6,7-Dimethyl-2,3-di(2-pyridyl)quinoxaline
6,7-Dimethyl-2,3-di(2-pyridyl)quinoxaline (CAS 6627-38-9) is a heterocyclic compound with the molecular formula C20H16N4 and a molecular weight of 312.37 g/mol. This quinoxaline derivative is primarily utilised as a building block in chemical synthesis. Its distinct chemical structure makes it valuable in research and development for creating more complex molecules, particularly within heterocyclic chemistry and potentially for investigating pharmaceutical compounds.
- Synonyms
- 6627-38-9C20H16N4

Internal Standard in Pharmacokinetic Studies
6,7-Dimethyl-2,3-di(2-pyridyl)quinoxaline has been employed as an internal standard for investigating the clinical pharmacokinetics of nelfinavir mesylate, an inhibitor of HIV-1 protease. This application highlights its utility in analytical chemistry and drug metabolism research.
Heterocyclic Building Block
As a member of the quinoxaline family, this compound serves as a valuable building block for organic synthesis. It facilitates the construction of novel heterocyclic compounds, contributing to advancements in medicinal chemistry and materials science.
Chemical Synthesis Research
The compound is suitable for general chemical synthesis applications, allowing researchers to explore new reaction pathways and develop innovative synthetic methodologies. Its defined structure is advantageous for precise chemical transformations.
| Molecular weight | 312.37 |
|---|---|
| Empirical formula | C20H16N4 |
| Assay | 98% |
| Application | 6,7-Dimethyl-2,3-di-(2-pyridyl)quinoxaline has been used as an internal standard to investigate the clinical pharmacokinetics of nelfinavir mesylate, a potent inhibitor of HIV-1 protease1. |
| Melting point | 191-193 °C(lit.) |

Hazard statements
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| 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) | 26-37/39 |
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 6,7-Dimethyl-2,3-di(2-pyridyl)quinoxaline used for?
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6,7-Dimethyl-2,3-di(2-pyridyl)quinoxaline is used as a building block in chemical synthesis and has been employed as an internal standard in pharmacokinetic studies.
What are the CAS number and formula for this compound?
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The CAS number is 6627-38-9 and the empirical formula (Hill notation) is C20H16N4.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 6,7-Dimethyl-2,3-di(2-pyridyl)quinoxaline with an assay of 98%. We do not represent this product as USP, BP, EP, or any pharmacopoeia grade.
How should 6,7-Dimethyl-2,3-di(2-pyridyl)quinoxaline be handled?
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This compound is a warning substance that may cause skin irritation (H315), serious eye irritation (H319), and respiratory irritation (H335). Handle with appropriate personal protective equipment including a dust mask type N95 (US), eyeshields, and gloves. Ensure adequate ventilation.
Is this chemical controlled or scheduled?
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Based on the provided data, there is no indication that 6,7-Dimethyl-2,3-di(2-pyridyl)quinoxaline is a controlled or scheduled substance.
How is this chemical packed, shipped, and exported?
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Tech Serve Solutions offers this chemical in various packing sizes suitable for laboratory and industrial use. We are experienced global exporters of fine chemicals, adhering to all necessary shipping and export regulations.
How can I request a sample or quote?
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To request a sample or a quote for 6,7-Dimethyl-2,3-di(2-pyridyl)quinoxaline, please contact our sales team through the website or by phone, providing your specific requirements.
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