Emtricitabine Impurity B CAS CATO-C4X-123237
| CAS No. | CATO-C4X-123237 |
| Molecular Formula | 2*C8H10FN3O3S |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Emtricitabine Impurity B (CAS CATO-C4X-123237) is a certified pharmaceutical impurity reference standard with the molecular formula C8H10FN3O3S and a molecular weight of 247.24 g/mol.
Structurally, Emtricitabine Impurity B (C8H10FN3O3S) contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage, fluorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 5.0, corresponding to approximately 5 ring(s) or double-bond equivalent(s). With a molecular weight of 247.24 g/mol, it falls into the medium-molecular-weight range. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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 | 2*C8H10FN3O3S |
| Molecular Weight | 247.24 g/mol |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | F-containing |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Emtricitabine Standards
- Emtricitabine impurity 61 (CAS 1055312-45-2)
- Emtricitabine Impurity 24 (CAS 1160303-44-5)
- Emtricitabine-13C,15N2 (CAS 1217820-69-3)
- Emtricitabine Impurity 1 (CAS 1238210-10-0)
- Emtricitabine Impurity 35 (CAS 1238210-14-4)
- Emtricitabine Impurity 7 Potassium salt (CAS 124356-72-5)
- Emtricitabine Impurity N2 (CAS 1246819-86-2)
- Emtricitabine Impurity 12 Sodium salt (CAS 127087-58-5)
Recommended Standards
- Fasudil Impurity 13 (CAS 56344-32-2)
- Ezetimibe Impurity 99 (CAS CATO-C4X-109899)
- Iodohippurate Dihydrate For Radiopharmaceutical Preparations EP Impurity A (CAS 88-67-5)
- 4,6-dichloro-2-methyl-pyridine-3-carbaldehyde (CAS 1589540-62-4)
- 2-(3-(((2-Hydroxypropyl)amino)methyl)-1H-indol-1-yl)acetic acid (CAS 1279208-29-5)
- 2,4-Dichloro-3-(difluoromethoxy)aniline (CAS 1803786-68-6)
- N-Cyclopropyl-2-methyl-5-nitroaniline (CAS 1250783-56-2)
- 7-(3,4-dimethoxyphenyl)-5-(ethylthio)imidazo[1,2-c]pyrimidine (CAS 371169-29-8)
- 2-Methyl-5-(trifluoromethyl)benzo[d]thiazole-6-carbonitrile (CAS 1190198-32-3)
- CBP501 Affinity Peptide trifluoroacetate salt (CAS 1351804-17-5)
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