4-Bromo-1-methyl-2-(methylsulfonyl)benzene CAS 254887-17-7
| CAS No. | 254887-17-7 |
| Molecular Formula | C8H9BrO2S |
| Molecular Weight | 249.12 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 4-Bromo-1-methyl-2-(methylsulfonyl)benzene 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.
4-Bromo-1-methyl-2-(methylsulfonyl)benzene (CAS 254887-17-7), molecular formula C8H9BrO2S and molecular weight 249.12 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 4-Bromo-1-methyl-2-(methylsulfonyl)benzene (C8H9BrO2S) contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, bromine substitution, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 4.0, corresponding to approximately 4 ring(s) or double-bond equivalent(s). With a molecular weight of 249.12 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.
Physical & Chemical Properties
| Molecular Formula | C8H9BrO2S |
| Molecular Weight | 249.12 g/mol |
| Purity | 97%+ |
| Storage | Store at room temperature, 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) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Halogen Content | Br-containing |
| Sulfur Atoms | 1 |
Related Bromo Standards
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Recommended Standards
- 4,6-Dimethyl-5-(tetramethyl-1,3,2-dioxaborolan-2-yl)pyrimidin-2-amine (CAS 2377611-40-8)
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- 4-(5-Bromothiophen-2-yl)butanoic acid (CAS 89980-93-8)
- 4-Bromo-5-propylthiophene-2-carboxylic acid (CAS 869951-15-5)
- 5-Bromo-2-iodopyridin-3-ol (CAS 188057-49-0)
- [5-(Trifluoromethyl)-1,3-thiazol-2-yl]methanol (CAS 1434142-11-6)
- 2-(3-(Aminomethyl)tetrahydrofuran-3-yl)-3-methylbutan-2-ol (CAS 1499925-07-3)
- Bempedoic Acid Impurity 40 (CAS CATO-C4X-218940)
- 4H-Spiro[4,7-methanobenzo[d]isoxazole-5,1'-cyclopropane] (CAS 107962-84-5)
- 7-bromo-2-hydroxy-pyrido[1,2-a]pyrimidin-4-one (CAS 355135-40-9)
- N-((R)-1-((S)-2-Amino-3-methylbutanoyl)pyrrolidin-3-yl)-N-methylacetamide (CAS 1401665-69-7)
- Ethyl 6-bromo-4-methyl-2,7-dioxo-2,3,3a,7-tetrahydro-1H-naphtho[1,2,3-de]quinoline-1-carboxylate (CAS 51418-86-1)
- N-Stearoyl-DL-dihydrolactocerebroside (CAS 15373-20-3)
- (Ser(PO?H?)2?2)-Tau Peptide (260-264) PAb Blocking trifluoroacetate salt (CAS 2022956-57-4)
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