51811-82-6 Azure eosin methylene blue Azure mixture sicc. Giemsa stain Giemsa Solution Giemsa Stain, Modified Solution Giemsa stain Giemsa stain solution Giemsa stain, modified CAS 51811-82-6
| CAS No. | 51811-82-6 |
| Molecular Formula | C14H20N3S |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
51811-82-6 Azure eosin methylene blue Azure mixture sicc. Giemsa stain Giemsa Solution Giemsa Stain, Modified Solution Giemsa stain Giemsa stain solution Giemsa stain, modified (CAS 51811-82-6), molecular formula C14H20N3SCl and molecular weight 297.85 g/mol, is a CATO reference standard with documented purity and traceability.
51811-82-6 Azure eosin methylene blue Azure mixture sicc. Giemsa stain Giemsa Solution Giemsa Stain, Modified Solution Giemsa stain Giemsa stain solution Giemsa stain, modified (C14H20N3SCl) contains a nitrogen-containing heterocyclic scaffold, a nitrile group, sulfur-containing functionality, chlorine substitution. Halogen substitution raises its density and boiling point, its high carbon-to-hydrogen ratio confers good lipid solubility; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C14H20N3S Cl |
| Molecular Weight | 297.85 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| 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) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1971 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
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