2-Chloro-5-(methylthio)thiophene CAS 23167-83-1
| CAS No. | 23167-83-1 |
| Molecular Formula | C5H5ClS2 |
| Molecular Weight | 164.68 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-Chloro-5-(methylthio)thiophene.
2-Chloro-5-(methylthio)thiophene (CAS 23167-83-1) is a high-purity analytical reference standard with the molecular formula C5H5ClS2 and a molecular weight of 164.68 g/mol.
Owing to sulfur-containing functionality, chlorine substitution, 2-Chloro-5-(methylthio)thiophene is typically white to off-white crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 164.68 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.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C5H5ClS2 |
| Molecular Weight | 164.68 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, 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) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1963 |
| Halogen Content | Cl-containing |
| Sulfur Atoms | 2 |
Related Chloro Standards
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Recommended Standards
- (5-Chlorothiophen-2-yl)methanethiol (CAS 61675-73-8)
- 6258-66-8 Benzenemethanethiol, 4-chloro- (9CI) p-Chlorotoluene-alpha-thiol EINECS 228-395-7 NSC 108735 (CAS 6258-66-8)
- 23144-52-7 8-Chlor-octan-1-ol 8-Chloro-1-octanol 8-Chloro-octan-1-ol NSC 5514 (CAS 23144-52-7)
- Chlorodiethylisopropylsilane (CAS 107149-56-4)
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- Insulin aspart (CAS 116094-23-6)
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