1-Bromo-2-(4-methylphenyl)acetylene CAS 33491-05-3
| CAS No. | 33491-05-3 |
| Molecular Formula | C9H7Br |
| Molecular Weight | 195.06 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 1-Bromo-2-(4-methylphenyl)acetylene.
1-Bromo-2-(4-methylphenyl)acetylene (CAS 33491-05-3), molecular formula C9H7Br and molecular weight 195.06 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 1-Bromo-2-(4-methylphenyl)acetylene (C9H7Br) contains bromine substitution, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 6.0, corresponding to approximately 6 ring(s) or double-bond equivalent(s). With a molecular weight of 195.06 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.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), 1-Bromo-2-(4-methylphenyl)acetylene 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 | C9H7Br |
| Molecular Weight | 195.06 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-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) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1966 |
| Halogen Content | Br-containing |
Related Bromo Standards
- 3-bromo-5-isopropyl-1,2,4-oxadiazole (CAS 121562-07-0)
- 4-bromo-3-methoxy-1-methyl-1H-pyrazole (CAS 1350323-85-1)
- 1-Bromo-4-ethynyl-2-methylbenzene (CAS 1356958-34-3)
- 2-Bromo-4-ethynyl-1-methylbenzene (CAS 1601195-09-8)
- 1-Bromo-2-ethynyl-3-methylbenzene (CAS 1614232-39-1)
- 1-Bromo-2-(prop-2-yn-1-yl)benzene (CAS 182276-11-5)
- (4-bromo-1-methyl-1H-pyrazol-3-yl)methanol (CAS 915707-65-2)
- (5-bromo-1-methyl-1H-imidazol-2-yl)methanol (CAS 861362-06-3)
Recommended Standards
- 1-(Bromomethyl)-4-ethynylbenzene (CAS 351002-91-0)
- 1-Bromo-2-(prop-1-yn-1-yl)benzene (CAS 92672-77-0)
- 1-(Bromomethyl)-2-ethynylbenzene (CAS 211508-95-1)
- 1-Bromo-2-ethynyl-4-methylbenzene (CAS 2196194-33-7)
- 2,2-Diethoxy-N-ethylethanamine (CAS 69148-92-1)
- 3,4,4-trifluoropiperidine hydrochloride (CAS 1823315-47-4)
- (3-Amino-4,6-dimethylthieno[2,3-b]pyridin-2-yl)(4-phenylpiperazin-1-yl)methanone (CAS 692758-19-3)
- N-tert-Butyl-N,N-dimethylformamidine (CAS 23314-06-9)
- (5-Bromo-2-methoxyphenyl)(4-methylpiperazin-1-yl)methanone (CAS 899140-48-8)
- Methyl 3-methyl-2-(methylamino)benzoate (CAS 161616-72-4)
- Imatinib Impurity N13 (CAS 36747-64-5)
- Broussonetine A (CAS 173220-07-0)
- 2-Benzoyl-3-({[3-(trifluoromethyl)phenyl]sulfanyl}methyl)-1-benzofuran (CAS 338423-80-6)
- Acetyl tetrapeptide-3 (CAS 827306-88-7)
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