2-bromo-3-ethynyl-pyridine CAS 1028331-32-9
| CAS No. | 1028331-32-9 |
| Molecular Formula | C7H10BrN |
| Molecular Weight | 188.07 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
2-bromo-3-ethynyl-pyridine (CAS 1028331-32-9) is a high-purity analytical reference standard with the molecular formula C7H10BrN and a molecular weight of 188.07 g/mol.
Structurally, 2-bromo-3-ethynyl-pyridine (C7H10BrN) contains a nitrile group, bromine substitution. The molecule exhibits a degree of unsaturation (DBE) of 3.0, corresponding to approximately 3 ring(s) or double-bond equivalent(s). With a molecular weight of 188.07 g/mol, it falls into the medium-molecular-weight range. 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.
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 | C7H10BrN |
| Molecular Weight | 188.07 g/mol |
| Appearance | White to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1988 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 1 |
Related bromo Standards
- 2-Bromo-2-cyclopentylacetonitrile (CAS 1379452-42-2)
- 6-Bromo-6-heptenenitrile (CAS 148252-44-2)
- 2-Bromo-4-ethynylthiazole (CAS 1211520-19-2)
- 4-Bromo-2-ethynylthiazole (CAS 2284094-92-2)
- 1-Bromo-n-methylmethanesulfonamide (CAS 54114-55-5)
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Recommended Standards
- 1-(3-Bromopropyl)pyrrole (CAS 100779-91-7)
- 2-bromocyclohexane-1-carbonitrile (CAS 123804-87-5)
- 5,7-Dichloroindoline (CAS 70555-58-7)
- 4,7-Dichloro-2,3-dihydro-1h-indole (CAS 96129-78-1)
- 2-(Cinnolin-4-yl)acetic acid hydrochloride (CAS 1955530-83-2)
- 1-ethylpyrrolidine-3-carbaldehyde (CAS 1447949-48-5)
- 9-Bromo-2,3,6,7-tetrahydro-1H,5H-pyrido[3,2,1-ij]quinolin-5-one (CAS 57369-19-4)
- 3-Bromoquinoline-5-sulfonyl chloride (CAS 33768-83-1)
- 2-Chloro-6-iodo-5-(trifluoromethyl)isonicotinic acid (CAS 886761-93-9)
- tert-butyl 3-(hydroxymethyl)-2-methyl-2,3-dihydro-1H-indole-1-carboxylate (CAS 2736281-46-0)
- 1-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)but-3-en-1-amine 2,2,2-trifluoroacetate (CAS 208520-98-3)
- 1-(2-Bromoethoxy)-4-iodobenzene (CAS 54914-17-9)
- 2-[1-(Piperidin-1-yl)ethyl]-3,4-dihydroquinazolin-4-one (CAS 866009-94-1)
- Semaglutide Impurity 128 (CAS 2490269-78-6)
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