5-Ethoxy-2-thiophenecarboxylic Acid CAS 135080-30-7
| CAS No. | 135080-30-7 |
| Molecular Formula | C7H8O3S |
| Molecular Weight | 172.20 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Owing to a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system, 5-Ethoxy-2-thiophenecarboxylic Acid is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 172.20 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
5-Ethoxy-2-thiophenecarboxylic Acid (CAS 135080-30-7) is a high-purity analytical reference standard with the molecular formula C7H8O3S and a molecular weight of 172.20 g/mol.
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
As a certified reference material (CRM), 5-Ethoxy-2-thiophenecarboxylic Acid 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 | C7H8O3S |
| Molecular Weight | 172.20 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1995 |
| Sulfur Atoms | 1 |
Related Ethoxy Standards
- 4-Ethoxy-2-ethyl-5-methyl-3-oxoheptanedioic acid (CAS 137024-37-4)
- 5-Ethoxy-N-methyl-4,5-dihydroisoxazole-3-carboxamide (CAS 144537-11-1)
- 3-Ethoxy-3-oxopropyl acrylate (CAS 39181-94-7)
- Ethyl 4-ethoxy-2-oxobut-3-enoate (CAS 76240-19-2)
- 2-Ethoxy-4-fluorobenzenethiol (CAS 1207891-59-5)
- Ethyl 2-ethoxy-3-methylcyclopropane-1-carboxylate (CAS 1212192-55-6)
- 4-Ethoxy-3-fluorothiophenol (CAS 1349715-94-1)
- 2-Ethoxy-5-fluorobenzenethiol (CAS 1379199-18-4)
Recommended Standards
- (S)-2-Amino-3-(thiazol-5-yl)propanoic acid (CAS 1343718-84-2)
- 4-(Fluoromethyl)bicyclo[2.2.1]Heptane-1-carboxylic acid (CAS 1350821-85-0)
- (R)-2-Amino-3-(thiazol-2-yl)propanoic acid (CAS 134235-87-3)
- 2-(Ethylamino)-1,3-thiazole-5-carboxylic acid (CAS 1354963-14-6)
- Sodium 3-ethyl-7-isopropylazulene-1-sulfonate (CAS 97683-31-3)
- (R)-Methyl 2-(4-formyl-3-hydroxyphenyl)propanoate (CAS 1956435-11-2)
- 6-benzyl-2-(methylthio)-5,6,7,8-tetrahydropyrido[4,3-d]pyrimidin-4(3H)-one (CAS 1033-34-7)
- 2-Methyl-1,5-dihydrospiro[benzo[c]azepine-4,4'-piperidin]-3(2H)-one (CAS 1422062-66-5)
- 1-((2-Chlorothiazol-5-yl)methyl)-1H-indole-3-carbaldehyde (CAS 439095-43-9)
- Tofacitinib Impurity 81 (CAS 2315287-12-6)
- N-(3-Amino-2-methylphenyl)-4-ethoxybenzamide (CAS 1016764-79-6)
- endo-3-Methyl-8-azabicyclo[3.2.1]octan-3-ol (CAS 866929-77-3)
- (4,6-Dimethoxy-1,3,5-triazin-2-yl)boronic acid (CAS 675880-39-4)
- [3,5 Diiodo-Tyr7] Peptide T (CAS 128551-40-6)
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