5-Bromo-2H-pyran-2-one CAS 19978-33-7
Purity 97%+In StockPharmaceutical Standards
| CAS No. | 19978-33-7 |
| Molecular Formula | C5H3BrO2 |
| Molecular Weight | 174.98 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies 5-Bromo-2H-pyran-2-one (CAS 19978-33-7), a pharmaceutical standards reference standard manufactured under ISO 17034 accreditation. Molecular formula: C5H3BrO2. Molecular weight: 174.98 g/mol. Batch-specific COA and technical support are available on request.
Physical & Chemical Properties
| Molecular Formula | C5H3BrO2 |
| Molecular Weight | 174.98 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1962 |
| Halogen Content | Br-containing |
Related Bromo Standards
- 6- Bromo-4(1H) -pyrimidinone (CAS 1086382-38-8)
- 2-Bromo-5-hydroxypyrimidine (CAS 1240621-87-7)
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- 3-Bromo-1H-pyrazole-4-carbaldehyde (CAS 1936134-18-7)
- 3-Bromo-2H-pyran-2-one (CAS 19978-32-6)
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Recommended Standards
- 5-Bromo-4(3H)-pyrimidone (CAS 19808-30-1)
- 5-Bromofuran-3-carbaldehyde (CAS 63387-54-2)
- 5-(Bromomethylene)furan-2(5H)-one (CAS 199744-38-2)
- Ethyl 3-((5,8-difluoroquinolin-4-yl)amino)benzoate (CAS 1315370-69-4)
- 4-(Difluoromethyl)-5-iodo-3-(trifluoromethyl)picolinaldehyde (CAS 1805600-51-4)
- (3-Fluoro-5-(4-methylpiperazin-1-yl)phenyl)boronic acid (CAS 1704073-49-3)
- B-carboline-3-carboxylicacidmethylester (CAS 69954-48-9)
- Methyl 5-({[(tert-butoxy)carbonyl]amino}methyl)piperidine-2-carboxylate (CAS 1291351-83-1)
- Beclomethasone Dipropionate-d10 (CAS CATO-CCAD301383)
- Semaglutide impurity 30 (CAS CATO-C4X-222630)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
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- Technical support: +86 13829788188 / jacky.chen@cato-chem.com