Estetrol Impurity 9 CAS 3088028-01-4
| CAS No. | 3088028-01-4 |
| Molecular Formula | C26H28O4 |
| Molecular Weight | 404.50 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies Estetrol Impurity 9 (CAS 3088028-01-4), a pharmacopoeial impurity reference standard (molecular formula C26H28O4, MW 404.50 g/mol) used for the identification and quantification of trace impurities in APIs.
Structurally, Estetrol Impurity 9 (C26H28O4) contains a steroid core, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 13.0, corresponding to approximately 13 ring(s) or double-bond equivalent(s). With a molecular weight of 404.50 g/mol, it falls into the moderately-high-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.
CATO manufactures Estetrol Impurity 9 under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C26H28O4 |
| Molecular Weight | 404.50 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | ≥98% |
| Storage | Store at room temperature, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 13.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2005 |
Related Estetrol Standards
- Estetrol Impurity 8 (CAS 28200-88-6)
- Estetrol Impurity 1 (CAS CATO-C4X-32501)
- Estetrol Impurity 2 (CAS CATO-C4X-32502)
- Estetrol Impurity 3 (CAS CATO-C4X-32503)
- Estetrol Impurity 10 (CAS 3088028-02-5)
- Estetrol 17-Acetate (CAS 690996-23-7)
- Estetrol Impurity 4 (CAS CATO-C4X-32504)
- Estetrol Impurity 5 (CAS CATO-C4X-32505)
Recommended Standards
- Boceprevir Impurity 11 (CAS CATO-C4X-252511)
- Boc-Trp(Boc)-OH (CAS 144599-95-1)
- Niraparib Impurity 41 (CAS CATO-C4X-232941)
- N-2-Benzyloxyphenyl α-Benzilidene-d5 Isobutyrylacetamide (CAS 1020719-18-9)
- Nizatidine EP Impurity E (CAS 188666-11-7)
- Daptomycin Impurity 25 (CAS CATO-C4X-137825)
- Eltrombopag Impurity 119 (CAS CATO-C4X-1198119)
- Ibrutinib Impurity 176 (CAS CATO-C4X-1064176)
- Vildagliptin Impurity 110 HCl (CAS CATO-C4X-1100110)
- Bis(2-butoxyethyl) 2-(3-Hydroxybutoxy)ethyl Phosphate Triester (CAS 1477494-87-3)
- 1-((4-Bromothiophen-2-yl)methyl)-4-methylpiperazine (CAS 364794-30-9)
- 5,7-Difluorobenzofuran-3(2h)-one (CAS 939759-28-1)
- N-Acetyl-S-(3-Oxopropyl)-L-Cysteine (CAS 140226-30-8)
- Des-Gly29,30-Tirzepatide (CAS CATO-CPTD788944)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com