1,3,7,9-Tetrachlorodibenzo[b,d]thiophene CAS 134705-51-4
| CAS No. | 134705-51-4 |
| Molecular Formula | C12H4Cl4S |
| Molecular Weight | 322.04 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
1,3,7,9-Tetrachlorodibenzo[b,d]thiophene (CAS 134705-51-4) is a high-purity analytical reference standard with the molecular formula C12H4Cl4S and a molecular weight of 322.04 g/mol.
Based on its molecular formula C12H4Cl4S, 1,3,7,9-Tetrachlorodibenzo[b,d]thiophene contains sulfur-containing functionality, chlorine substitution, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 322.04 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.
As a certified reference material (CRM), 1,3,7,9-Tetrachlorodibenzo[b,d]thiophene 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 | C12H4Cl4S |
| Molecular Weight | 322.04 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1995 |
| Halogen Content | Cl-containing |
| Sulfur Atoms | 1 |
Related Tetrachlorodibenzo Standards
- 2,3,7,8-Tetrachlorodibenzo[b,d]thiophene (CAS 133513-17-4)
- 3,4,6,7-Tetrachlorodibenzo[b,d]thiophene (CAS 133513-18-5)
- 2,3,6,7-Tetrachlorodibenzo[b,d]thiophene (CAS 133513-19-6)
- 2,4,6,8-Tetrachlorodibenzo[b,d]thiophene (CAS 134705-49-0)
- 1,4,6,9-Tetrachlorodibenzo[b,d]thiophene (CAS 134705-50-3)
- 1,3,7,8-Tetrachlorodibenzo[b,d]thiophene (CAS 134705-52-5)
- 1,2,6,9-Tetrachlorodibenzo[b,d]thiophene (CAS 134705-53-6)
- 1,2,8,9-Tetrachlorodibenzo[b,d]thiophene (CAS 134705-54-7)
Recommended Standards
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- 17-Hydroxy Pregnenolone (CAS 387-79-1)
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