4-Hydroxythieno[2,3-b]pyridine-5-carboxylic acid CAS 55503-32-7
Purity 97%+In StockPharmaceutical Standards
| CAS No. | 55503-32-7 |
| Molecular Formula | C8H5NO3S |
| Molecular Weight | 195.20 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4-Hydroxythieno[2,3-b]pyridine-5-carboxylic acid (CAS 55503-32-7) reference standard, produced by CATO (ISO 17034 / CNAS / ANAB accredited). Molecular formula: C8H5NO3S. Molecular weight: 195.20 g/mol. Trusted by 10,000+ laboratories worldwide for pharmaceutical analysis and QC.
Physical & Chemical Properties
| Molecular Formula | C8H5NO3S |
| Molecular Weight | 195.20 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1972 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Hydroxythieno Standards
- 7-Hydroxythieno[2,3-c]pyridine-4-carboxylic acid (CAS 1360953-85-0)
- 7-Hydroxythieno[3,2-b]pyridine-6-carboxylic acid (CAS 152996-00-4)
- 4-Hydroxythieno[3,2-c]pyridine-7-carboxylic acid (CAS 55040-46-5)
- 3-Hydroxythieno[2,3-d]pyrimidine-2,4(1H,3H)-dione (CAS 53229-49-5)
- Methyl 3-hydroxythieno[3,2-b]pyridine-2-carboxylate (CAS 111042-98-9)
- Methyl 3-hydroxythieno[2,3-b]pyridine-2-carboxylate (CAS 111043-01-7)
- Methyl 4-hydroxythieno[2,3-b]pyridine-6-carboxylate (CAS 133223-48-0)
- Methyl 4-hydroxythieno[3,2-c]pyridine-7-carboxylate (CAS 1360929-34-5)
Recommended Standards
- 4-Dimethylphosphorylbicyclo[4.2.0]octa-1(6),2,4-trien-3-amine (CAS 2634647-68-8)
- 4A-(((2-methoxyethoxy)methoxy)methyl)-4,4a,5,6,7,8-hexahydronaphthalen-2(3H)-one (CAS 84987-89-3)
- 4-Methyl-5-nitrobenzo[c][1,2,5]thiadiazole (CAS 3152-86-1)
- 3-Mercaptopyridin-2(1H)-one (CAS 173278-51-8)
- tert-Butyl 4-(((3-methoxyquinoxalin-2-yl)amino)methyl)piperidine-1-carboxylate (CAS 1065485-11-1)
- Ethyl 2-[trans-4-(Ethylcarbamoyl)cyclohexyl]acetate (CAS 669080-91-5)
- 3-(Hydroxymethyl)-1h-indazole-5-carboxylic acid (CAS 1082041-77-7)
- 7-((4'-Cyano-[1,1'-biphenyl]-4-yl)oxy)-N-hydroxyheptanamide (CAS 191228-04-3)
- 2-(Isoindolin-2-yl)acetic acid hydrochloride (CAS 1215322-31-8)
- Semaglutide impurity 215 (CAS CATO-C4X-2226215)
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