Fasudil impurity 66 CAS CATO-C4X-136566
| CAS No. | CATO-C4X-136566 |
| Molecular Formula | C14H16N4O3S |
| Molecular Weight | 320.37 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Structurally, Fasudil impurity 66 (C14H16N4O3S) contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 9.0, corresponding to approximately 9 ring(s) or double-bond equivalent(s). With a molecular weight of 320.37 g/mol, it falls into the moderately-high-molecular-weight range. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
CATO supplies Fasudil impurity 66 (CAS CATO-C4X-136566), a pharmacopoeial impurity reference standard (molecular formula C14H16N4O3S, MW 320.37 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.
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 | C14H16N4O3S |
| Molecular Weight | 320.37 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 4 |
| Sulfur Atoms | 1 |
Related Fasudil Standards
- Fasudil impurity 33 (CAS CATO-C4X-136562)
- Fasudil Impurity 47 (CAS 105628-70-4)
- Fasudil Hydroxy (CAS 105628-72-6)
- Fasudil Impurity 9 (CAS 1350827-92-7)
- Fasudil impurity 65 (CAS CATO-C4X-136565)
- Fasudil Impurity 26 (CAS 4392-52-3)
- Fasudil Impurity 14 (CAS CATO-C4X-136514)
- Fasudil Impurity 24 (CAS CATO-C4X-136524)
Recommended Standards
- (2S,4S)-4-Fluoro-1-[2-[[(1R,3S)-3-(1H-1,2,4-triazol-1-ylmethyl)cyclopentyl]amino]acetyl]-2-pyrrolidinecarbonitrile 868771-57-7 Melogliptin (CAS 868771-57-7)
- Glipizide EP Impurity A (CAS 33288-71-0)
- tert-butyl (2S,4R)-4-azido-2-(methylsulfonyloxymethyl)pyrrolidine-1-carboxylate (CAS 2509477-37-4)
- Glipizide EP Impurity D (CAS 1346600-54-1)
- Edaravone impurity 48 (CAS 87343-64-4)
- Telmisartan Impurity 97 (CAS CATO-C4X-135997)
- Empagliflozin impurity 202 (CAS CATO-C4X-1065202)
- 6-Nitro-1H-indole-3-carbaldehyde (CAS 10553-13-6)
- Tert-butyl (s)-3-(4-amino-2-fluorophenoxy)pyrrolidine-1-carboxylate (CAS 1286208-83-0)
- 1-Isopropylpiperidine-3-carboxylic acid hydrochloride 4485AE 50678-87-0 C9H18ClNO2 (CAS 50678-87-0)
- 5-((3,4-Dichlorobenzyl)thio)-1,3,4-thiadiazol-2-amine (CAS 384816-41-5)
- 2-Bromo-5-propylpyridine (CAS 1159821-61-0)
- 2-(Carboxymethyl)-5-iodobenzoic acid (CAS 423178-18-1)
- Semaglutide impurity 107 (CAS CATO-C4X-2226107)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
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- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com