β-Estradiol 3,17-DisulfateDISCONTINUED, offer E888945 CAS 3233-70-3
| CAS No. | 3233-70-3 |
| Molecular Formula | C18H24O8S2 |
| Molecular Weight | 432.51 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including β-Estradiol 3,17-DisulfateDISCONTINUED, offer E888945.
β-Estradiol 3,17-DisulfateDISCONTINUED, offer E888945 (CAS 3233-70-3), molecular formula C18H24O8S2 and molecular weight 432.51 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a flavonoid core, a sulfone group, a hydroxyl group, an ether linkage, β-Estradiol 3,17-DisulfateDISCONTINUED, offer E888945 is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 432.51 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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), β-Estradiol 3,17-DisulfateDISCONTINUED, offer E888945 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 | C18H24O8S2 |
| Molecular Weight | 432.51 g/mol |
| Purity | 97%+ |
| Storage | Store at room temperature, 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Sulfur Atoms | 2 |
Related Estradiol Standards
- Estradiol Impurity 43 (CAS 19590-55-7)
- Estradiol Impurity 35 (CAS 1373116-15-4)
- Estradiol Impurity 31 (CAS CATO-C4X-163631)
- Estradiol Impurity 49 (CAS CATO-C4X-163649)
- Estradiol Impurity 39 (CAS 50394-95-1)
- Estradiol Valerate Impurity 20 (CAS CATO-C4X-284220)
- Estradiol Valerate EP Impurity E (CAS 63042-28-4)
- Estradiol Valerate EP Impurity H (CAS 1421283-56-8)
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Why CATO?
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