3-Hydroxypyridin-4(1H)-one CAS 1121-23-9
| CAS No. | 1121-23-9 |
| Molecular Formula | C5H5NO2 |
| Molecular Weight | 111.10 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 111.10 g/mol gives 3-Hydroxypyridin-4(1H)-one distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
3-Hydroxypyridin-4(1H)-one (CAS 1121-23-9) is a high-purity analytical reference standard with the molecular formula C5H5NO2 and a molecular weight of 111.10 g/mol.
The molecular framework of 3-Hydroxypyridin-4(1H)-one (C5H5NO2) 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 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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), 3-Hydroxypyridin-4(1H)-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.
Physical & Chemical Properties
| Molecular Formula | C5H5NO2 |
| Molecular Weight | 111.10 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1957 |
| Nitrogen Atoms | 1 |
Related Hydroxypyridin Standards
- 2-Hydroxypyridin-4(1H)-one (CAS 29212-35-9)
- 5-Hydroxypyridin-2(1H)-one (CAS 5154-01-8)
- 6-Hydroxypyridin-2(1H)-one (CAS 84753-20-8)
- 2-(3-Hydroxypyridin-2-yl)acetonitrile (CAS 112372-20-0)
- 2-(5-Hydroxypyridin-2-yl)acetonitrile (CAS 1227590-88-6)
- 2-(5-Hydroxypyridin-3-yl)acetonitrile (CAS 99310-62-0)
- 1-(5-Hydroxypyridin-2-yl)ethanone (CAS 67310-56-9)
- 1-(5-Hydroxypyridin-3-yl)ethanone (CAS 910649-57-9)
Recommended Standards
- 3-Methyl-1H-pyrrole-2,5-dione (CAS 1072-87-3)
- 4-Amino-6-hydroxypyrimidine (CAS 1193-22-2)
- Pyridine-3,4-diol (CAS 10182-48-6)
- 1-(1,3-Oxazol-5-yl)ethanone (CAS 1263378-07-9)
- Butyl acrylate-styrene copolymer (CAS 25767-47-9)
- Bicyclo[2.2.1]heptane-2-carboxylic acid, 3-amino-,[1R-(exo,exo)]- (CAS 202280-03-3)
- (R)-Quinuclidine-2-carboxylic acid hydrochloride (CAS 94160-98-2)
- Rel-(1r,4r)-4-ethoxycyclohexan-1-amine (CAS 72342-87-1)
- (2,6-Difluoro-4-isopropoxyphenyl)boronic acid (CAS 2096337-66-3)
- Pirfenidone (CAS 53179-13-8)
- 6,6-Dimethyl-5-oxothiomorpholine-3-carboxylic acid (CAS 14226-94-9)
- 3-(4-Chlorophenyl)propane-1-sulfonyl chloride (CAS 239483-57-9)
- Cyclohexyl(3-methylthiophen-2-yl)methanamine (CAS 1250809-04-1)
- Tetrapeptide-3 (CAS 827306-97-8)
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