4-Phenoxythiophene-2-carboxylic acid CAS 81028-69-5
Purity 97%+In StockPharmaceutical Standards
| CAS No. | 81028-69-5 |
| Molecular Formula | C11H8O3S |
| Molecular Weight | 220.24 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4-Phenoxythiophene-2-carboxylic acid (CAS 81028-69-5) reference standard, produced by CATO (ISO 17034 / CNAS / ANAB accredited). Molecular formula: C11H8O3S. Molecular weight: 220.24 g/mol. Trusted by 10,000+ laboratories worldwide for pharmaceutical analysis and QC.
Physical & Chemical Properties
| Molecular Formula | C11H8O3S |
| Molecular Weight | 220.24 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1980 |
| Sulfur Atoms | 1 |
Related Phenoxythiophene Standards
Recommended Standards
- 4-Fluorospiro[indoline-3,4'-piperidin]-2-one (CAS 2089292-91-9)
- 5-(Phenylthio)furan-2-carboxylic acid (CAS 61942-18-5)
- 3-[2-(4-Fluorophenyl)hydrazin-1-yl]cyclohex-2-en-1-one (CAS 907211-93-2)
- (3,4-Dihydro-2H-benzo-[b][1,4]oxazin-7-yl)boronic acid (CAS 1253911-87-3)
- (7-chloro-2H-1,3-benzodioxol-5-yl)methanamine (CAS 760936-21-8)
- N-[(Methylcarbamothioyl)amino]-3-(thiophen-2-yl)-6-(trifluoromethyl)thieno[3,2-b]pyridine-2-carboxamide (CAS 477854-05-0)
- 3,5-dibromo-1-(propan-2-yl)-1H-1,2,4-triazole (CAS 1240567-67-2)
- (S,R,S)-AHPC-PEG1-NH2 (dihydrochloride) (CAS 2341796-83-4)
- 4-Amino-3,5-diiodopyridine (CAS 98136-86-8)
- Allo-D-Ile27-Tirzepatide (CAS CATO-CPTD788961)
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 13829788188 / jacky.chen@cato-chem.com