3-Methylquinoxaline-2-carboxylic acid
Also known as: 3-Methyl-2-quinoxalinecarboxylic acid, 3-Methyl-quinoxaline-2-carboxylic acid, 3-Methylchinoxalin-2-carbonsaeure, 2-Methyl-3-carboxy-chinoxalin, MQCA, RCG-210, methylquinoxalinecarboxylic acid
3-Methylquinoxaline-2-carboxylic acid (CAS 74003-63-7) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C10H8N2O2 and a molecular weight of 188.183 g/mol. Key properties include a melting point of 168-170ºC, a boiling point of 347.1±37.0 °C at 760 mmHg, a density of 1.4±0.1 g/cm3 and a flash point of 163.7±26.5 °C. It is classified under GHS with signal word Warning and hazard statements H302 — Harmful if swallowed, H319 — Causes serious eye irritation and H335 — May cause respiratory irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 74003-63-7
- Jingsj CID
- J-1973261-7
- Molecular Formula
- C10H8N2O2
- Molecular Weight
- 188.183 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 168-170ºC |
|---|---|
| Boiling Point | 347.1±37.0 °C at 760 mmHg |
| Density | 1.4±0.1 g/cm3 |
| Flash Point | 163.7±26.5 °C |
| Exact Mass | 188.058578 |
| PSA | 63.08000 |
| LogP | 2.26 |
| Vapor Pressure | 0.0±0.8 mmHg at 25°C |
| Refractive Index | 1.673 |
| Storage Conditions | -20°C Freezer |
GHS Safety & Compliance
- H302 — Harmful if swallowed
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
Activity & Biological Data
| Additional Information | [1]. Keyu Zhang , et al. Cytotoxicity and Genotoxicity of 1,4-bisdesoxyquinocetone, 3-methylquinoxaline-2-carboxylic Acid (MQCA) in Human Hepatocytes. Res Vet Sci. 2012 Dec;93(3):1393-401. |
|---|
Customs & Trade Information
| HS Code | 2933990090 |
|---|---|
| Summary | 2933990090. heterocyclic compounds with nitrogen hetero-atom(s) only. 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 3-Methylquinoxaline-2-carboxylic acid?
The CAS number of 3-Methylquinoxaline-2-carboxylic acid is 74003-63-7.
What are the molecular formula and molecular weight of 3-Methylquinoxaline-2-carboxylic acid?
3-Methylquinoxaline-2-carboxylic acid has molecular formula C10H8N2O2 and molecular weight 188.183 g/mol.
Is 3-Methylquinoxaline-2-carboxylic acid hazardous?
3-Methylquinoxaline-2-carboxylic acid has GHS signal word Warning and hazard statements H302 — Harmful if swallowed; H319 — Causes serious eye irritation; H335 — May cause respiratory irritation.
What are the upstream and downstream products of 3-Methylquinoxaline-2-carboxylic acid?
For 3-Methylquinoxaline-2-carboxylic acid, Upstream Products: 3-Methyl-2-quinoxalinecarboxaldehyde, 2,3-Dimethylquinoxaline, Benzofuroxan.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "3-Methylquinoxaline-2-carboxylic acid (CAS 74003-63-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1973261-7 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.