Methyl 5-(5-chlorothiophen-2-yl)-3-methyl-5-oxopentanoate CAS 1443320-83-9
| CAS No. | 1443320-83-9 |
| Molecular Formula | C11H13ClO3S |
| Molecular Weight | 260.74 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Methyl 5-(5-chlorothiophen-2-yl)-3-methyl-5-oxopentanoate.
Methyl 5-(5-chlorothiophen-2-yl)-3-methyl-5-oxopentanoate (CAS 1443320-83-9), molecular formula C11H13ClO3S and molecular weight 260.74 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C11H13ClO3S, Methyl 5-(5-chlorothiophen-2-yl)-3-methyl-5-oxopentanoate 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 260.74 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.
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 | C11H13ClO3S |
| Molecular Weight | 260.74 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), keep sealed and dry, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1992 |
| Halogen Content | Cl-containing |
| Sulfur Atoms | 1 |
Related Methyl Standards
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Recommended Standards
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- Chlorambucil EP Impurity A (CAS 27171-89-7)
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- 2-Chloro-N,N-dipropylacetamide (CAS 2315-37-9)
- (2,5-Dimethylphenyl)(phenyl)methanone (CAS 4044-60-4)
- 5-Bromo-2-(methoxymethyl)pyrimidine-4-carboxylic acid (CAS 1267654-44-3)
- 2-(Benzylthio)-4,5-diphenyl-1-propyl-1H-imidazole (CAS 338412-79-6)
- 3-(4-Methoxy-2-methylphenyl)propanoic acid (CAS 28353-93-7)
- 6-(4-Chlorophenyl)-2-oxo-1,2-dihydropyridine-3-carbonitrile (CAS 23148-51-8)
- N1-(Pyridin-3-yl)benzene-1,4-diamine (CAS 863221-54-9)
- Tau Peptide (295-309) trifluoroacetate salt (CAS 330456-46-7)
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