Acetylcysteine Impurity 19 CAS 2885-79-2
| CAS No. | 2885-79-2 |
| Molecular Formula | C6H11NO3S |
| Molecular Weight | 177.22 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The molecular framework of Acetylcysteine Impurity 19 (C6H11NO3S) is characterized by an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
Acetylcysteine Impurity 19 (CAS 2885-79-2) is a certified pharmaceutical impurity reference standard with the molecular formula C6H11NO3S and a molecular weight of 177.22 g/mol.
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), Acetylcysteine Impurity 19 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 | C6H11NO3S |
| Molecular Weight | 177.22 g/mol |
| Purity | 97%+ |
| 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.) | 1957 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Acetylcysteine Standards
- Acetylcysteine Impurity 41 (CAS 13100-82-8)
- N-Acetylcysteine-d3 (CAS 131685-11-5)
- Acetylcysteine impurity 66 (CAS 16708-09-1)
- Acetylcysteine Impurity 22 (CAS 60333-15-5)
- Acetylcysteine Impurity 20 (CAS CATO-C4X-153220)
- Acetylcysteine Impurity 37 (CAS 155172-79-5)
- Acetylcysteine Impurity 14 (CAS 62305-89-9)
- Acetylcysteine Impurity N1 (CAS 6436-58-4)
Recommended Standards
- Pidotimod Impurity 10 (CAS CATO-C4X-107810)
- DL-Piperacillin EP Impurity I (CAS 158411-82-6)
- N-Acetyl-L-cysteine methyl ester (CAS 7652-46-2)
- Piperacillin EP Impurity I (CAS 13833-89-1)
- Minodronic Impurity 22 (CAS 1507308-67-9)
- Ziprasidone EP Impurity D HCl (CAS 1303996-68-0（free base）)
- Fulvestrant Impurity 12 (CAS CATO-C4X-191712)
- 4-(4-Methoxyphenyl)isoxazolo[3,4-d]pyridazin-7(6H)-one (CAS 952182-88-6)
- 1-(3,5-Dimethyl-1H-pyrazol-1-yl)-2-(5-(p-tolylamino)-1,3,4-thiadiazol-2-yl)ethan-1-one (CAS 1326902-49-1)
- Methyl 5-bromo-2,3-dihydro-1h-indole-6-carboxylate (CAS 1788041-64-4)
- n-(4-Cyclopropylthiazol-2-yl)pivalamide (CAS 1457259-96-9)
- Tert-butyl 7-methyl-2,8-diazaspiro[4.5]Decane-2-carboxylate (CAS 1781882-02-7)
- Levothyroxine Impurity 25 (CAS CATO-C4X-167825)
- Neuropeptide Y (2-36) (human, rat) trifluoroacetate salt (CAS 123139-39-9)
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