1,3-Oxazole-5-carbonyl chloride 118994-91-5 CAS 118994-91-5
| CAS No. | 118994-91-5 |
| Molecular Formula | C4H2ClNO2 |
| Molecular Weight | 131.52 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.
CATO supplies 1,3-Oxazole-5-carbonyl chloride 118994-91-5 (CAS 118994-91-5), a certified reference material (molecular formula C4H2ClNO2, MW 131.52 g/mol) for analytical method development and quality control.
Owing to an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, 1,3-Oxazole-5-carbonyl chloride 118994-91-5 is typically off-white to pale yellow liquid. Its solid-state physicochemical attributes — including a molecular weight of 131.52 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).
As a certified reference material (CRM), 1,3-Oxazole-5-carbonyl chloride 118994-91-5 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 | C4H2ClNO2 |
| Molecular Weight | 131.52 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1990 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
Related Oxazole Standards
- 1,3-Oxazole-4-carbonyl chloride (CAS 62348-20-3)
- 5-methyl-1,3-oxazole-2-carboxylic acid (CAS 45676-69-5)
- 5-ethyl-1,2-oxazole-3-carbaldehyde (CAS 1368365-43-8)
- Oxazole-4-carbothioamide (CAS 118802-31-6)
- 1,2-Oxazole-5-carbothioamide (CAS 175334-72-2)
- Oxazole-5-carbothioamide (CAS 885274-32-8)
- Oxazole-5-acetic Acid (CAS 1083337-90-9)
- Methyl oxazole-4-carboxylate (CAS 170487-38-4)
Recommended Standards
- 2-Chlorooxazole-4-carbaldehyde (CAS 1060816-36-5)
- 4-Chloro-1,3,5-triazin-2-ol (CAS 168075-30-7)
- 3149-74-4 Methane-d2, bromochloro- Bromochloromethane-d2 (CAS 3149-74-4)
- Trichloroethylene (CAS 79-01-6)
- 2-(2-((2S,3R)-2-Amino-3-hydroxybutanamido)acetamido)acetic acid (CAS 66592-75-4)
- 4-Fluoro-6-nitro-3-(1H)indazole carboxylic Acid (CAS 885522-59-8)
- 1,2-Bis(trifluoromethyl)-3,6-dibromobenzene (CAS 1806861-02-8)
- Ethyl p-tolylacetate (CAS 14062-19-2)
- Isoniazid Impurity 1 (CAS 25197-87-9)
- tert-Butyl 1-(5-(ethoxycarbonyl)-2-(methylthio)pyrimidin-4-yl)-3-oxo-1,4-diazaspiro[5.5]undecane-4-carboxylate (CAS 2170746-96-8)
- tert-Butyl 1,6-diazaspiro[3.3]heptane-1-carboxylate hydrochloride (CAS 2089314-86-1)
- 4-(1-Benzofuran-2-yl)pyrimidin-2-amine (CAS 1205744-92-8)
- 2,6-Bis(trimethylsilyl)-4h-cyclopenta[1,2-b:5,4-b']dithiophen-4-one (CAS 1187970-48-4)
- Semaglutide Impurity 14(Discontinued,See CPTD788307 ) (CAS CATO-C4X-222614)
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