5-Chloro-8-iodo-2-(methylthio)pyrido[4,3-d]pyrimidine CAS 1562987-80-7
| CAS No. | 1562987-80-7 |
| Molecular Formula | C8H5ClIN3S |
| Molecular Weight | 337.57 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
5-Chloro-8-iodo-2-(methylthio)pyrido[4,3-d]pyrimidine (CAS 1562987-80-7) is a high-purity analytical reference standard with the molecular formula C8H5ClIN3S and a molecular weight of 337.57 g/mol.
The molecular framework of 5-Chloro-8-iodo-2-(methylthio)pyrido[4,3-d]pyrimidine (C8H5ClIN3S) is characterized by a nitrogen-containing heterocyclic scaffold, a nitrile group, sulfur-containing functionality, chlorine/iodine substitution. 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. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
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 | C8H5ClIN3S |
| Molecular Weight | 337.57 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1993 |
| Halogen Content | Cl/I-containing |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
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