Raltitrexed Impurity 44 CAS CATO-C4X-138644
| CAS No. | CATO-C4X-138644 |
| Molecular Formula | C8H11NO2S |
| Molecular Weight | 185.24 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies Raltitrexed Impurity 44 (CAS CATO-C4X-138644), a pharmacopoeial impurity reference standard (molecular formula C8H11NO2S, MW 185.24 g/mol) used for the identification and quantification of trace impurities in APIs.
Based on its molecular formula C8H11NO2S, Raltitrexed Impurity 44 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 185.24 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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 | C8H11NO2S |
| Molecular Weight | 185.24 g/mol |
| Purity | ≥95% |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Raltitrexed Standards
- Raltitrexed Impurity 18 (CAS CATO-C4X-138618)
- Raltitrexed Impurity 1 (CAS 1378372-01-0)
- Raltitrexed Impurity 4 (CAS 39978-57-9)
- Raltitrexed Impurity 46 (CAS CATO-C4X-138646)
- Raltitrexed Impurity 2 (CAS 18731-19-6)
- Raltitrexed Impurity 45 (CAS CATO-C4X-138645)
- Raltitrexed Impurity 6 (CAS 6317-37-9)
- Raltitrexed Impurity 5 (CAS 4282-31-9)
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Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
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- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com