Acetylcysteine impurity 66 CAS 16708-09-1
| CAS No. | 16708-09-1 |
| Molecular Formula | C6H9NO4S |
| Molecular Weight | 191.20 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Structurally, Acetylcysteine impurity 66 (C6H9NO4S) contains an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 3.0, corresponding to approximately 3 ring(s) or double-bond equivalent(s). With a molecular weight of 191.20 g/mol, it falls into the medium-molecular-weight range. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
CATO supplies Acetylcysteine impurity 66 (CAS 16708-09-1), a pharmacopoeial impurity reference standard (molecular formula C6H9NO4S, MW 191.20 g/mol) used for the identification and quantification of trace impurities in APIs.
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.
CATO manufactures Acetylcysteine impurity 66 under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C6H9NO4S |
| Molecular Weight | 191.20 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 | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1961 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Acetylcysteine Standards
- Acetylcysteine Impurity 18 (CAS 1637-71-4)
- Acetylcysteine Impurity 19 (CAS 2885-79-2)
- Acetylcysteine EP Impurity D (CAS 18725-37-6)
- Acetylcysteine Impurity 47 (CAS 74401-71-1)
- Acetylcysteine impurity 63 (CAS CATO-C4X-153263)
- Acetylcysteine Impurity 11 (CAS 79560-92-2)
- Acetylcysteine Impurity 41 (CAS 13100-82-8)
- N-Acetylcysteine-d3 (CAS 131685-11-5)
Recommended Standards
- Vonoprazan Fumarate Impurity 33 (CAS 881674-58-4)
- Lemborexant Impurity 38 (CAS 1450904-98-9)
- 898767-18-5 5-(3-Fluorophenyl)-5-oxopentanenitrile DTXSID90642216 (CAS 898767-18-5)
- OUL245 (CAS 1023814-45-0)
- Tapentadol EP Impurity A HCl (CAS 175591-10-3)
- Iguratimod Impurity 75 (CAS CATO-C4X-182675)
- N-Nitroso Tropicamide EP Impurity A (CAS 13256-23-0)
- 2-(Methylthio)-3-(m-tolyl)pyrimidin-4(3H)-one (CAS 89069-25-0)
- 3-(5-Bromothiophen-2-yl)-2-hydroxypropanoic acid (CAS 1493198-75-6)
- tert-butyl (2R)-2-(aminomethyl)morpholine-4-carboxylate acetate (CAS 1998701-09-9)
- (2E)-3-(Furan-2-yl)-N-[3-(trifluoromethyl)phenyl]prop-2-enamide (CAS 304475-91-0)
- 4-((2-Hydroxybenzylidene)amino)benzonitrile (CAS 33721-67-4)
- n-Isopropyldecahydro-1,3,5-(epimethanetriyl)cyclopenta[cd]pentalen-2-amine (CAS 1384428-07-2)
- Semaglutide impurity 94 (CAS CATO-C4X-222694)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com