Pentoxifylline Impurity 16 CAS 6493-06-7
| CAS No. | 6493-06-7 |
| Molecular Formula | C13H20N4O3 |
| Molecular Weight | 280.32 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
CATO supplies Pentoxifylline Impurity 16 (CAS 6493-06-7), a pharmacopoeial impurity reference standard (molecular formula C13H20N4O3, MW 280.32 g/mol) used for the identification and quantification of trace impurities in APIs.
Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, Pentoxifylline Impurity 16 is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 280.32 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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.
Physical & Chemical Properties
| Molecular Formula | C13H20N4O3 |
| Molecular Weight | 280.32 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.) | 1958 |
| Nitrogen Atoms | 4 |
Related Pentoxifylline Standards
- Pentoxifylline Impurity 29 (CAS CATO-C4X-172829)
- Pentoxifylline impurity 35 (CAS CATO-C4X-172835)
- Pentoxifylline M4 (CAS 38975-44-9)
- Pentoxifylline (CAS 6493-05-6)
- Pentoxifylline EP Impurity G (CAS 93079-86-8)
- Pentoxifylline D5 (CAS 1185995-18-9)
- Pentoxifylline Impurity 18 (CAS 1185878-98-1)
- Pentoxifylline D6 (CAS CATO-C4X-172840)
Recommended Standards
- N-Nitroso Mirtazapine EP Impurity D (CAS CATO-C4X-151120)
- Loxoprofen Impurity 4 (CAS CATO-C4X-14884)
- Artemisitene (CAS 101020-89-7)
- Zolpidem Acid Impurity 2 (CAS 189005-44-5)
- Nebivolol Impurity 72 (CAS CATO-C4X-196872)
- Pomalidomide Impurity 46 (CAS 944709-53-9)
- Bedaquiline Impurity 4 (CAS 654655-69-3)
- 4-((Furan-2-ylmethyl)thio)piperidine (CAS 1250777-84-4)
- 3-Ethyl-5-hydroxy-1,3-dimethylindol-2-one (CAS 120713-59-9)
- Arotinolol Impurity 51 (CAS CATO-C4X-185451)
- tert-Butyl 7-oxa-2-azaspiro[3.5]nonane-2-carboxylate (CAS 1934950-79-4)
- N-Nitroso Trazodone EP Impurity L (CAS 2219339-13-4)
- 1-(4-Phenoxyphenoxy)-2-propanol (CAS 57650-78-9)
- (Gly1,Ser3·22,Gln?·3?,Thr?,Arg1?,Tyr21,Ala23·31,Aib32)-Pancreatic Polypeptide (human) (CAS 313988-89-5)
Why CATO?
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- 130,000+ catalog items in stock, COA supplied with every batch
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- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com