethylphenyl isocyanate-98%, Isocyanic Acid 4-Ethylphenyl Ester, MFCD00013881, EINECS 245-446-9
4-Ethylphenyl isocyanate (CAS 23138-50-3) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C9H9NO and a molecular weight of 147.17400 g/mol. It is also known as 1-ethyl-4-isocyanatobenzene, 1-ethyl-4-isocyanato-benzene and p-ethylphenyl isocyanate. Key properties include a boiling point of 68ºC (1 torr), a density of 1.024 g/mL at 25 °C(lit.) and a flash point of 71.7ºC. GHS signal word: Warning. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 23138-50-3
- Jingsj CID
- J-47657-9
- Molecular Formula
- C9H9NO
- Chinese Name
- 异氰酸4-乙基苯酯
- Molecular Weight
- 147.17400 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 68ºC (1 torr) |
|---|---|
| Density | 1.024 g/mL at 25 °C(lit.) |
| Flash Point | 71.7ºC |
GHS Safety & Compliance
Frequently Asked Questions
What is the CAS number of 4-Ethylphenyl isocyanate?
The CAS number of 4-Ethylphenyl isocyanate is 23138-50-3.
What are the molecular formula and molecular weight of 4-Ethylphenyl isocyanate?
4-Ethylphenyl isocyanate has molecular formula C9H9NO and molecular weight 147.17400 g/mol.
Is 4-Ethylphenyl isocyanate hazardous?
4-Ethylphenyl isocyanate has GHS signal word Warning.
Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "4-Ethylphenyl isocyanate (CAS 23138-50-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-47657-9 (accessed 2026-10-23).
Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.