6-Bromo-2-(methylthio)-1H-indol-3-ol sulfate CAS 74626-31-6
| CAS No. | 74626-31-6 |
| Molecular Formula | C9H8BrNOS |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
6-Bromo-2-(methylthio)-1H-indol-3-ol sulfate (CAS 74626-31-6), molecular formula C9H8BrNOSH2O4S and molecular weight 356.20 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage, bromine substitution, 6-Bromo-2-(methylthio)-1H-indol-3-ol sulfate is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 356.20 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.
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 | C9H8BrNOS H2O4S |
| Molecular Weight | 356.20 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| 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) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1978 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 2 |
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Recommended Standards
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- 5-Amino-N-(4-iodophenyl)-2-methoxybenzene-1-sulfonamide (CAS 438031-73-3)
- SIB 1757 (CAS 31993-01-8)
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- Carbamimidothioic acid, N-cyano-N'-methyl-, methyl ester (CAS 5848-24-8)
- (9H-fluoren-9-yl)methyl (R)-(1-hydroxy-4-methylpentan-3-yl)carbamate (CAS 1353293-66-9)
- Semaglutide impurity 257 (CAS CATO-C4X-2226257)
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