1,3-Dibromo-2-ethynylbenzene CAS 177094-74-5
| CAS No. | 177094-74-5 |
| Molecular Formula | C8H4Br2 |
| Molecular Weight | 259.93 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 1,3-Dibromo-2-ethynylbenzene.
1,3-Dibromo-2-ethynylbenzene (CAS 177094-74-5), molecular formula C8H4Br2 and molecular weight 259.93 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C8H4Br2, 1,3-Dibromo-2-ethynylbenzene contains bromine substitution, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 259.93 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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), 1,3-Dibromo-2-ethynylbenzene 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 | C8H4Br2 |
| Molecular Weight | 259.93 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, low volatility) |
| 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.) | 2007 |
| Halogen Content | Br-containing |
Related Dibromo Standards
- 1,3-Dibromo-5-ethynylbenzene (CAS 191846-86-3)
- 1,4-Dibromo-2-ethynylbenzene (CAS 856000-38-9)
- 2,4-Dibromo-1-ethynylbenzene (CAS 2143123-35-5)
- 2,3-Dibromo-3-methylbutanoic acid (CAS 80573-34-8)
- Methyl 2,3-dibromo-2-methylpropanoate (CAS 3673-79-8)
- Dibromo Malonamide (CAS 73003-80-2)
- Methyl 3,3-dibromo-2-oxopropanoate (CAS 5038-58-4)
- 2,5-Dibromo-3-methylthiophene (CAS 13191-36-1)
Recommended Standards
- Ethyl 2,3-dibromopropionate (CAS 3674-13-3)
- Methyl 2,4-dibromobutyrate (CAS 70288-65-2)
- 22262-60-8 3-Bromo-2-(bromomethyl)propionic Acid Methyl Ester M2066 Methyl 3-Bromo-2-(bromomethyl)propionate Methyl Bis(bromomethyl)acetate Methyl beta,beta'-Dibromoisobutyrate (CAS 22262-60-8)
- 1-Bromo-4-(bromoethynyl)benzene (CAS 934-94-1)
- 2-(1,2-Dimethyl-1h-indol-3-yl)ethan-1-ol (CAS 22129-71-1)
- 7-chloro-1-ethyl-1H-1,3-benzodiazole-2-carbaldehyde (CAS 1343356-00-2)
- 2-Iodophenylacetonitrile (CAS 40400-15-5)
- 3-(Piperidin-3-yl)benzamide (CAS 1044769-18-7)
- Levulinic Acid (CAS 123-76-2)
- Aflatoxin Q1 (CAS 52819-96-2)
- 3-((4-Chlorobenzyl)thio)-5H-[1,2,4]triazino[5,6-b]indole (CAS 309272-95-5)
- 7-Bromo-2-methyl-1,2,3,4-tetrahydroisoquinoline (CAS 258515-54-7)
- 5,6-dimethylpiperidine-2-carboxylic acid hydrochloride (CAS 1909309-75-6)
- Neuropeptide Y (1-24) amide (human, rat) (CAS 131448-51-6)
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