7-bromo-3-methyl-1-benzothiophene CAS 17514-70-4
| CAS No. | 17514-70-4 |
| Molecular Formula | C9H7BrS |
| Molecular Weight | 227.12 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Owing to sulfur-containing functionality, bromine substitution, an aromatic ring system, 7-bromo-3-methyl-1-benzothiophene is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 227.12 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
7-bromo-3-methyl-1-benzothiophene (CAS 17514-70-4), molecular formula C9H7BrS and molecular weight 227.12 g/mol, is a CATO reference standard with documented purity and traceability.
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 | C9H7BrS |
| Molecular Weight | 227.12 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 |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1962 |
| Halogen Content | Br-containing |
| Sulfur Atoms | 1 |
Related bromo Standards
- 3-Bromo-2-methylbenzo[b]thiophene (CAS 10243-15-9)
- 2-Bromo-5-methylbenzo[b]thiophene (CAS 111860-00-5)
- 5-Bromo-3-methylbenzo[b]thiophene (CAS 1196-09-4)
- 4-Bromo-3-methylbenzo[b]thiophene (CAS 19075-35-5)
- 5-Bromo-7-methylbenzo[b]thiophene (CAS 19076-18-7)
- 7-Bromo-5-methylbenzo[b]thiophene (CAS 19076-19-8)
- 1-bromo-4-(prop-1-yn-1-ylsulfanyl)benzene (CAS 85143-29-9)
- 2-Bromo-3-methylbenzo[b]thiophene (CAS 5381-23-7)
Recommended Standards
- 1-(bromomethyl)-1-(methanesulfonylmethyl)cyclopropane (CAS 1423032-35-2)
- 4-Cyano-2-(difluoromethyl)-3-nitropyridine-5-carboxaldehyde (CAS 1804421-98-4)
- 4-(Bromomethyl)tetrahydro-2H-thiopyran 1,1-dioxide (CAS 1423029-10-0)
- 6-(Difluoromethyl)-2-formyl-3-nitroisonicotinonitrile (CAS 1804692-00-9)
- (E)-5-benzyl-2-hydroxybenzaldehyde oxime (CAS 1146296-45-8)
- tert-Butyl 5-amino-2,4-difluorobenzylcarbamate (CAS 1781879-88-6)
- 2,3-Difluoro-1-methyl-4-(trichloromethoxy)benzene (CAS 1404195-01-2)
- 4-n-Butylanisole-2,3,5,6-d4 (CAS 1219804-78-0)
- [1,3]Dioxolo[4',5':4,5]benzo[1,2-d]isoxazole (CAS 106253-12-7)
- 2-(2-fluoro-4-methylbenzenesulfonamido)acetic acid (CAS 1803595-47-2)
- Fluralaner Impurity N1 (CAS 1095275-07-2)
- 5-[(4-aminophenyl)methyl]-1,3-oxazolidin-2-one hydrochloride (CAS 139264-79-2)
- N-Benzyl-5-chloro-1-[(2,6-dichlorophenyl)methyl]-2-oxo-1,2-dihydropyridine-3-carboxamide (CAS 339023-96-0)
- endo-Ser39-Tirzepatide (CAS CATO-CPTD788935)
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