2,5-Dichloro-3-methylthiophene CAS 17249-90-0
| CAS No. | 17249-90-0 |
| Molecular Formula | C5H4Cl2S |
| Molecular Weight | 167.06 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The molecular framework of 2,5-Dichloro-3-methylthiophene (C5H4Cl2S) is characterized by sulfur-containing functionality, chlorine substitution. In reversed-phase chromatography, its retention is governed primarily by the polarity and ionization state of its functional groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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).
2,5-Dichloro-3-methylthiophene (CAS 17249-90-0) is a high-purity analytical reference standard with the molecular formula C5H4Cl2S and a molecular weight of 167.06 g/mol.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C5H4Cl2S |
| Molecular Weight | 167.06 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO |
| Stability | May oxidize slowly on prolonged air exposure |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1961 |
| Halogen Content | Cl-containing |
| Sulfur Atoms | 1 |
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Recommended Standards
- 1305351-51-2 Thiophene, 4-chloro-2-(chloromethyl)- (CAS 1305351-51-2)
- 2-(Dichloromethyl)thiophene (CAS 36953-55-6)
- 3-chloro-2-(chloromethyl)thiophene (CAS 112433-47-3)
- 2,3,5,6-Tetrafluoropyridin-4-ol (CAS 2693-66-5)
- Methyl 2-amino-6-fluoro-3-methylbenzoate (CAS 1184353-61-4)
- 6-Amino-2H-benzo[b][1,4]thiazin-3(4H)-one (CAS 21762-78-7)
- tert-Butyl (2-hydroxyethyl)(isopropyl)carbamate (CAS 610309-73-4)
- 2-((5-(Benzylthio)-1,3,4-thiadiazol-2-yl)thio)-N'-(2-hydroxybenzylidene)acetohydrazide (CAS 315201-01-5)
- 1-(4,4-Dimethylcyclohexyl)cyclopropan-1-amine (CAS 1503109-22-5)
- 3,5-Diethyl-1-phenyl-1h-pyrazole-4-carboxylic acid (CAS 1002899-44-6)
- N-(3-Isopropoxybenzyl)(4-methoxyphenyl)methanamine (CAS 1040686-65-4)
- Cinobufotalin (CAS 1108-68-5)
- 2-(2-(Trifluoromethyl)benzyl)quinuclidin-3-one (CAS 477848-23-0)
- Semaglutide Impurity 167 (CAS CATO-C4X-2226167)
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