3-(Thiophen-3-yl)pyridine CAS 21308-81-6
| CAS No. | 21308-81-6 |
| Molecular Formula | C9H7NS |
| Molecular Weight | 161.22 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 161.22 g/mol gives 3-(Thiophen-3-yl)pyridine distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
3-(Thiophen-3-yl)pyridine (CAS 21308-81-6), molecular formula C9H7NS and molecular weight 161.22 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 3-(Thiophen-3-yl)pyridine (C9H7NS) contains a nitrogen-containing heterocyclic scaffold, a nitrile group, sulfur-containing functionality. The molecule exhibits a degree of unsaturation (DBE) of 7.0, corresponding to approximately 7 ring(s) or double-bond equivalent(s). With a molecular weight of 161.22 g/mol, it falls into the medium-molecular-weight range. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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 | C9H7NS |
| Molecular Weight | 161.22 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1963 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Thiophen Standards
- 2-(Thiophen-2-yl)pyridine (CAS 3319-99-1)
- 2-(Thiophen-3-yl)pyridine (CAS 21298-55-5)
- 3-(Thiophen-2-yl)pyridine (CAS 21298-53-3)
- 4-(Thiophen-2-yl)pyridine (CAS 21298-54-4)
- 4-(Thiophen-3-yl)pyridine (CAS 21308-82-7)
- 2-(Thiophen-2-ylsulfanyl)-ethanol (CAS 55697-86-4)
- 4-(Thiophen-2-yl)pyrimidine (CAS 19084-26-5)
- 4-(Thiophen-3-yl)pyrimidine (CAS 19084-28-7)
Recommended Standards
- 3-Aminotetrahydro-2H-thiopyran-3-carboxylic acid (CAS 39124-24-8)
- 3-(Allylthio)-2-aminopropanoic acid (CAS 49621-03-6)
- 4-(2-(Methylthio)ethyl)oxazolidin-2-one (CAS 838862-16-1)
- 2-Thiomorpholinoacetic acid (CAS 6007-55-2)
- Ethyl 4-(dimethylamino)-8-methoxyquinoline-3-carboxylate (CAS 1018135-37-9)
- 1H-Imidazo[4,5-d]pyridazin-2-amine (CAS 160568-14-9)
- 4-(4-Chloro-5-methyl-1h-pyrazol-1-yl)-2-(ethylamino)butanoic acid (CAS 1339442-16-8)
- 1-(Furan-2-yl)-4-(6-methoxynaphthalen-2-yl)butane-1,4-dione (CAS 143570-07-4)
- (S)-2,2,2-Trifluoro-1-(4-(methylthio)phenyl)ethan-1-amine (CAS 929804-88-6)
- n,1-Dipropylpiperidin-4-amine (CAS 1017037-87-4)
- 2-Cyclopropyl-1H-pyrrolo[2,3-b]pyridine-5-carbaldehyde (CAS 1027785-18-7)
- N-(3'-Formyl[1,1'-biphenyl]-4-yl)acetamide (CAS 400750-50-7)
- Fibronectin Analog (CAS 125455-58-5)
- Neuropeptide Y, human (CAS 98264-90-5)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com