4-Bromo-1h-imidazole-5-sulfonyl chloride CAS 99903-04-5
| CAS No. | 99903-04-5 |
| Molecular Formula | C3H2BrClN2O2S |
| Molecular Weight | 245.48 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 4-Bromo-1h-imidazole-5-sulfonyl chloride 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-1h-imidazole-5-sulfonyl chloride (CAS 99903-04-5), molecular formula C3H2BrClN2O2S and molecular weight 245.48 g/mol, is a CATO reference standard with documented purity and traceability.
4-Bromo-1h-imidazole-5-sulfonyl chloride (C3H2BrClN2O2S) contains an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine/bromine substitution. It is notably hygroscopic, halogen substitution raises its density and boiling point, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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.
Physical & Chemical Properties
| Molecular Formula | C3H2BrClN2O2S |
| Molecular Weight | 245.48 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1985 |
| Halogen Content | Cl/Br-containing |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Bromo Standards
- 4-Bromo-1H-pyrazole-1-sulfonyl chloride (CAS 1172073-75-4)
- 6-BROMO-4-CHLOROPTERIDINE (CAS 1260787-67-4)
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- 3-Bromo-5-chloro-7-methyl-1H-pyrrolo[3,2-b]pyridine (CAS 1190310-89-4)
- 5-bromo-3-chloro-4-methyl-1H-Pyrrolo[2,3-b]pyridine (CAS 1190314-14-7)
Recommended Standards
- 3-Bromofuran-2-sulfonyl chloride (CAS 930111-08-3)
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- 69045-79-0 2-Chloro-5-iodopyridine Pyridine, 2-chloro-5-iodo- BCP22108 (CAS 69045-79-0)
- N-(1-(2-Aminoethyl)pyrrolidin-3-yl)acetamide (CAS 477576-35-5)
- 2-Benzyl-2,5-diazabicyclo[2.2.1]heptane (CAS 114086-14-5)
- 2-(Difluoromethyl)-4,5-dihydroxy-3-iodopyridine (CAS 1805324-48-4)
- 4-(2-(Azepan-1-yl)-2-oxoethoxy)benzaldehyde (CAS 767630-86-4)
- 2-Propenoic acid, polymer with ethenyl acetate (CAS 24980-58-3)
- 6-(Benzyloxy)-3-bromo-2-fluoropyridine (CAS 1881291-08-2)
- 0522AD 1185303-92-7 C14H24Cl2N2O {2-[2-(Piperidin-1-ylmethyl)phenoxy]ethyl}amine dihydrochloride (CAS 1185303-92-7)
- (4-Chloro-3-methylpyridin-2-yl)methanol hydrochloride (CAS 152402-96-5)
- N-{1-[(3-methoxyphenyl)methyl]-5,6-dimethyl-1H-1,3-benzodiazol-4-yl}-3-(trifluoromethyl)benzene-1-sulfonamide (CAS 338955-23-0)
- Peptide Impurity 82 (CAS 10491-78-8)
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