Glutathione EP Impurity A CAS 19246-18-5
| CAS No. | 19246-18-5 |
| Molecular Formula | C5H10N2O3S |
| Molecular Weight | 178.21 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| 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 Glutathione EP Impurity A.
CATO supplies Glutathione EP Impurity A (CAS 19246-18-5), a pharmacopoeial impurity reference standard (molecular formula C5H10N2O3S, MW 178.21 g/mol) used for the identification and quantification of trace impurities in APIs.
Based on its molecular formula C5H10N2O3S, Glutathione EP Impurity A contains an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage; these features give the compound characteristic functional-group stretching vibrations in infrared spectroscopy. The molecular weight of 178.21 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
This reference standard supports related-substances testing and method development in line with ICH Q3A/Q3B guidance on impurity control, and is suitable for system suitability testing and forced-degradation studies.
As a certified reference material (CRM), Glutathione EP Impurity A 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 | C5H10N2O3S |
| Molecular Weight | 178.21 g/mol |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 2.0 |
| CAS Registry Year (est.) | 1962 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Glutathione Standards
- Glutathione EP Impurity D (CAS 636-58-8)
- Glutathione Impurity 16 (CAS CATO-C4X-118516)
- Glutathione Impurity 18 (CAS CATO-C4X-118518)
- Glutathione Impurity 27 (CAS CATO-C4X-118527)
- Glutathione (CAS 1432061-73-6)
- Glutathione (1S, 2R)-Isomer (CAS 274260-05-8)
- Glutathione Reduced (CAS 70-18-8)
- Glutathione-(glycine- (CAS 815610-65-2)
Recommended Standards
- 1640AF 883531-12-2 C10H11FN2 [(5-Fluoro-1H-indol-2-yl)methyl]-methylamine (CAS 883531-12-2)
- Nifuratel Impurity 21 (CAS CATO-C4X-127221)
- 23152-97-8 3-Phenyl-1,2,4-oxadiazole-5-thiol 7869AD C8H6N2OS (CAS 23152-97-8)
- H-Gly-Cys-OH (CAS 57281-78-4)
- Revefenacin impurity 110 (CAS CATO-C4X-2031110)
- Empagliflozin Impurity 2 (CAS 2517968-35-1)
- Lercanidipine Impurity 55 (CAS CATO-C4X-136455)
- 2-(2-(2-Chlorophenyl)-4-oxoquinazolin-3(4H)-yl)ethyl 2-nitrobenzoate (CAS 90094-96-5)
- 10-Methyl-4,8-bis(trifluoromethyl)-1,2,3,4-tetrahydropyrido[2',3':3,4]pyrazolo[1,5-a]pyrimidine (CAS 832141-55-6)
- N-((1-Cyclopentyl-1H-pyrazol-4-yl)methyl)-1,4-dimethyl-1H-pyrazol-3-amine hydrochloride (CAS 1855951-77-7)
- Potassium Phthalate Monobasic (CAS 877-24-7)
- Ethyl 2-amino-5-bromo-4-methylbenzoate (CAS 1476761-80-4)
- 2-Acetamido-3-(1-methylindolin-5-yl)propanoic acid (CAS 1404879-89-5)
- Tirzepatide Impurity 45 (CAS CATO-C4X-324045)
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