Sildenafil Impurity 299 CAS CATO-C4X-1128299
| CAS No. | CATO-C4X-1128299 |
| Molecular Formula | C13H18N2O5S |
| Molecular Weight | 314.36 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Sildenafil Impurity 299 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.
CATO supplies Sildenafil Impurity 299 (CAS CATO-C4X-1128299), a pharmacopoeial impurity reference standard (molecular formula C13H18N2O5S, MW 314.36 g/mol) used for the identification and quantification of trace impurities in APIs.
Based on its molecular formula C13H18N2O5S, Sildenafil Impurity 299 contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 314.36 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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 | C13H18N2O5S |
| Molecular Weight | 314.36 g/mol |
| 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 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Sildenafil Standards
- Sildenafil Impurity 69 (CAS CATO-C4X-112869)
- Sildenafil Impurity 77 (CAS CATO-C4X-112877)
- Sildenafil Impurity 2 (CAS 332374-42-2)
- Sildenafil Impurity 31 (CAS CATO-C4X-112831)
- Sildenafil Impurity 259 (CAS CATO-C4X-1128259)
- Sildenafil Impurity 101 (CAS CATO-C4X-1128101)
- Sildenafil Impurity 92 (CAS CATO-C4X-112892)
- Sildenafil Impurity 263 (CAS CATO-C4X-1128263)
Recommended Standards
- Vonoprazan Impurity 272 (CAS CATO-C4X-1020272)
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- Febuxostat Impurity 110 (CAS 1346238-12-7)
- L-Ornithine L-Aspartate Impurity 19 (CAS 60259-82-7)
- Bumetanide Impurity 25 (CAS 105641-65-4)
- Dotinurad Impurity 181 (CAS 425666-79-1)
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- Methyl 2,3,4,6-tetrakis-O-(phenylmethyl)-α-D-glucopyranoside (CAS 17791-37-6)
- 5-Fluoro-1-methyl-1H-benzo[d]imidazol-2(3H)-one (CAS 401567-11-1)
- 6-Amino-5-(2,2-dimethoxyethyl)-2-methylpyrimidin-4(1H)-one (CAS 1269293-64-2)
- Benzyl 2,3-dihydroxypropanoate (CAS 73573-57-6)
- 2-[4-(Morpholin-4-ylsulfonyl)phenyl]isoindolin-1-imine hydrobromide (CAS 1049745-70-1)
- Angiotensin III Antipeptide (CAS 133605-55-7)
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