4-(2,5-Dioxo-2,5-dihydro-1H-pyrrol-1-yl)-2-hydroxybenzoic acid CAS 19232-43-0
| CAS No. | 19232-43-0 |
| Molecular Formula | C11H7NO5 |
| Molecular Weight | 233.18 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
4-(2,5-Dioxo-2,5-dihydro-1H-pyrrol-1-yl)-2-hydroxybenzoic acid (CAS 19232-43-0) is a high-purity analytical reference standard with the molecular formula C11H7NO5 and a molecular weight of 233.18 g/mol.
Based on its molecular formula C11H7NO5, 4-(2,5-Dioxo-2,5-dihydro-1H-pyrrol-1-yl)-2-hydroxybenzoic acid contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 233.18 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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).
As a certified reference material (CRM), 4-(2,5-Dioxo-2,5-dihydro-1H-pyrrol-1-yl)-2-hydroxybenzoic acid 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 | C11H7NO5 |
| Molecular Weight | 233.18 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 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) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1962 |
| Nitrogen Atoms | 1 |
Related Dioxo Standards
- 2-(2,5-Dioxo-2,5-dihydro-1h-pyrrol-1-yl)-5-hydroxybenzoic acid (CAS 1306080-20-5)
- 4-(3,5-Dioxo-4,5-dihydro-1,2,4-triazin-2(3H)-yl)benzoic acid (CAS 18510-65-1)
- 3,5-dioxo-2-phenyl-2,3,4,5-tetrahydro-1,2,4-triazine-6-carboxylic acid (CAS 4315-71-3)
- 2-(5-methyl-1,3-dioxo-1,3-dihydro-2H-isoindol-2-yl)propanoic acid (CAS 1087784-06-2)
- 1-Ethyl-2,4-dioxo-1,2,3,4-tetrahydroquinoline-3-carboxylic acid (CAS 146828-47-9)
- 4-(3-Methyl-2,5-dioxo-pyrrolidin-1-yl)-benzoic acid (CAS 157928-79-5)
- 2-(5-Ethyl-2,3-dioxo-2,3-dihydro-1h-indol-1-yl)acetic acid (CAS 19612-79-4)
- 2-(1,3-Dioxo-1,3-dihydro-2H-isoindol-2-yl)-butanoic acid (CAS 35340-62-6)
Recommended Standards
- 5-(4-Nitrophenyl)-1H-pyrazole-3-carboxylic acid (CAS 189083-63-4)
- 1-(4-Nitrophenyl)-1h-pyrazole-3-carboxylic acid (CAS 19532-43-5)
- 1-((4-Nitrophenyl)amino)-1H-pyrrole-2,5-dione (CAS 20970-39-2)
- 6-Hydroxy-2-(4-nitrophenyl)pyrimidin-4(3H)-one (CAS 176100-76-8)
- 2-(5-Methoxypyridin-3-yl)acetic acid (CAS 1000542-94-8)
- (3-Hydroxy-1-pyrrolidinyl)(4-piperidinyl)-methanone hydrochloride (CAS 1220039-08-6)
- 6-(((4-Chlorophenyl)thio)methyl)-2-mercaptopyrimidin-4-ol (CAS 354538-71-9)
- 5-Fluoro-2-(2-methoxyethoxy)aniline (CAS 946683-70-1)
- 3-(2,2-Dimethoxyethyl)isoxazol-4-amine (CAS 87149-79-9)
- 3-Benzamido-N-[(4-fluorophenyl)methyl]thiophene-2-carboxamide (CAS 439120-54-4)
- 2-[4-(3-chlorophenyl)piperazin-1-yl]acetonitrile (CAS 25178-91-0)
- 1-(5-Nitropyridin-2-yl)piperidin-3-ol (CAS 88374-36-1)
- Tert-butyl 3-(4-bromo-1-methyl-1H-pyrazol-5-yl)piperidine-1-carboxylate (CAS 1401304-41-3)
- Liraglutide(14-22)TFA Salt (CAS CATO-C4X-199212)
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