5-(2,3-Dihydrobenzo[b][1,4]dioxin-6-yl)thiophene-2-carboxylic acid CAS 790681-94-6
| CAS No. | 790681-94-6 |
| Molecular Formula | C13H10O4S |
| Molecular Weight | 262.28 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 5-(2,3-Dihydrobenzo[b][1,4]dioxin-6-yl)thiophene-2-carboxylic acid.
5-(2,3-Dihydrobenzo[b][1,4]dioxin-6-yl)thiophene-2-carboxylic acid (CAS 790681-94-6), molecular formula C13H10O4S and molecular weight 262.28 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 5-(2,3-Dihydrobenzo[b][1,4]dioxin-6-yl)thiophene-2-carboxylic acid (C13H10O4S) contains 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 9.0, corresponding to approximately 9 ring(s) or double-bond equivalent(s). With a molecular weight of 262.28 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 | C13H10O4S |
| Molecular Weight | 262.28 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1986 |
| Sulfur Atoms | 1 |
Related Dihydrobenzo Standards
- 3-Oxo-2,3-dihydrobenzo[d]isothiazole-6-sulfonamide 1,1-dioxide (CAS 14121-27-8)
- (2,3-Dihydrobenzo[b][1,4]dioxin-6-yl)(5-methylthiophen-2-yl)methanol (CAS 1284422-43-0)
- 2-(2,3-Dihydrobenzo[b][1,4]dioxin-5-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (CAS 1116104-19-8)
- N-((1,5-dihydrobenzo[e][1,3]dioxepin-3-yl)methyl)cyclohexanamine (CAS 332167-80-3)
- N-(2,3-dihydrobenzo[b][1,4]dioxin-6-yl)thiophene-2-carboxamide (CAS 288312-08-3)
- N-(2,3-Dihydrobenzo[b][1,4]dioxin-6-yl)thiophene-3-carboxamide (CAS 923734-91-2)
- (2,3-Dihydrobenzo[b][1,4]dioxin-6-yl)(3-hydroxypiperidin-1-yl)methanone (CAS 1153231-92-5)
- (2,3-Dihydrobenzo[b][1,4]dioxin-5-yl)(4-hydroxypiperidin-1-yl)methanone (CAS 1154969-99-9)
Recommended Standards
- 4-Oxo-3-(prop-2-en-1-yl)-2-sulfanyl-3,4-dihydroquinazoline-7-carboxylic acid (CAS 309969-95-7)
- 5-(2-Amino-1,3-thiazol-4-yl)-6-methoxy-2,3-dihydro-1-benzofuran-3-one (CAS 923869-45-8)
- 4-Formyl-2-methoxyphenyl thiophene-2-carboxylate (CAS 361472-61-9)
- 5-[(anilinocarbonyl)amino]thiophene-2-carboxylic acid (CAS 924862-06-6)
- 2-(4-Bromophenyl)-5-chloro-4-(4-methoxyphenoxy)-2,3-dihydropyridazin-3-one (CAS 551921-42-7)
- ethyl 4-methylpiperidine-2-carboxylate hydrochloride (CAS 68285-79-0)
- Ethyl 4-amino-2-((chloromethyl)thio)thiazole-5-carboxylate (CAS 845879-10-9)
- (Z)-4-(Dimethylamino)-N'-hydroxybenzimidamide (CAS 1585960-54-8)
- 1-(4-Bromophenyl)-3-(ethoxycarbonyl)-4,5-dihydro-1h-pyrazole-5-carboxylic acid (CAS 1264041-06-6)
- 5-(1H-1,3-benzodiazol-2-yl)pyridin-3-amine (CAS 1082159-77-0)
- 3-(3-Chloropropanoyl)-1-methylurea (CAS 82277-88-1)
- 3-((2,4,5-Trifluorobenzyl)oxy)pyrrolidine (CAS 1121636-42-7)
- 1-Bromo-3,5-bis(tert-butoxymethyl)benzene (CAS 1245644-77-2)
- Semaglutide (CAS 910463-68-2)
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