5-Ethynyl-2-nitrophenol CAS 928780-90-9
| CAS No. | 928780-90-9 |
| Molecular Formula | C8H5NO3 |
| Molecular Weight | 163.13 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 5-Ethynyl-2-nitrophenol 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.
5-Ethynyl-2-nitrophenol (CAS 928780-90-9) is a high-purity analytical reference standard with the molecular formula C8H5NO3 and a molecular weight of 163.13 g/mol.
The molecular framework of 5-Ethynyl-2-nitrophenol (C8H5NO3) is characterized by an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C8H5NO3 |
| Molecular Weight | 163.13 g/mol |
| Appearance | Off-white to pale 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 methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Nitrogen Atoms | 1 |
Related Ethynyl Standards
- 3-Ethynyl-5-nitropyridin-2-amine (CAS 1202474-63-2)
- 3-Ethynyl-4-nitrophenol (CAS 1260790-65-5)
- 3-Ethynyl-5-nitropyridin-4-amine (CAS 1824206-14-5)
- 2-Ethynyl-3-nitropyridin-4-amine (CAS 1851876-98-6)
- 6-Ethynyl-2-nitropyridin-3-amine (CAS 1876987-31-3)
- 2-Ethynyl-4-nitrophenol (CAS 885951-98-4)
- 4-Ethynyl-2-nitrophenol (CAS 70239-81-5)
- 4-Ethynyl-2,3-difluorobenzonitrile (CAS 175283-25-7)
Recommended Standards
- 5-Amino-2-nitrobenzonitrile (CAS 72115-08-3)
- 5-Formyl-2,3-dihydroxybenzonitrile (CAS 28911-18-4)
- 5-(Pyridin-4-yl)-1,3,4-oxadiazol-2-ol (CAS 2845-82-1)
- 5-Hydroxyisoindoline-1,3-dione (CAS 50727-06-5)
- (E)-3-(2-Methylpyrimidin-4-yl)acrylic acid (CAS 1092299-26-7)
- Ethyl 3-ethyl-2-oxotetrahydrofuran-3-carboxylate (CAS 82672-09-1)
- 6-Iodonicotinaldehyde (CAS 817618-55-6)
- 1346601-04-4 Pyrene-13C6 (CAS 1346601-04-4)
- 2-Chloro-5-nitrobenzenesulfonamide (CAS 96-72-0)
- N'-(thieno[2,3-b]quinoline-2-carbonyl)methanesulfonohydrazide (CAS 692260-15-4)
- 1-Trityl-4-vinyl-1H-imidazole (CAS 86803-29-4)
- benzyl (2R,3R)-3-Amino-2-methylpiperidine-1-carboxylate (CAS 1044641-49-7)
- ((Benzo[d]thiazol-2-ylsulfinyl)methyl)diphenylphosphine oxide (CAS 1028454-88-7)
- Peptide 439 (CAS CATO-CPTD788439)
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