7-Ethynyl-2H-pyrido[3,2-b][1,4]oxazin-3(4H)-one CAS 1824123-04-7
| CAS No. | 1824123-04-7 |
| Molecular Formula | C9H6N2O2 |
| Molecular Weight | 174.16 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 7-Ethynyl-2H-pyrido[3,2-b][1,4]oxazin-3(4H)-one 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.
7-Ethynyl-2H-pyrido[3,2-b][1,4]oxazin-3(4H)-one (CAS 1824123-04-7), molecular formula C9H6N2O2 and molecular weight 174.16 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage, 7-Ethynyl-2H-pyrido[3,2-b][1,4]oxazin-3(4H)-one is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 174.16 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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.
Physical & Chemical Properties
| Molecular Formula | C9H6N2O2 |
| Molecular Weight | 174.16 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (faint amine-like odor) |
| 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1995 |
| Nitrogen Atoms | 2 |
Related Ethynyl Standards
- 7-Ethynyl-1H-pyrido[2,3-b][1,4]oxazin-2(3H)-one (CAS 1824105-71-6)
- Methyl 4-ethynyl-3-methylbenzoate (CAS 123279-38-9)
- Methyl 3-ethynyl-4-methylbenzoate (CAS 1255099-13-8)
- 3-Ethynyl-1-(2,2,2-trifluoroethyl)-1h-pyrazole (CAS 1354704-44-1)
- Methyl 3-ethynyl-2-methylbenzoate (CAS 149654-03-5)
- 4-Ethynyl-1-methyl-3-(trifluoromethyl)pyrazole (CAS 1498364-87-6)
- 5-Ethynyl-1-methyl-3-trifluoromethyl-1h-pyrazole (CAS 1855889-41-6)
- 5-Ethynyl-2,4-dimethylbenzoic acid (CAS 1863238-98-5)
Recommended Standards
- 4-(Pyrazin-2-yl)pyrimidin-2-ol (CAS 1865421-59-5)
- 3-(Furan-2-yl)pyrazine-2-carbaldehyde (CAS 1823498-75-4)
- Cinnoline-7-carboxylic acid (CAS 1889426-85-0)
- 2-(1H-tetrazol-1-yl)benzaldehyde (CAS 1823366-31-9)
- n-Butyl-3,4-difluoroaniline (CAS 1019622-22-0)
- [3-(4-Fluorophenyl)-5-methyl-7-oxo-7H-furo[3,2-g]chromen-6-yl]acetic acid (CAS 664366-13-6)
- (3R,4S)-4-ethylpyrrolidine-3-carboxylic acid hydrochloride (CAS 1821826-29-2)
- 3-(3-cyclopropyl-1,2,4-oxadiazol-5-yl)propanoic acid (CAS 1152530-78-3)
- 2-(2-Bromothiazol-5-yl)acetonitrile (CAS 1246554-99-3)
- 3,4-Dimethylbenzothioamide (CAS 58952-03-7)
- 2-(3-Pyridyl)-1,3,4-oxadiazole, 97% (CAS 65943-95-5)
- 1H-pyrrolo[3,2-b]pyridin-6-amine hydrochloride (CAS 1354940-93-4)
- N-Methyl-N-ethylacetamide（mixture of isomers） (CAS 38806-26-7)
- Semaglutide Impurity 160 (x TFA Salt) (CAS CATO-C4X-2226160)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com