5-Acetyl-2-amino-4-methylthiophene-3-carboxylic acid CAS 893644-86-5
| CAS No. | 893644-86-5 |
| Molecular Formula | C8H9NO3S |
| Molecular Weight | 199.23 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
5-Acetyl-2-amino-4-methylthiophene-3-carboxylic acid (CAS 893644-86-5) is a high-purity analytical reference standard with the molecular formula C8H9NO3S and a molecular weight of 199.23 g/mol.
Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage, 5-Acetyl-2-amino-4-methylthiophene-3-carboxylic acid is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 199.23 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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).
As a certified reference material (CRM), 5-Acetyl-2-amino-4-methylthiophene-3-carboxylic 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 | C8H9NO3S |
| Molecular Weight | 199.23 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) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Acetyl Standards
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Recommended Standards
- 5-Acetamido-3-methylthiophene-2-carboxylic acid (CAS 926270-99-7)
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- Ethyl 2-amino-4-thioxo-1,4-dihydropyrimidine-5-carboxylate (CAS 354788-58-2)
- (2S,3S,4S,5S,6R)-2-(2-azidoethoxy)-4-hydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-3,5-diyl dibenzoate (CAS 872100-81-7)
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