2-(3-Ethyl-5-(2-(3-ethylthiazolidin-2-ylidene)ethylidene)-4,4'-dioxo-2'-thioxo-4,5-dihydro-2'H,3H-[2,5'-bithiazolylidene]-3'(4'H)-yl)acetic acid CAS 93857-81-9
| CAS No. | 93857-81-9 |
| Molecular Formula | C17H19N3O4S4 |
| Molecular Weight | 457.61 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 457.61 g/mol gives 2-(3-Ethyl-5-(2-(3-ethylthiazolidin-2-ylidene)ethylidene)-4,4'-dioxo-2'-thioxo-4,5-dihydro-2'H,3H-[2,5'-bithiazolylidene]-3'(4'H)-yl)acetic acid distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
2-(3-Ethyl-5-(2-(3-ethylthiazolidin-2-ylidene)ethylidene)-4,4'-dioxo-2'-thioxo-4,5-dihydro-2'H,3H-[2,5'-bithiazolylidene]-3'(4'H)-yl)acetic acid (CAS 93857-81-9) is a high-purity analytical reference standard with the molecular formula C17H19N3O4S4 and a molecular weight of 457.61 g/mol.
The molecular framework of 2-(3-Ethyl-5-(2-(3-ethylthiazolidin-2-ylidene)ethylidene)-4,4'-dioxo-2'-thioxo-4,5-dihydro-2'H,3H-[2,5'-bithiazolylidene]-3'(4'H)-yl)acetic acid (C17H19N3O4S4) is characterized by a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. 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. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C17H19N3O4S4 |
| Molecular Weight | 457.61 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°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) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1983 |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 4 |
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