7-Chlorothieno[3,2-b]pyridin-5(4H)-one CAS 74695-45-7
| CAS No. | 74695-45-7 |
| Molecular Formula | C7H4ClNOS |
| Molecular Weight | 185.63 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.
7-Chlorothieno[3,2-b]pyridin-5(4H)-one (CAS 74695-45-7), molecular formula C7H4ClNOS and molecular weight 185.63 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 7-Chlorothieno[3,2-b]pyridin-5(4H)-one (C7H4ClNOS) contains an amide group, sulfur-containing functionality, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 6.0, corresponding to approximately 6 ring(s) or double-bond equivalent(s). With a molecular weight of 185.63 g/mol, it falls into the medium-molecular-weight range. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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 | C7H4ClNOS |
| Molecular Weight | 185.63 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, water (slightly soluble) |
| 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.) | 1978 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Chlorothieno Standards
- 4-Chlorothieno[3,2-d]pyrimidin-2-amine (CAS 1378824-80-6)
- 4-Chlorothieno[2,3-b]pyridine 7-oxide (CAS 25557-54-4)
- 4-Chlorothieno[3,2-d]pyrimidin-6-amine (CAS 936354-32-4)
- 4-Chlorothieno[3,2-d]pyrimidin-7-amine (CAS 2839502-29-1)
- 5-Chlorothieno[3,2-b]pyridin-7-ol (CAS 90690-93-0)
- 7-Chlorothieno[3,2-c]pyridin-4(5H)-one (CAS 29079-93-4)
- 2-Chlorothieno[3,2-b]pyridin-3-amine (CAS 26579-61-3)
- 2-Chlorothieno[3,2-d]pyrimidin-4(3H)-one, 97% (CAS 1245811-20-4)
Recommended Standards
- 7-Chlorobenzoxazole-2(3H)-thione (CAS 51793-93-2)
- 7-Chlorobenzo[d]thiazol-2(3H)-one (CAS 80416-76-8)
- 8-chloro-6-fluoro-1,2,3,4-tetrahydroquinoline (CAS 954571-06-3)
- 7-Chlorobenzo[d]isothiazol-3(2H)-one (CAS 4337-44-4)
- (Z)-14-methyl-8-hexadecen-1-al (CAS 60609-53-2)
- 4-((4-(Tert-butyl)benzyl)thio)-N-ethyl-6-(trifluoromethyl)pyrimidin-2-amine (CAS 339011-22-2)
- Ethyl 3-chloro-6-(trifluoromethyl)quinoxaline-2-carboxylate (CAS 194423-80-8)
- [1-(3-Ethoxypropyl)-2-methanesulfonyl-1h-imidazol-5-yl]methanol (CAS 1221342-60-4)
- Ethyl 2-(3-methyl-1h-pyrazol-1-yl)acetate (CAS 934172-61-9)
- 2-Amino-1-((S)-2-((benzyl(cyclopropyl)amino)methyl)piperidin-1-yl)-3-methylbutan-1-one (CAS 1354027-37-4)
- 3-(2-(Trifluoromethyl)-1H-imidazol-1-yl)propan-1-amine (CAS 1368385-79-8)
- N-[4-(2,3-Dichlorophenyl)-3,4-dihydro-1(2H)-naphthalenylidene]methanamine (CAS 340830-05-9)
- 4-Methyl-4H-pyrrolo[3,2-d]thiazole (CAS 1000780-27-7)
- Tirzepatide Impurity 47 (CAS CATO-C4X-324047)
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