Cinnamic acid
Also known as: 3-Phenylacrylic acid, (2E)-3-Phenylprop-2-enoic acid, trans-Cinnamic acid, trans-β-Carboxystyrene, FEMA 2288, EINECS 205-398-1, MFCD00004369
Cinnamic acid (CAS 621-82-9) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C9H8O2 and a molecular weight of 148.159 g/mol. Key properties include a melting point of 133ºC, a boiling point of 265.0±0.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 189.5±9.6 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 621-82-9
- Jingsj CID
- J-39767-2
- Molecular Formula
- C9H8O2
- Molecular Weight
- 148.159 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 133ºC |
|---|---|
| Boiling Point | 265.0±0.0 °C at 760 mmHg |
| Density | 1.2±0.1 g/cm3 |
| Flash Point | 189.5±9.6 °C |
| Exact Mass | 148.052429 |
| PSA | 37.30000 |
| LogP | 2.41 |
| Vapor Pressure | 0.0±0.5 mmHg at 25°C |
| Refractive Index | 1.616 |
Activity & Biological Data
| Target | Human Endogenous Metabolite |
|---|---|
| Additional Information | [1]. Liu L, et al. Cinnamic acid: a natural product with potential use in cancer intervention. Int J Cancer. 1995 Jul 28;62(3):345-50. |
Customs & Trade Information
| HS Code | 2916399090 |
|---|---|
| Summary | 2916399090 other aromatic monocarboxylic acids, their anhydrides, halides, peroxides, peroxyacids and their derivatives VAT:17.0% Tax rebate rate:9.0% Supervision conditions:none MFN tariff:6.5% General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of Cinnamic acid?
The CAS number of Cinnamic acid is 621-82-9.
What are the molecular formula and molecular weight of Cinnamic acid?
Cinnamic acid has molecular formula C9H8O2 and molecular weight 148.159 g/mol.
What are the upstream and downstream products of Cinnamic acid?
For Cinnamic acid, Upstream Products: Cinnamyl alcohol, Iodobenzene, Acrylic acid; Downstream Products: 3,3-Diphenylpropanoic acid, 3-Phenyl-1-indanone, 3-Hydroxy-3-phenylpropanoic acid.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Cinnamic acid (CAS 621-82-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-39767-2 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.