3-Acetamidothiophene-2-carboxylic acid CAS 50901-18-3
| CAS No. | 50901-18-3 |
| Molecular Formula | C7H7NO3S |
| Molecular Weight | 185.20 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
3-Acetamidothiophene-2-carboxylic acid (CAS 50901-18-3), molecular formula C7H7NO3S and molecular weight 185.20 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 3-Acetamidothiophene-2-carboxylic acid (C7H7NO3S) contains an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 5.0, corresponding to approximately 5 ring(s) or double-bond equivalent(s). With a molecular weight of 185.20 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).
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 | C7H7NO3S |
| Molecular Weight | 185.20 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1971 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Acetamidothiophene Standards
Recommended Standards
- 3-(Methylthio)-4-nitrophenol (CAS 771-94-8)
- 3-Fluoro-4-(2-methoxyethoxy)aniline (CAS 221199-26-4)
- 3-(Dimethoxymethyl)-2-fluoroaniline (CAS 2244087-96-3)
- 3-fluoro-9H-carbazole (CAS 391-45-7)
- Ethyl 3-(5-(2-chlorophenyl)furan-2-yl)-2-cyanoacrylate (CAS 85460-06-6)
- 1-(2-Chloro-6-fluorobenzyl)-4-nitro-1h-pyrazole (CAS 333444-49-8)
- [(3-Isopropyl-4,5-dihydro-5-isoxazolyl)methyl]amine hydrochloride (CAS 1609407-96-6)
- N-Methyl-2-(piperazin-1-yl)nicotinamide (CAS 902837-15-4)
- Loteprednol Impurity 6 (CAS CATO-C4X-19576)
- (2S)-1-(Chloroacetyl)-4,4-Difluoro-2-Pyrrolidinecarbonitrile (CAS 596817-02-6)
- 5-(morpholinomethyl)thiazol-2-amine (CAS 3008-62-6)
- Ethyl isoxazolo[5,4-b]pyridine-3-carboxylate (CAS 1520056-19-2)
- N,N-Dimethyl-5-nitro-3-(trifluoromethyl)pyridin-2-amine (CAS 813425-49-9)
- Casein Kinase II Receptor Peptide (CAS 198481-81-1)
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