Benzo[b]thiophene-3-carboxylic Acid CAS 5381-25-9
| CAS No. | 5381-25-9 |
| Molecular Formula | C9H6O2S |
| Molecular Weight | 178.21 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Benzo[b]thiophene-3-carboxylic Acid.
Benzo[b]thiophene-3-carboxylic Acid (CAS 5381-25-9), molecular formula C9H6O2S and molecular weight 178.21 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C9H6O2S, Benzo[b]thiophene-3-carboxylic Acid contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 178.21 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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.
CATO manufactures Benzo[b]thiophene-3-carboxylic Acid 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 | C9H6O2S |
| Molecular Weight | 178.21 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
| Sulfur Atoms | 1 |
Related Benzo Standards
- Benzo[d]thiazole-6-carboxamide (CAS 101084-51-9)
- Benzo[b]thiophene-4-carboxylic acid (CAS 10134-95-9)
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- Benzo[d]thiazole-5-carboxamide (CAS 1158749-25-7)
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- (1H-Benzo[d]imidazole-1,2-diyl)dimethanol (CAS 58566-88-4)
Recommended Standards
- 7-Mercapto-2H-chromen-2-one (CAS 907966-93-2)
- Benzothiazole-2-carboxylic acid amide (CAS 29198-43-4)
- 6-thien-3-ylpyridazin-3(2H)-one (CAS 78784-78-8)
- Di(furan-2-yl)methanethione (CAS 389130-79-4)
- 7-(p-Tolyloxy)octahydropyrrolo[1,2-a]pyrazine (CAS 1422058-96-5)
- 1-(2-(3,4-Dimethoxyphenyl)-1-hydroxy-4-methyl-1H-imidazol-5-yl)ethan-1-one (CAS 690990-76-2)
- 2-(3,4-Dimethylphenyl)isoindolin-1-imine hydrobromide (CAS 1171857-22-9)
- N,N-Diphenyl-5,6,7,8-tetrahydronaphthalen-2-amine (CAS 1956319-70-2)
- 4-(5-Nitrobenzimidazol-2-yl)aniline Hydrochloride (CAS 1385694-71-2)
- 5-Hexyl-1-benzofuran (CAS 1400644-42-9)
- Omarigliptin Impurity 14 (CAS CATO-C4X-114714)
- 4-(1-Naphthylmethoxy)aniline hydrochloride (CAS 1185302-00-4)
- 6-Amino-2-hydroxypyrimidin-4(3H)-one (CAS 143519-01-1)
- Exenatide (CAS 141758-74-9（free base）)
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