3-Hydroxy-2-thiophenecarboxylic Acid Methyl Ester CAS 5118-06-9
| CAS No. | 5118-06-9 |
| Molecular Formula | C6H6O3S |
| Molecular Weight | 158.18 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
3-Hydroxy-2-thiophenecarboxylic Acid Methyl Ester (CAS 5118-06-9) is a high-purity analytical reference standard with the molecular formula C6H6O3S and a molecular weight of 158.18 g/mol.
Owing to a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system, 3-Hydroxy-2-thiophenecarboxylic Acid Methyl Ester is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 158.18 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).
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 3-Hydroxy-2-thiophenecarboxylic Acid Methyl Ester 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 | C6H6O3S |
| Molecular Weight | 158.18 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.) | 1958 |
| Sulfur Atoms | 1 |
Related Hydroxy Standards
- 2-Hydroxy-2-(thiophen-2-yl)acetic acid (CAS 53439-38-6)
- 2-Hydroxy-2-(thiophen-3-yl)acetic acid (CAS 22098-20-0)
- 3-Hydroxy-5-methyl-4H-pyrazole-4-carbothioic O-acid (CAS 860409-20-7)
- 4-HYdroxy-thiophene-2-carboxylic acid methyl ester (CAS 5118-04-7)
- 5-Hydroxy-6-methyl-2-thioxo-2,3-dihydropyrimidin-4(1H)-one (CAS 35463-39-9)
- N-Hydroxy-4-methyl-[1,2,3]thiadiazole-5-carboxamidine (CAS 939999-94-7)
- cis-4-Hydroxy-4-methylcyclohexane-1-carboxylic acid (CAS 1310818-54-2)
- 4-Hydroxy-1-methylcyclohexane-1-carboxylic acid (CAS 1378844-04-2)
Recommended Standards
- 3-fluoro-6-hydrazino-pyridine-2-carbonitrile (CAS 2138519-11-4)
- 3-(Aminomethyl)-1,2,4-thiadiazole-5-carboxamide (CAS 2417722-33-7)
- 3-Methoxyisothiazole-4-carboxamide (CAS 31815-42-6)
- 2-Methoxythiophene-3-carboxylic acid (CAS 71154-29-5)
- 2-(1-Naphthylmethylene)-1H-indene-1,3(2H)-dione (CAS 25116-35-2)
- Ethyl 3,5-dimethyl-4-nitro-1H-pyrrole-2-carboxylate (CAS 5463-44-5)
- 3,4,5-Trimethoxybenzoic Acid 2-Diethylaminoethyl Ester Hydrochloride (CAS 4304-21-6)
- 3-methyl-5-(pyrrolidin-3-yl)pyridine dihydrochloride (CAS 1909320-29-1)
- 1-(N,N-Diethylsulfamoyl)piperidine-4-carboxylic acid (CAS 1042814-95-8)
- 4-Nitrophenyl ((benzyloxy)carbonyl)-D-leucinate (CAS 52235-17-3)
- 1-Chloro-2,5-diethoxy-4-nitrobenzene (CAS 91-43-0)
- Glycolic acid-Phenylalanine-Octreotide (CAS CATO-C4X-152021)
- 2-Methyl-N-(phenylmethylene)alanine Ethyl Ester (CAS 130146-17-7)
- CGMP Dependent Kinase Inhibitor Peptide (CAS 82801-73-8)
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