4-Aminothiophene-2-carboxylic acid hydrochloride CAS 89499-33-2
| CAS No. | 89499-33-2 |
| Molecular Formula | C5H5NO2S |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 179.62 g/mol gives 4-Aminothiophene-2-carboxylic acid hydrochloride distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
4-Aminothiophene-2-carboxylic acid hydrochloride (CAS 89499-33-2) is a high-purity analytical reference standard with the molecular formula C5H5NO2SHCl and a molecular weight of 179.62 g/mol.
Based on its molecular formula C5H5NO2SHCl, 4-Aminothiophene-2-carboxylic acid hydrochloride contains an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 179.62 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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.
As a certified reference material (CRM), 4-Aminothiophene-2-carboxylic acid hydrochloride meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C5H5NO2S HCl |
| Molecular Weight | 179.62 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1982 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Aminothiophene Standards
- 3-Aminothiophene-2-carboxylic acid hydrochloride (CAS 1016552-72-9)
- 4-Aminothiophene-3-carboxylic acid hydrochloride (CAS 1049777-16-3)
- 5-Aminothiophene-3-carboxylic acid (CAS 116539-01-6)
- Ethyl (2-aminothiophene-3-carbonyl)carbamate (CAS 1171382-99-2)
- Potassium 3-aminothiophene-2-carboxylate (CAS 1210469-45-6)
- 4-Aminothiophene-3-carbonitrile hydrochloride (CAS 121071-72-5)
- 3-Aminothiophene-2-carbonitrile hydrochloride (CAS 122805-71-4)
- 4-Aminothiophene-3-carbaldehyde (CAS 1261658-19-8)
Recommended Standards
- 3-Ethoxybutan-1-ol (CAS 82655-81-0)
- Gemcitabine Impurity 11 (CAS 143157-25-9)
- 4-CHloro-3-(2-methoxyethoxy)phenol (CAS 1394968-35-4)
- 4-[(4-Chlorophenyl)sulfanyl]-5-methoxy-2-phenylpyrimidine (CAS 477857-67-3)
- 7-Methyl-3,4-dihydro-1,8-naphthyridin-2(1H)-one (CAS 959616-99-0)
- rel-(3aR,7aS)-2-(tert-Butoxycarbonyl)-5-methyloctahydro-1H-pyrrolo[3,4-c]pyridine-7a-carboxylic acid (CAS 2307753-93-9)
- 4-((4-Bromo-1H-pyrazol-1-yl)methyl)-3,5-dimethylisoxazole (CAS 1011349-23-7)
- 4,4',4''-(1,3,5-Cyclohexanetriyl)tris-pyridine (CAS 7041-17-0)
- 4-Succinimidyloxycarbonyl-α-methyl-α-(2-pyridyldithio)toluene (CAS 112241-19-7)
- Smac-N7 Peptide (CAS 401913-57-3)
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