Methyl 6-quinoxalinecarboxylate
Methyl 6-quinoxalinecarboxylate (CAS 23088-23-5) is a nitrogen-containing heterocyclic building block, the methyl ester of quinoxaline-6-carboxylic acid. Its molecular formula is C10H8N2O2 with a molar mass of 188.18 g/mol, and it is a crystalline solid melting at about 97-101 °C. Supplied at 97% assay, it serves chiefly as an intermediate in chemical synthesis and medicinal-chemistry research, where the quinoxaline scaffold and reactive ester support onward functionalisation. Tech Serve Solutions supplies it to research and manufacturing laboratories worldwide.
- IUPAC
- 6-Quinoxalinecarboxylic acid methyl ester,Methyl quinoxaline-6-carboxylate
- Synonyms
- Methyl 6-quinoxalinecarboxylateMethyl quinoxaline-6-carboxylate6-Quinoxalinecarboxylic acid methyl esterQuinoxaline-6-carboxylic acid methyl ester

Heterocyclic building block
Used as a quinoxaline scaffold in chemical synthesis, providing a fused bicyclic core for the construction of more complex nitrogen heterocycles.
Pharmaceutical intermediate
Serves as an intermediate in medicinal-chemistry and discovery programmes, where the quinoxaline ring is a recognised motif for assembling candidate molecules.
Ester functionalisation
The methyl carboxylate offers a convenient handle for hydrolysis, amidation, reduction or transesterification, enabling further derivatisation of the quinoxaline framework.
Laboratory reagent for research
Employed in academic and industrial laboratories for method development and structure-activity studies built around the quinoxaline-6-carboxylate unit.
| Molecular weight | 188.18 |
|---|---|
| Empirical formula | C10H8N2O2 |
| Assay | 97% |
| Melting point | 97-101 °C |

Hazard statements
- H315Causes skin irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38 |
| Safety statements (S) | 26-36/37 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Methyl 6-quinoxalinecarboxylate used for?
+
It is used principally as a heterocyclic building block and intermediate in chemical synthesis. The quinoxaline scaffold and the reactive methyl ester make it useful in medicinal-chemistry research and for preparing more elaborate nitrogen heterocycles. Tech Serve Solutions supplies it for research and manufacturing use, not for clinical or consumer application.
What is the CAS number and molecular formula of Methyl 6-quinoxalinecarboxylate?
+
The CAS number is 23088-23-5 and the molecular formula is C10H8N2O2, corresponding to a molecular weight of 188.18 g/mol. It is also known as methyl quinoxaline-6-carboxylate or 6-quinoxalinecarboxylic acid methyl ester.
What grade and purity does Tech Serve Solutions supply?
+
Tech Serve Solutions supplies Methyl 6-quinoxalinecarboxylate at a typical assay of 97% as a research and synthesis-grade material. It is a crystalline solid melting at approximately 97-101 °C. We do not represent it as USP, BP or EP pharmacopoeia grade. A certificate of analysis can be provided with each batch on request.
What are the safety and handling precautions for Methyl 6-quinoxalinecarboxylate?
+
It carries GHS07 with the signal word Warning. The hazard statements are H315 (causes skin irritation) and H335 (may cause respiratory irritation); avoid breathing dust (P261). Handle with eye protection, gloves and an N95-type dust mask in a well-ventilated area. It is classified WGK 3 (highly hazardous to water in Germany), so prevent release to drains and the environment. Always consult the Safety Data Sheet before use.
How is Methyl 6-quinoxalinecarboxylate packed, shipped and exported?
+
It is packed as a solid in tightly sealed, labelled containers sized to the order, from gram quantities to larger research lots, with packaging suited to safe transport. Tech Serve Solutions exports worldwide with full documentation, including the Safety Data Sheet and certificate of analysis. Packaging and shipping mode are confirmed at the time of enquiry.
How do I request a sample or quote?
+
Contact Tech Serve Solutions with your required quantity, purity and destination, and our team will respond with availability, lead time and a formal quotation. Samples can be arranged where appropriate to support evaluation and qualification.
▶ Related products

4-Amino-2-chloropyridine
C5H5ClN2
Heterocyclic Building Blocks
4-Ethynyl-1-methyl-1H-pyrazole
C6H6N2
Heterocyclic Building Blocks
4-Hydroxyquinoline-3-carboxylic acid ethyl ester
C12H11NO3
Heterocyclic Building Blocks
4-isocyanatopyridine
C6H4N2O
Heterocyclic Building Blocks
5-Chloro-2,8-dimethylquinoline
Heterocyclic Building Blocks

5-Chloro-2-methylene-1,3,3-trimethylindoline
Heterocyclic Building Blocks

5-Chloro-2-thiophenecarbonitrile
Heterocyclic Building Blocks

5-ethynyl-1H-pyrazole
C5H4N2
Heterocyclic Building Blocks▶ Explore more

3-Methyl-1,5-di-p-tolyl-1,4-pentazadiene
Chemical Synthesis

3-Methyl-1,5-pentanediol
Chemical Synthesis

3-Methyl-1-(2-methylphenyl)-1H-pyrazol-5-amine
C11H13N3
Chemical Synthesis
3-Methyl-1-(3′-sulfoamidophenyl)-5-pyrazolone
C10H11N3O3S
Chemical Synthesis