Ethyl 2-amino-5-methylthiophene-3-carboxylate CAS 4815-32-1
| CAS No. | 4815-32-1 |
| Molecular Formula | C8H11NO2S |
| Molecular Weight | 185.24 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
CATO supplies Ethyl 2-amino-5-methylthiophene-3-carboxylate (CAS 4815-32-1), a certified reference material (molecular formula C8H11NO2S, MW 185.24 g/mol) for analytical method development and quality control.
Ethyl 2-amino-5-methylthiophene-3-carboxylate (C8H11NO2S) contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage. The carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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 | C8H11NO2S |
| Molecular Weight | 185.24 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Ethyl Standards
- 2-Amino-4,5-dimethoxybenzenethiol (CAS 100601-30-7)
- 2-Amino-4-(thiophen-2-yl)butanoic acid (CAS 101861-70-5)
- (2S)-2-amino-4-(thiophen-2-yl)butanoic acid (CAS 1195573-02-4)
- Ethyl 4-amino-5-methylthiophene-2-carboxylate (CAS 1248109-35-4)
- (s)-3-Amino-3-(5-methylthiophen-2-yl)propanoic acid (CAS 1270051-55-2)
- (r)-3-Amino-3-(5-methylthiophen-2-yl)propanoic acid (CAS 1270272-47-3)
- Ethyl 5-amino-4-methylthiophene-3-carboxylate (CAS 1499649-62-5)
- Ethyl 2-amino-2-(thiophen-2-yl)acetate (CAS 154410-94-3)
Recommended Standards
- Ethyl 2-Amino-4-methyl-3-thiophenecarboxylate (CAS 43088-42-2)
- Ethyl 2-ethyl-1,3-thiazole-4-carboxylate (CAS 76706-67-7)
- Ethyl 2-amino-2-(thiophen-3-yl)acetate (CAS 500993-02-2)
- Ethyl 3-(4-phenyl-1-piperazinyl)propanoate, 97% (CAS 56968-65-1)
- Fmoc-D-Glu(OtBu)-OH hydrate (CAS 1899809-49-4)
- 7H-Benzo(C)Fluorene (CAS 205-12-9)
- 2-(1-Aminocyclopentyl)-5,6-dimethylpyrimidin-4(1H)-one (CAS 1334101-49-3)
- N-Desethyl Acetildenafil (CAS 147676-55-9)
- Imidazo[1,5-a]pyrazine-1-carboxylic acid, 5,6,7,8-tetrahydro-, ethyl ester (CAS 951627-01-3)
- 6-Amino-5-cyclopropoxy-N-methylnicotinamide (CAS 1243452-47-2)
- (R,S,R)-2-Acetyl-4-(1,2,3,4-tetrahydroxybutyl)-imidazole-13C6 (CAS 1448358-08-4)
- 4,7-Dimethylpyrazolo[5,1-c][1,2,4]triazine-3-carboxylic acid (CAS 175137-58-3)
- 4-Methyl-N-tosylbenzamide (CAS 120336-96-1)
- Semaglutide impurity 107 (CAS CATO-C4X-2226107)
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