Coumalic acid
Also known as: 2-oxo-2H-pyran-5-carboxylic acid, 2-Pyrone-5-carboxylic acid, Cumalic Acid, 6-oxopyran-3-carboxylic acid, α-Pyrone-5-carboxylic acid
Coumalic acid (CAS 500-05-0) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C6H4O4 and a molecular weight of 140.094 g/mol. Key properties include a melting point of 203-205 °C (dec.)(lit.), a boiling point of 282.4±0.0 °C at 760 mmHg, a density of 1.5±0.1 g/cm3 and a flash point of 137.3±19.4 °C. It is listed by 2 suppliers, 1 of which publish reference prices, from 4.20 to 70.74 CNY. Record last updated Aug 21, 2026.
- CAS No.
- 500-05-0
- Jingsj CID
- J-30537-8
- Molecular Formula
- C6H4O4
- Molecular Weight
- 140.094 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
| Supplier | Purity / Pack | Base Price | Unit Price | Origin | |
|---|---|---|---|---|---|
In Stock | >97.0%(GC)(T) 100g | ¥420.00 | $0.63 /gBest ¥4.20/g CNY | CN China MOQ 100g | |
In Stock | >97.0%(GC)(T) 25g | ¥128.00 | $0.77 /g ¥5.12/g CNY | CN China MOQ 25g | |
In Stock | >97.0%(GC)(T) 5g | ¥353.70 | $10.59 /g ¥70.74/g CNY | CN China MOQ 5g |
Physicochemical Properties
| Melting Point | 203-205 °C (dec.)(lit.) |
|---|---|
| Boiling Point | 282.4±0.0 °C at 760 mmHg |
| Density | 1.5±0.1 g/cm3 |
| Flash Point | 137.3±19.4 °C |
| Exact Mass | 140.010956 |
| PSA | 67.51000 |
| LogP | -0.43 |
| Vapor Pressure | 0.0±1.2 mmHg at 25°C |
| Refractive Index | 1.577 |
Activity & Biological Data
| Additional Information | [1]. Smith LK, et, al. Flow synthesis of coumalic acid and its derivatization. Department of Chemistry. 2018, 3: 722-732. |
|---|
Frequently Asked Questions
What is the CAS number of Coumalic acid?
The CAS number of Coumalic acid is 500-05-0.
What are the molecular formula and molecular weight of Coumalic acid?
Coumalic acid has molecular formula C6H4O4 and molecular weight 140.094 g/mol.
Which suppliers offer Coumalic acid?
2 supplier(s) listed; reference unit price ¥4.20–70.74 /g.
What are the upstream and downstream products of Coumalic acid?
For Coumalic acid, Upstream Products: DL-Malic acid, L-(-)-Malic acid, Hydrogen bromide; Downstream Products: 4-Octylbenzoic acid, 4-(Phenoxymethyl)benzoic acid, alpha-pyrone.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Coumalic acid (CAS 500-05-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-30537-8 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.