trans-Urocanic acid
Also known as: (E)-3-(1H-imidazol-4-yl)acrylic acid, (2E)-3-(1H-imidazol-4-yl)prop-2-enoic acid, 4-Imidazoleacrylic acid, Urocanate
trans-Urocanic acid (CAS 3465-72-3) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C6H6N2O2 and a molecular weight of 138.124 g/mol. Key properties include a boiling point of 456.9±20.0 °C at 760 mmHg, a density of 1.4±0.1 g/cm3 and a flash point of 230.1±21.8 °C. It is listed by 2 suppliers, 1 of which publish reference prices, from 76.32 to 76.32 CNY per 5g. Record last updated Aug 21, 2026.
- CAS No.
- 3465-72-3
- Jingsj CID
- J-1956613-1
- Molecular Formula
- C6H6N2O2
- Molecular Weight
- 138.124 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
| Supplier | Purity / Pack | Base Price | Unit Price | Origin | |
|---|---|---|---|---|---|
In Stock | >98.0%(LC)(T) 5g | ¥381.60 | $11.42 /gBest ¥76.32/g CNY | CN China MOQ 5g | |
Made to Order | 98% 5g | - | - | CN China MOQ 5g | |
Made to Order | 98% 25g | - | - | CN China MOQ 25g |
Physicochemical Properties
| Boiling Point | 456.9±20.0 °C at 760 mmHg |
|---|---|
| Density | 1.4±0.1 g/cm3 |
| Flash Point | 230.1±21.8 °C |
| Exact Mass | 138.042923 |
| PSA | 65.98000 |
| LogP | 0.01 |
| Vapor Pressure | 0.0±1.2 mmHg at 25°C |
| Refractive Index | 1.674 |
| Storage Conditions | 2-8C |
Activity & Biological Data
| Target | Human Endogenous Metabolite |
|---|---|
| Additional Information | [1]. J Uksila, et al. Trans-urocanic acid, a natural epidermal constituent, inhibits human natural killer cell activity in vitro. Exp Dermatol. 1994 Apr;3(2):61-5. [2]. Kazuyo Kaneko, et al. cis-Urocanic acid enhances prostaglandin E2 release and apoptotic cell death via reactive oxygen species in human keratinocytes. J Invest Dermatol. 2011 Jun;131(6):1262-71. |
Customs & Trade Information
| HS Code | 2933290090 |
|---|---|
| Summary | 2933290090. other compounds containing an unfused imidazole ring (whether or not hydrogenated) in the structure. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0% |
Frequently Asked Questions
What is the CAS number of trans-Urocanic acid?
The CAS number of trans-Urocanic acid is 3465-72-3.
What are the molecular formula and molecular weight of trans-Urocanic acid?
trans-Urocanic acid has molecular formula C6H6N2O2 and molecular weight 138.124 g/mol.
Which suppliers offer trans-Urocanic acid?
2 supplier(s) listed; reference unit price ¥76.32–76.32 /g.
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-Urocanic acid (CAS 3465-72-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1956613-1 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.