trans-Cinnamic acid
Also known as: (E)-3-phenylprop-2-enoic acid, (2E)-3-phenylacrylic acid, 3-phenylacrylic acid, Cinnamic acid, trans-3-Phenylacrylic acid, beta-Phenylacrylic acid, Phenylacrylic acid
trans-Cinnamic acid (CAS 140-10-3) 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 133 °C(lit.), 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. It is classified under GHS with signal word Warning and hazard statements H315 — Causes skin irritation, H319 — Causes serious eye irritation and H335 — May cause respiratory irritation. It is listed by 1 supplier, from 0.56 to 4.00 CNY. Record last updated Aug 21, 2026.
- CAS No.
- 140-10-3
- Jingsj CID
- J-18637-5
- Molecular Formula
- C9H8O2
- Molecular Weight
- 148.159 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
| Supplier | Purity / Pack | Base Price | Unit Price | Origin | |
|---|---|---|---|---|---|
In Stock | 99% 500g | ¥280.00 | $0.08 /gBest ¥0.56/g CNY | CN China MOQ 500g | |
In Stock | 99% 100g | ¥75.00 | $0.11 /g ¥0.75/g CNY | CN China MOQ 100g | |
In Stock | 99% 25g | ¥20.00 | $0.12 /g ¥0.80/g CNY | CN China MOQ 25g |
Physicochemical Properties
| Melting Point | 133 °C(lit.) |
|---|---|
| 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 |
| Additional Property | 0.4 g/L (20 ºC) |
GHS Safety & Compliance
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
Activity & Biological Data
| Target | Bacterial[1] |
|---|---|
| Additional Information | [1]. Yilmaz S, et al. Antimicrobial activity of trans-cinnamic acid and commonly used antibiotics against important fish pathogens and nonpathogenic isolates. J Appl Microbiol. 2018 Sep 4. |
Customs & Trade Information
| HS Code | 29163900 |
|---|
Frequently Asked Questions
What is the CAS number of trans-Cinnamic acid?
The CAS number of trans-Cinnamic acid is 140-10-3.
What are the molecular formula and molecular weight of trans-Cinnamic acid?
trans-Cinnamic acid has molecular formula C9H8O2 and molecular weight 148.159 g/mol.
Which suppliers offer trans-Cinnamic acid?
1 supplier(s) listed; reference unit price ¥0.56–4.00 /g.
Is trans-Cinnamic acid hazardous?
trans-Cinnamic acid has GHS signal word Warning and hazard statements H315 — Causes skin irritation; H319 — Causes serious eye irritation; H335 — May cause respiratory irritation.
What are the upstream and downstream products of trans-Cinnamic acid?
For trans-Cinnamic acid, Upstream Products: Bromobenzene, Acrylic acid, Iodobenzene; Downstream Products: Captamine, 3-Phenyl-1-indanone, 3,3-Diphenylpropanoic 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. "trans-Cinnamic acid (CAS 140-10-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-18637-5 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.