Estrone 3-Sulfate CAS 481-97-0
| CAS No. | 481-97-0 |
| Molecular Formula | C18H22O5S |
| Molecular Weight | 350.43 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Estrone 3-Sulfate (C18H22O5S) contains a flavonoid core, a sulfone group, a hydroxyl group, an ether linkage. The carboxyl group imparts weak acidity; 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).
Estrone 3-Sulfate (CAS 481-97-0), molecular formula C18H22O5S and molecular weight 350.43 g/mol, is a CATO reference standard with documented purity and traceability.
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 | C18H22O5S |
| Molecular Weight | 350.43 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Sulfur Atoms | 1 |
Related Estrone Standards
- Estrone 3-O-Sulfamate (CAS 148672-09-7)
- Estrone Enol Diacetate (CAS 20592-42-1)
- Estrone 3-Valerate (CAS 128788-26-1)
- Estrone Impurity 11 (CAS CATO-C4X-210511)
- Estrone 3-Sulfate-d5 Sodium Salt (CAS CATO-C4X-21053)
- Estrone Impurity 12 (CAS CATO-C4X-210512)
- Estrone 17-Ethylene ketal (CAS 900-83-4)
- Estrone 16-Oxime (CAS 6038-23-9)
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