5-Chlorothieno[2,3-b]pyridine CAS 21344-25-2
| CAS No. | 21344-25-2 |
| Molecular Formula | C7H4ClNS |
| Molecular Weight | 169.63 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 169.63 g/mol gives 5-Chlorothieno[2,3-b]pyridine distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
5-Chlorothieno[2,3-b]pyridine (CAS 21344-25-2), molecular formula C7H4ClNS and molecular weight 169.63 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a nitrile group, sulfur-containing functionality, chlorine substitution, an aromatic ring system, 5-Chlorothieno[2,3-b]pyridine is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 169.63 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
CATO manufactures 5-Chlorothieno[2,3-b]pyridine under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C7H4ClNS |
| Molecular Weight | 169.63 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1963 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Chlorothieno Standards
- 6-Chlorothieno[3,2-c]pyridine (CAS 1781989-24-9)
- 2-Chlorothieno[2,3-b]pyridine (CAS 1823943-95-8)
- 2-Chlorothieno[2,3-c]pyridine (CAS 756477-32-4)
- 2-Chlorothieno[3,2-b]pyridine (CAS 94191-14-7)
- 2-Chlorothieno[3,2-c]pyridine (CAS 28783-23-5)
- 3-Chlorothieno[2,3-b]pyridine (CAS 53399-36-3)
- 3-Chlorothieno[3,2-b]pyridine (CAS 94191-11-4)
- 4-Chlorothieno[2,3-c]pyridine (CAS 477874-92-3)
Recommended Standards
- 5-Chlorobenzothiazole (CAS 2786-51-8)
- 6-Chlorobenzo[d]isothiazole (CAS 89583-89-1)
- 5-Chlorobenzo[d]isothiazole (CAS 41918-07-4)
- 6-Chlorobenzo[d]thiazole (CAS 2942-10-1)
- 5-(Hydroxymethyl)-4-(pyridin-3-yl)-2,4-dihydro-3H-1,2,4-triazole-3-thione (CAS 1508001-08-8)
- 3-Cyclopropoxy-N,N-dimethyl-5-nitropicolinamide (CAS 1243313-20-3)
- (2-((3,4-Dichlorobenzyl)oxy)phenyl)boronic acid (CAS 1256355-84-6)
- 5-(Aminomethyl)-3-(difluoromethyl)-6-(trifluoromethoxy)pyridin-2-amine (CAS 1804608-75-0)
- 5-Chloro-N-(4-chlorophenyl)-6-oxo-1-(3-(trifluoromethyl)benzyl)-1,6-dihydropyridine-3-carboxamide (CAS 339024-12-3)
- (5-Nitro-1H-imidazol-4-yl)(piperidin-1-yl)methanone (CAS 90521-89-4)
- 5-((4-(Trifluoromethyl)benzyl)thio)imidazo[1,2-c]quinazolin-2(3H)-one (CAS 478046-12-7)
- (S)-2-Bromo-1-(3-chloro-4-fluorophenyl)ethanol (CAS 1568253-17-7)
- 1-(2-Bromo-1-(2,2,2-trifluoroethoxy)ethyl)-4-chlorobenzene (CAS 1248784-78-2)
- Neuropeptide EI (human, mouse, rat) (CAS 125934-45-4)
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