5-bromo-2,3-dihydropyran-4-one CAS 359688-89-4
| CAS No. | 359688-89-4 |
| Molecular Formula | C5H5BrO2 |
| Molecular Weight | 177.00 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C5H5BrO2, 5-bromo-2,3-dihydropyran-4-one contains a carboxylic acid group, a hydroxyl group, an ether linkage, bromine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 177.00 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
5-bromo-2,3-dihydropyran-4-one (CAS 359688-89-4), molecular formula C5H5BrO2 and molecular weight 177.00 g/mol, is a CATO reference standard with documented purity and traceability.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C5H5BrO2 |
| Molecular Weight | 177.00 g/mol |
| 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) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 2025 |
| Halogen Content | Br-containing |
Related bromo Standards
- 5-Bromo-3-methoxypyrazole (CAS 1015779-81-3)
- (3-Bromo-1H-pyrazol-1-yl)methanol (CAS 1039454-62-0)
- 3-Bromo-5,6-dihydropyran-2-one (CAS 104184-64-7)
- 4-Bromo-3-methoxy-1H-pyrazole (CAS 1147011-26-4)
- (2-Bromo-1h-imidazol-4-yl)methanol (CAS 1162674-62-5)
- 2-Bromo-3-hydroxycyclopent-2-en-1-one (CAS 1189352-96-2)
- 4-Bromo-5,6-dihydro-2H-pyran-2-one (CAS 124066-92-8)
- 4-Bromo-3-methyl-2,5-dihydro-1,2-oxazol-5-imine (CAS 1356635-81-8)
Recommended Standards
- 5-(Bromomethyl)furan-2(5H)-one (CAS 78508-87-9)
- 5-Bromo-2-methyl-2,4-dihydro-3H-pyrazol-3-one (CAS 623577-53-7)
- 5-(Bromomethyl)-3-methyl-1,2,4-oxadiazole (CAS 875644-71-6)
- 5-Bromo-3-methyl-2(5H)-furanone (CAS 51799-96-3)
- 5-Methyl-N-(3-nitrophenyl)furan-2-carboxamide (CAS 5925-67-7)
- 2-Chloro-N-ethyl-N-(m-tolyl)acetamide (CAS 86491-92-1)
- (S)-2-((1-(tert-Butoxycarbonyl)piperidin-3-yl)oxy)acetic acid (CAS 1354010-25-5)
- 5-Iodothiazol-2-amine (CAS 41731-32-2)
- 1-(2-(4-(3-Chloro-5-(trifluoromethyl)pyridin-2-yl)piperazin-1-yl)ethyl)urea (CAS 338792-95-3)
- Midazolam Impurity 41 (CAS 59468-85-8)
- 1-(3-Chlorophenyl)pentane-1,3-dione (CAS 1040034-67-0)
- (2S,4S)-8,9-diazatricyclo[4.3.0.0²⁴]nona-1(6),7-diene-7-carboxylic acid (CAS 1932401-47-2)
- 2-[(chloroacetyl)amino]-N-(2-furylmethyl)benzamide (CAS 117459-38-8)
- Neuropeptide SF (human) (CAS 192387-39-6)
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