2-Bromo-5-chlorobenzenethiol CAS 54404-02-3
| CAS No. | 54404-02-3 |
| Molecular Formula | C6H4BrClS |
| Molecular Weight | 223.52 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 2-Bromo-5-chlorobenzenethiol.
2-Bromo-5-chlorobenzenethiol (CAS 54404-02-3), molecular formula C6H4BrClS and molecular weight 223.52 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C6H4BrClS, 2-Bromo-5-chlorobenzenethiol contains sulfur-containing functionality, chlorine/bromine substitution, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 223.52 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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.
As a certified reference material (CRM), 2-Bromo-5-chlorobenzenethiol 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 | C6H4BrClS |
| Molecular Weight | 223.52 g/mol |
| Purity | 97%+ |
| Storage | Store at room temperature, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO |
| Stability | May oxidize slowly on prolonged air exposure |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1972 |
| Halogen Content | Cl/Br-containing |
| Sulfur Atoms | 1 |
Related Bromo Standards
- 3-Bromo-5-chlorobenzenethiol (CAS 1263376-19-7)
- 2-Bromo-6-chlorobenzene-1-thiol (CAS 1263376-31-3)
- 3-Bromo-4-chlorobenzene-1-thiol (CAS 1263376-96-0)
- 2-Bromo-4-chlorobenzenethiol (CAS 54404-01-2)
- 4-Bromo-2-chlorobenzene-1-thiol (CAS 99839-25-5)
- 4-Bromo-3-chlorobenzene-1-thiol (CAS 853308-08-4)
- 5-Bromo-2-chlorobenzenethiol (CAS 740806-63-7)
- 4-Bromo-1-(2-chloroethyl)-3-methyl-1H-pyrazole (CAS 108354-38-7)
Recommended Standards
- 1,2,4-Trichloro-3,5,6-trimethylbenzene (CAS 10203-45-9)
- (2,2-Dichlorocyclopropyl)methanesulfonyl chloride (CAS 1146290-10-9)
- 1,3-Dichloro-2-(3-chloropropyl)benzene (CAS 1057673-07-0)
- 4-Bromo-3-(chloromethyl)-1,5-dimethyl-1H-pyrazole (CAS 2090477-79-3)
- α-DimethylaminopropiophenoneHCl (CAS 10105-90-5)
- 3-Benzoylpicolinicacid (CAS 64362-32-9)
- 1-(4-chlorophenyl)-3-methyl-1H-pyrazole-4-carbaldehyde (CAS 1152543-59-3)
- N-Desmethyl Terbinafine Hydrochloride (CAS 152830-98-3)
- Azithromycin Impurity 31 (CAS CATO-C4X-100331)
- 1-(6-Methylpyrimidin-4-yl)piperidin-3-amine (CAS 1247748-92-0)
- 1-[4-(3-Bromoprop-1-yn-1-yl)phenyl]ethan-1-one (CAS 731785-24-3)
- Elobixibat Impurity 28 (CAS CATO-C4X-283828)
- 3-chloro-6-nitro-benZo[b]thiophene-2-carboxylic acid methyl ester (CAS 59812-36-1)
- Tirzepatide Impurity 44 (CAS CATO-C4X-324044)
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