5-Chloro-2-ethylthiophene-3-carbaldehyde CAS 1823018-41-2
| CAS No. | 1823018-41-2 |
| Molecular Formula | C7H7ClOS |
| Molecular Weight | 174.65 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-Chloro-2-ethylthiophene-3-carbaldehyde (CAS 1823018-41-2), molecular formula C7H7ClOS and molecular weight 174.65 g/mol, is a CATO reference standard with documented purity and traceability.
5-Chloro-2-ethylthiophene-3-carbaldehyde (C7H7ClOS) contains sulfur-containing functionality, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system. Halogen substitution raises its density and boiling point; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
As a certified reference material (CRM), 5-Chloro-2-ethylthiophene-3-carbaldehyde 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 | C7H7ClOS |
| Molecular Weight | 174.65 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 |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1995 |
| Halogen Content | Cl-containing |
| Sulfur Atoms | 1 |
Related Chloro Standards
- 2-Chloro-6-(ethylsulfanyl)pyrazine (CAS 1094842-83-7)
- 4-Chloro-2-(Sulfanylmethyl)phenol (CAS 118143-41-2)
- 1-(4-Chloro-5-methylthiophen-2-yl)ethan-1-one (CAS 123418-42-8)
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Recommended Standards
- 2-Chloro-4-(methylsulfanyl)phenol (CAS 17733-32-3)
- ((Chloromethyl)sulfinyl)benzene (CAS 7205-94-9)
- 4-Chloro-6-methyl-2-(methylthio)pyrimidine (CAS 17119-73-2)
- 1-(4-(Chloromethyl)thiophen-2-yl)ethanone (CAS 33148-79-7)
- (1R,3S,5R)-2-Azabicyclo[3.1.0]hexane-3-carboxamide (CAS 700376-57-4)
- Flubendazole (CAS 31430-15-6)
- (3-methyloxetan-3-yl)methanesulfonyl chloride (CAS 1134111-88-8)
- Lithium 3-(2-(4-benzoylpiperazin-1-yl)-2-oxoacetyl)-4-methoxy-7-(3-methyl-1H-1,2,4-triazol-1-yl)pyrrolo[2,3-c]pyridin-1-ide (CAS 1449413-05-1)
- 4-Bromo-2,3,5,6-tetramethylbenzoic acid (CAS 3360-64-3)
- 4-(tert-Butyl)-N-(4-ethylphenyl)aniline (CAS 642473-66-3)
- 3,4-Bis(bromomethyl)benzonitrile (CAS 66126-17-8)
- Methyl 1,2,3,4-tetrahydroquinoline-5-carboxylate hydrochloride (CAS 1334147-75-9)
- 1-(3-Chlorophenyl)-5-(3-nitrophenyl)-1h-imidazole-2-thiol (CAS 1105189-18-1)
- Semaglutide Impurity 142 (CAS CATO-C4X-2226142)
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