ortho-iodoHoechst 33258 CAS 158013-41-3
| CAS No. | 158013-41-3 |
| Molecular Formula | C25H23IN6 |
| Molecular Weight | 534.39 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 534.39 g/mol gives ortho-iodoHoechst 33258 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
ortho-iodoHoechst 33258 (CAS 158013-41-3), molecular formula C25H23IN6 and molecular weight 534.39 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, ortho-iodoHoechst 33258 (C25H23IN6) contains a nitrogen-containing heterocyclic scaffold, a nitrile group, iodine substitution. The molecule exhibits a degree of unsaturation (DBE) of 17.0, corresponding to approximately 17 ring(s) or double-bond equivalent(s). With a molecular weight of 534.39 g/mol, it falls into the moderately-high-molecular-weight range. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), ortho-iodoHoechst 33258 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.
Physical & Chemical Properties
| Molecular Formula | C25H23IN6 |
| Molecular Weight | 534.39 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at room temperature, 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) | 17.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2002 |
| Halogen Content | I-containing |
| Nitrogen Atoms | 6 |
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