1,3-OXazole-4-carboxylic acid hydrochloride CAS 2055119-39-4
| CAS No. | 2055119-39-4 |
| Molecular Formula | C4H3NO3 |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 1,3-OXazole-4-carboxylic acid hydrochloride is closely related to an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
1,3-OXazole-4-carboxylic acid hydrochloride (CAS 2055119-39-4) is a high-purity analytical reference standard with the molecular formula C4H3NO3HCl and a molecular weight of 149.53 g/mol.
The molecular framework of 1,3-OXazole-4-carboxylic acid hydrochloride (C4H3NO3HCl) is characterized by an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution. 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. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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.
As a certified reference material (CRM), 1,3-OXazole-4-carboxylic acid hydrochloride 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 | C4H3NO3 HCl |
| Molecular Weight | 149.53 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1997 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
Related OXazole Standards
- Sodium oxazole-4-carboxylate (CAS 1017795-18-4)
- 5-methyl-1,3-oxazole-2-carbaldehyde (CAS 1030585-89-7)
- 3-methyl-1,2-oxazole-4-carbaldehyde (CAS 1064458-79-2)
- 4-methyl-1,2-oxazole-3-carbaldehyde (CAS 1083223-97-5)
- Oxazole-5-acetic Acid (CAS 1083337-90-9)
- 2-Ethyl-oxazole-4-carboxylic acid methyl ester (CAS 1126634-42-1)
- Oxazole-4-carbothioamide (CAS 118802-31-6)
- Oxazole-5-carbaldehyde (CAS 118994-86-8)
Recommended Standards
- Sodium naphthalene-1,5-disulfonate dihydrate (CAS 76758-30-0)
- (6-Fluoro-1H-indazol-4-yl)boronic acid (CAS 2409502-37-8)
- 3-(aminomethyl)-N,N-dimethylcinnolin-4-amine (CAS 1334148-46-7)
- 4-Amino-6-methylquinoline-3-carboxylic acid (CAS 359427-49-9)
- 4-Hydroxy-3-piperidin-1-ylmethyl-benzaldehydehydrochloride (CAS 1135194-46-5)
- 2-Fluoro-p-xylene (CAS 696-01-5)
- 1-(3-(Dimethylamino)propyl)-2,5-dimethyl-1H-pyrrole-3-carbaldehyde (CAS 932226-45-4)
- Tert-butyl (3R,4R)-3-(difluoromethyl)-4-(hydroxymethyl)pyrrolidine-1-carboxylate (CAS 2306247-07-2)
- 2-(4-Ethylpiperazin-1-yl)-5-(trifluoromethyl)aniline (CAS 937596-13-9)
- Semaglutide Impurity 1(OtBu-Ste-D-γGlu(OtBu)-AEEA-AEEA-OH) (CAS CATO-C4X-22261)
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