Methyl 2-(5-chlorothiophen-2-yl)acetate CAS 71637-28-0
| CAS No. | 71637-28-0 |
| Molecular Formula | C7H7ClO2S |
| Molecular Weight | 190.65 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Methyl 2-(5-chlorothiophen-2-yl)acetate 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.
Methyl 2-(5-chlorothiophen-2-yl)acetate (CAS 71637-28-0), molecular formula C7H7ClO2S and molecular weight 190.65 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C7H7ClO2S, Methyl 2-(5-chlorothiophen-2-yl)acetate contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 190.65 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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.
Physical & Chemical Properties
| Molecular Formula | C7H7ClO2S |
| Molecular Weight | 190.65 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1977 |
| Halogen Content | Cl-containing |
| Sulfur Atoms | 1 |
Related Methyl Standards
- 2-(5-Chlorothiophen-2-yl)propanoic acid (CAS 1215995-07-5)
- 3-(5-Chlorothiophen-2-yl)propanoic acid (CAS 69300-47-6)
- 1-(5-Chlorothiophen-2-yl)butan-1-ol (CAS 1216048-84-8)
- 1-(5-Chlorothiophen-2-yl)butan-2-ol (CAS 1247485-30-8)
- 4-(5-Chlorothiophen-2-yl)butan-2-ol (CAS 1285576-86-4)
- 2-(5-Chlorothiophen-2-yl)butan-2-ol (CAS 1379334-15-2)
- 1-(5-Chlorothiophen-2-yl)-2-methylpropan-2-ol (CAS 887576-13-8)
- (5-Chlorothiophen-2-yl)trimethylsilane (CAS 23395-56-4)
Recommended Standards
- Famotidine Impurity 02 (CAS 81152-53-6)
- Methyl 3-(chloromethyl)thiophene-2-carboxylate (CAS 478628-20-5)
- Ethyl 5-Chlorothiophene-2-carboxylate (CAS 5751-82-6)
- Methyl 3-chloro-5-methylthiophene-2-carboxylate (CAS 229343-19-5)
- 7-Iodo-2,3-dihydro-[1,4]dioxino[2,3-b]pyridine (CAS 1228666-55-4)
- ((2R,3S,4R,5R)-5-(6-Amino-8-((2-(3-aminopropanamido)ethyl)amino)-9H-purin-9-yl)-3,4-dihydroxytetrahydrofuran-2-yl)methyl dihydrogen phosphate (CAS 62209-03-4)
- 1-(4-(2-Aminophenyl)piperazin-1-yl)ethan-1-one (CAS 91646-45-6)
- 4-(4-Amino-phenyl)-7-(2-dimethylamino-ethoxy)-benzo[d]isoxazol-3-ylamine (CAS 1380571-79-8)
- 6-Benzyl-2-chloro-8-methyl-5,6,7,8-tetrahydro-1,6-naphthyridine (CAS 1151665-28-9)
- 4-[2-(2-methoxyethoxy)ethoxy]butanenitrile (CAS 1566897-75-3)
- (S)-Ethyl 2-amino-2-(5-bromo-1H-indol-3-yl)acetate hydrochloride (CAS 1384268-49-8)
- (2,4,5-Trimethylphenyl)methanol (CAS 4393-05-9)
- 2,5,5-Trimethyl-2,5-dihydro-1H-1,2,4-triazol-3-amine (CAS 773810-77-8)
- Semaglutide impurity 78 (CAS CATO-C4X-222678)
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