octadecanal
Also known as: 1-Octadecanal, 1-Octadecanone, EINECS 211-346-9, Octadecanal, Octadecanaldehyde, Octadecyl Aldehyde, Stearaldehyde, Stearyl Aldehyde, n-Octadecanal, NSC 68100, Stearyl aldehyde, stearic aldehyde
octadecanal (CAS 638-66-4) is a compound in the Aliphatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C18H36O and a molecular weight of 268.47800 g/mol. Key properties include a melting point of 46 °C, a boiling point of 321.3ºC at 760 mmHg, a density of 0.831g/cm3 and a flash point of 154.5ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 638-66-4
- Jingsj CID
- J-1971839-8
- Molecular Formula
- C18H36O
- Molecular Weight
- 268.47800 g/mol
- Category
- Aliphatic Hydrocarbons
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 46 °C |
|---|---|
| Boiling Point | 321.3ºC at 760 mmHg |
| Density | 0.831g/cm3 |
| Flash Point | 154.5ºC |
| Exact Mass | 268.27700 |
| PSA | 17.07000 |
| LogP | 6.44680 |
| Refractive Index | 1.443 |
Activity & Biological Data
| Target | Human Endogenous Metabolite |
|---|---|
| Additional Information | [1]. H.K.Gardner, et al. Identification and Quantitation of Hexadecanal and Octadecanal in Broiler Muscle Phospholipids. Poultry Science, 1972 May 1; 51(3):1056-1058. |
Customs & Trade Information
| HS Code | 2912190090 |
|---|---|
| Summary | 2912190090 acyclic aldehydes without other oxygen function。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。MFN tariff:5.5%。General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of octadecanal?
The CAS number of octadecanal is 638-66-4.
What are the molecular formula and molecular weight of octadecanal?
octadecanal has molecular formula C18H36O and molecular weight 268.47800 g/mol.
What are the upstream and downstream products of octadecanal?
For octadecanal, Upstream Products: Stearic acid, 1-Octadecanol, Stearoyl chloride; Downstream Products: Tristearin, N-Octadecylurea, Glycerol.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "octadecanal (CAS 638-66-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1971839-8 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.