Pentoxifylline Impurity N4 CAS 84321-40-4
| CAS No. | 84321-40-4 |
| Molecular Formula | C13H20N4O4 |
| Molecular Weight | 296.32 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
CATO supplies Pentoxifylline Impurity N4 (CAS 84321-40-4), a pharmacopoeial impurity reference standard (molecular formula C13H20N4O4, MW 296.32 g/mol) used for the identification and quantification of trace impurities in APIs.
Structurally, Pentoxifylline Impurity N4 (C13H20N4O4) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 6.0, corresponding to approximately 6 ring(s) or double-bond equivalent(s). With a molecular weight of 296.32 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).
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 | C13H20N4O4 |
| Molecular Weight | 296.32 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | >95% |
| 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) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1981 |
| Nitrogen Atoms | 4 |
Related Pentoxifylline Standards
- Pentoxifylline Impurity 26 (CAS CATO-C4X-172826)
- Pentoxifylline impurity 37 (CAS CATO-C4X-172837)
- Pentoxifylline Impurity 17 (CAS 1185995-26-9)
- Pentoxifylline Impurity 18 (CAS 1185878-98-1)
- Pentoxifylline D6 (CAS CATO-C4X-172840)
- Pentoxifylline D5 (CAS 1185995-18-9)
- Pentoxifylline Impurity 16 (CAS 6493-06-7)
- Pentoxifylline Impurity 29 (CAS CATO-C4X-172829)
Recommended Standards
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- Atomoxetine Impurity 25 (CAS CATO-C4X-155025)
- Riociguat Impurity N13 (CAS 6017-21-6)
- 1-(4-Fluorophenyl)-3-azabicyclo[3.1.0]hexane-2,4-dione (CAS 66504-49-2)
- 2-Methyl-6-(trifluoromethyl)nicotinohydrazide (CAS 402479-94-1)
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- 2',4'-Dimethoxy-[1,1'-biphenyl]-3-amine hydrochloride (CAS 1189425-56-6)
- Tenofovir disoproxil Impurity 135 (CAS CATO-C4X-1076135)
- Rel-((2S,4S)-4-fluoro-1-(thiophen-2-ylmethyl)pyrrolidin-2-yl)methanamine (CAS 1807941-84-9)
- MOTS-c Peptide (CAS 1627580-64-6)
Why CATO?
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