Doxofylline Impurity 31 CAS CATO-C4X-151331
| CAS No. | CATO-C4X-151331 |
| Molecular Formula | C9H12N4O4 |
| Molecular Weight | 240.22 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Doxofylline Impurity 31.
Doxofylline Impurity 31 (CAS CATO-C4X-151331) is a certified pharmaceutical impurity reference standard with the molecular formula C9H12N4O4 and a molecular weight of 240.22 g/mol.
The molecular framework of Doxofylline Impurity 31 (C9H12N4O4) is characterized by an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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.
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 | C9H12N4O4 |
| Molecular Weight | 240.22 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (faint amine-like odor) |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| 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 |
| Nitrogen Atoms | 4 |
Related Doxofylline Standards
- Doxofylline Impurity 28 (CAS 62637-09-6)
- Doxofylline Impurity 1 (CAS 1429636-74-7)
- Doxofylline Impurity 12 (CAS 652-37-9)
- Doxofylline Impurity 20 (CAS 1021-65-4)
- Doxofylline Impurity 40 (CAS 23146-07-8)
- Doxofylline impurity 46 (CAS CATO-C4X-151346)
- Doxofylline Impurity 23 (CAS 27231-68-1)
- Doxofylline Impurity 8 (CAS 123524-29-8)
Recommended Standards
- Adenine Impurity 2 (CAS CATO-C4X-25912)
- Cyclosporin Impurity 16 (CAS 79309-68-5)
- 7-Fluoro-3-phenylcoumarin (CAS 1031929-17-5)
- 1-(2,4-dimethoxyphenyl)-2,2,2-trifluoroethanone 1-(2,4-dimethoxyphenyl)-2,2,2-tris(fluoranyl)ethanone 578-16-5 A831619 (CAS 578-16-5)
- Tadalafil Impurity 84 (CAS CATO-C4X-108784)
- Tedizolid Impurity 44 (CAS 92159-87-0)
- Delgocitinib impurity 1 (CAS CATO-C4X-33081)
- 2-(4-Bromo-2-chlorophenyl)acetic Acid (CAS 916516-89-7)
- 1346598-78-4 2-(2-Methoxyphenyl)-1-[1-(~2~H_11_)pentyl-1H-indol-3-yl]ethan-1-one DTXSID10857901 (CAS 1346598-78-4)
- 6-(3-Formylphenyl)nicotinic acid (CAS 566198-35-4)
- (2,4-Dimethylpyridin-3-yl)methanol (CAS 194151-96-7)
- (S)-2-(2,2-Dimethyl-1,3-dioxolan-4-yl)ethan-1-amine (CAS 1008526-48-4)
- 2-Bromo-1-(6-methoxypyridin-2-yl)ethan-1-one (CAS 1186113-50-7)
- Semaglutide impurity 210 (CAS CATO-C4X-2226210)
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