(S)-4,4-Dimethyl-pyrrolidine-2-carboxylic acid ethyl ester tosylate CAS 1965305-31-0
| CAS No. | 1965305-31-0 |
| Molecular Formula | C7H8O3S |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
(S)-4,4-Dimethyl-pyrrolidine-2-carboxylic acid ethyl ester tosylate (CAS 1965305-31-0) is a high-purity analytical reference standard with the molecular formula C7H8O3SC9H17NO2 and a molecular weight of 343.44 g/mol.
Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage, (S)-4,4-Dimethyl-pyrrolidine-2-carboxylic acid ethyl ester tosylate is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 343.44 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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 | C7H8O3S C9H17NO2 |
| Molecular Weight | 343.44 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1996 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
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Recommended Standards
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- 2-chloro-5-iodo-3-(trifluoromethyl)pyridine (CAS 887707-25-7)
- 4-Ethyl-5-(4-nitrophenyl)-4h-1,2,4-triazole-3-thiol (CAS 29527-36-4)
- Ledipasvir Impurity 34 (CAS CATO-C4X-331334)
- 4-Chloro-2-((3-chlorobenzyl)amino)thiazole-5-carbonitrile (CAS 866155-94-4)
- Benzyl (4'-formyl-[1,1'-biphenyl]-4-yl)carbamate (CAS 939758-25-5)
- 2-(5-Amino-2-methoxyphenyl)ethanol (CAS 354516-88-4)
- Semaglutide impurity 101 (CAS CATO-C4X-2226101)
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