Methyl 5-Amino-3-methylthiophene-2-carboxylate Hydrochloride CAS 547762-42-5
| CAS No. | 547762-42-5 |
| Molecular Formula | C7H9NO2S |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Methyl 5-Amino-3-methylthiophene-2-carboxylate Hydrochloride (CAS 547762-42-5), molecular formula C7H9NO2SHCl and molecular weight 207.67 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, Methyl 5-Amino-3-methylthiophene-2-carboxylate Hydrochloride (C7H9NO2SHCl) contains an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 3.0, corresponding to approximately 3 ring(s) or double-bond equivalent(s). With a molecular weight of 207.67 g/mol, it falls into the medium-molecular-weight range. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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.
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 | C7H9NO2S HCl |
| Molecular Weight | 207.67 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1984 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Methyl Standards
- 3-Amino-1-methyl-4-phenoxyindazole (CAS 1000018-07-4)
- 3-Amino-2,6-dibromo-5-ethoxypyridine (CAS 1000018-10-9)
- Methyl 2-amino-5-bromo-4-isopropylbenzoate (CAS 1000018-13-2)
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- 100005-23-0 2-Amino-4-(4-methoxyphenyl)-5-methylthiophene-3-carbonitrile 7050AC C13H12N2OS (CAS 100005-23-0)
- Methyl 1-amino-4-cyano-1H-pyrrole-2-carboxylate (CAS 1000313-12-1)
- 6-Amino-7-hydroxy-2,3-dihydro-1H-inden-1-one hydrobromide (CAS 1000333-87-8)
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Recommended Standards
- N-(3-cyano-4,5,6,7-tetrahydrobenzo[b]thiophen-2-yl)cyclopropanecarboxamide (CAS 355000-40-7)
- CAY10471 (CAS 627865-18-3)
- 3-(4-Sulfamoylphenyl)propanoic acid (CAS 90610-69-8)
- 3-(4-Chlorophenyl)-5-oxopyrrolidine-2-carboxylic acid (CAS 1026093-70-8)
- Tert-butyl (3R,4R)-4-(aminomethyl)-3-fluoropiperidine-1-carboxylate (CAS 1932103-83-7)
- Methyl3-(tert-butoxycarbonylamino)-5-methoxy-pyridine-2-carboxylate (CAS 1211592-51-6)
- 5-Bromo-1-ethyl-1H-pyrazole-4-carbaldehyde (CAS 1780579-42-1)
- 7-(Trifluoromethyl)indoline (CAS 959236-00-1)
- 2-(3-Azaspiro[5.5]Undecan-9-yl)acetic acid (CAS 1356386-18-9)
- Semaglutide Impurity 11 (CAS CATO-C4X-222611)
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