Sulfadoxine impurity 15 CAS 7749-17-9
| CAS No. | 7749-17-9 |
| Molecular Formula | C13H17N5O3S |
| Molecular Weight | 323.37 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage, Sulfadoxine impurity 15 is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 323.37 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).
As a process- or degradation-related impurity, Sulfadoxine impurity 15 (CAS 7749-17-9, C13H17N5O3S) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
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 | C13H17N5O3S |
| Molecular Weight | 323.37 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1959 |
| Nitrogen Atoms | 5 |
| Sulfur Atoms | 1 |
Related Sulfadoxine Standards
Recommended Standards
- tert-Butyl 1-[2-(methoxycarbonyl)-3-thienyl]-5-methyl-1H-1,2,3-triazole-4-carboxylate (CAS 860611-40-1)
- Gefapixant Impurity 2 (CAS CATO-C4X-28492)
- N-[1-[(3S)-3-Mercapto-1-pyrrolidinyl]ethylidene]carbamic Acid (4-Nitrophenyl)methyl Ester (CAS 90505-36-5)
- Metazachlor-ethane sulfonic acid (ESA) (CAS 172960-62-2)
- Torasemide Impurity 7 (CAS 106944-62-1)
- Vonoprazan Fumarate Impurity 18 (CAS 1883595-37-6)
- Umeclidinium Impurity 16 (CAS 939900-20-6)
- 80304-48-9 (1-Cyclohexyl-1H-imidazol-5-yl)methanol DTXSID80608821 (CAS 80304-48-9)
- 1-Methyl-4-(methylsulphinyl)benzene 1-methanesulfinyl-4-methylbenzene 934-72-5 (CAS 934-72-5)
- AZD-6482 (S) (CAS 1173900-37-2)
- N-(3-aminobenzyl)cyclopropanesulfonamide (CAS 947672-46-0)
- 6-(3,4-Dimethoxyphenyl)nicotinic Acid (CAS 887976-58-1)
- 3-Fluoro-8-isopropylquinolin-2-ol (CAS 550346-21-9)
- D-Ser32-Tirzepatide (CAS CATO-CPTD788692)
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