7-Nitro-2,3-diphenylpyrido[2,3-b]pyrazine CAS 887571-86-0
| CAS No. | 887571-86-0 |
| Molecular Formula | C19H12N4O2 |
| Molecular Weight | 328.32 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
CATO supplies 7-Nitro-2,3-diphenylpyrido[2,3-b]pyrazine (CAS 887571-86-0), a certified reference material (molecular formula C19H12N4O2, MW 328.32 g/mol) for analytical method development and quality control.
Owing to a steroid core, an amide group, a hydroxyl group, an ether linkage, 7-Nitro-2,3-diphenylpyrido[2,3-b]pyrazine is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 328.32 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
As a certified reference material (CRM), 7-Nitro-2,3-diphenylpyrido[2,3-b]pyrazine meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C19H12N4O2 |
| Molecular Weight | 328.32 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 16.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Nitrogen Atoms | 4 |
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- tert-Butyl (5-ethynyl-2-methoxyphenyl)carbamate (CAS 1033610-19-3)
- Chlorotricarbonyl(4,4'-di-t-butyl-2,2'-bipyridine)rhenium(I) (CAS 165612-19-1)
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- Semaglutide impurity 257 (CAS CATO-C4X-2226257)
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