4-Bromo-2-mercaptobenzaldehyde CAS 20142-20-5
| CAS No. | 20142-20-5 |
| Molecular Formula | C7H5BrOS |
| Molecular Weight | 217.08 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 217.08 g/mol gives 4-Bromo-2-mercaptobenzaldehyde distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
CATO supplies 4-Bromo-2-mercaptobenzaldehyde (CAS 20142-20-5), a certified reference material (molecular formula C7H5BrOS, MW 217.08 g/mol) for analytical method development and quality control.
The molecular framework of 4-Bromo-2-mercaptobenzaldehyde (C7H5BrOS) is characterized by sulfur-containing functionality, a hydroxyl group, an ether linkage, bromine substitution, an aromatic ring system. In reversed-phase chromatography, its retention is governed primarily by the polarity and ionization state of its functional groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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.
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 | C7H5BrOS |
| Molecular Weight | 217.08 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 |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1962 |
| Halogen Content | Br-containing |
| Sulfur Atoms | 1 |
Related Bromo Standards
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Recommended Standards
- 2-Bromo-1-fluoro-4-propylbenzene (CAS 943247-64-1)
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- 3'-Cyano-5-fluoro-[1,1'-biphenyl]-2-carboxylic acid (CAS 1178671-57-2)
- (Z)-1-(3-(pyrrolidin-1-yl)-5-(trifluoromethyl)pyridin-2-yl)ethan-1-one O-((4-chlorophenyl)carbamoyl) oxime (CAS 860611-42-3)
- 6-Amino-4-(trifluoromethyl)pyridin-2(1H)-one (CAS 141187-98-6)
- 3-Phenylisoxazol-4-amine (CAS 23350-02-9)
- (1-(4-Chlorophenyl)-3-(4-(methylthio)phenyl)-1H-pyrazol-4-yl)methanol (CAS 618383-36-1)
- 5-bromo-7-chloro-1,2,3,4-tetrahydroquinolin-2-one (CAS 1803611-66-6)
- 3-Bromo-7-fluoroimidazo[1,2-a]pyridine (CAS 1263058-67-8)
- Des-Ala21-Tirzepatide (CAS CATO-CPTD788952)
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