Tandospirone Impurity 4 CAS CATO-C4X-18754
| CAS No. | CATO-C4X-18754 |
| Molecular Formula | C21H27N5O2 |
| Molecular Weight | 381.47 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 381.47 g/mol gives Tandospirone Impurity 4 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
CATO supplies Tandospirone Impurity 4 (CAS CATO-C4X-18754), a pharmacopoeial impurity reference standard (molecular formula C21H27N5O2, MW 381.47 g/mol) used for the identification and quantification of trace impurities in APIs.
Owing to a steroid core, an amide group, a hydroxyl group, an ether linkage, Tandospirone Impurity 4 is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 381.47 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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).
Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.
As a certified reference material (CRM), Tandospirone Impurity 4 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 | C21H27N5O2 |
| Molecular Weight | 381.47 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| 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) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 5 |
Related Tandospirone Standards
- Tandospirone (CAS 87760-53-0)
- Tandospirone Impurity 2 (CAS CATO-C4X-18752)
- Tandospirone Impurity 7 (CAS CATO-C4X-18757)
- Tandospirone-d8 (CAS 1794835-73-6)
- Tandospirone N-Oxide Impurity 13 (CAS CATO-C4X-187513)
- Tandospirone N-Oxide Impurity 12 (CAS CATO-C4X-187515)
- Tandospirone Impurity 14 (CAS CATO-C4X-187514)
- Tandospirone Impurity 11 (CAS 105981-33-7)
Recommended Standards
- N-Nitroso Oseltamivir impurity 264 (CAS CATO-C4X-1720264)
- Revefenacin Impurity 55 (CAS CATO-C4X-203155)
- Oseltamivir Impurity 250 (CAS CATO-C4X-1720250)
- Bambuterol Impurity 10 (CAS CATO-C4X-274610)
- Roflumilast Impurity 36 (CAS CATO-C4X-108436)
- Cefoxitin EP Impurity I (CAS CATO-C4X-157813)
- Labetalol Impurity 65 (CAS CATO-C4X-246665)
- 6-(3,4-Dimethoxyphenyl)-2-((3-oxobutan-2-yl)thio)-4-(trifluoromethyl)nicotinonitrile (CAS 625376-78-5)
- 5-((2-Aminophenyl)amino)-2'-chloro-6'-fluoro-1,6-dihydro-[1,1'-biphenyl]-3(2H)-one (CAS 338400-89-8)
- N-((1'-benzyl-4',5'-dimethyl-1'H-[1,2'-bipyrrol]-3'-yl)methyl)-3-methylbenzamide (CAS 478077-36-0)
- 2-((3-Methyl-4-oxo-3,4-dihydroquinazolin-2-yl)thio)acetonitrile (CAS 79728-82-8)
- 2-(Benzyloxy)-6-chloroaniline (CAS 1436417-42-3)
- 2'-Bromo-14H-spiro[dibenzo[c,h]acridine-7,9'-fluorene] (CAS 1303969-20-1)
- Des-Leu14-Tirzepatide (CAS CATO-CPTD788959)
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