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Cleanchem is a trusted provider of premium pharmaceutical reference materials, specializing in Estetrol and its associated compounds. Our catalog includes pharmacopeial and non-pharmacopeial Estetrol impurities, metabolites, nitrosamine derivatives (N-NO compounds), and stable isotope-labeled products. These reference standards play a critical role in pharmaceutical R&D, supporting activities such as product formulation, ANDA and DMF submissions, quality assurance, analytical method development, and stability assessments.
All Estetrol-related substances undergo comprehensive characterization and are delivered with complete Certificates of Analysis and supporting analytical documentation to ensure regulatory adherence. Upon request, we can offer EP/USP traceable standards. Our products are routinely re-evaluated to maintain consistent quality and performance.

Estetrol
CAT No: CL-ETRL-01 CAS No: 15183-37-6 Mol Wt: 304.4 Mol F: C18H24O4 Inv Status: Custom Synthesis
Chemical Name: (8R,9S,13S,14S,15R,16R,17R)-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,15,16,17-tetraol
Estetrol Impurity 1
CAT No: CL-ETRL-02 CAS No: NA Mol Wt: 504.2 Mol F: C20H24Br2O5 Inv Status: Custom Synthesis
Chemical Name: (8R,9S,13S,14S,15R,16R,17R)-2,4-dibromo-3,15,16-trihydroxy-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-17-yl acetate
Estetrol Impurity 2
CAT No: CL-ETRL-03 CAS No: NA Mol Wt: 300.4 Mol F: C18H20O4 Inv Status: Custom Synthesis
Chemical Name: (8R,9S,13S,17R)-3,15,17-trihydroxy-13-methyl-6,7,8,9,11,12,13,17-octahydro-16H-cyclopenta[a]phenanthren-16-one
Estetrol Impurity 3
CAT No: CL-ETRL-04 CAS No: NA Mol Wt: 302.4 Mol F: C18H22O4 Inv Status: Custom Synthesis
Chemical Name: (8S,13S,14S,15R,16R,17R)-13-methyl-7,8,12,13,14,15,16,17-octahydro-6H-cyclopenta[a]phenanthrene-3,15,16,17-tetraol
Estetrol Impurity 4
CAT No: CL-ETRL-05 CAS No: 1426679-39-1 Mol Wt: 418.6 Mol F: C24H38O4Si Inv Status: Custom Synthesis
Chemical Name: (8R,9S,13S,14S,15R,16R,17R)-3-((Tert-butyldimethylsilyl)oxy)-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-15,16,17-triol
Estetrol Impurity 5
CAT No: CL-ETRL-06 CAS No: NA Mol Wt: 304.4 Mol F: C18H24O4 Inv Status: Custom Synthesis
Chemical Name: (8R,9S,13S,14S,15R,16R,17S)-13-Methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,15,16,17-tetraol
6-Oxo-Estetrol
CAT No: CL-ETRL-07 CAS No: 59996-11-1 Mol Wt: 318.4 Mol F: C18H22O5 Inv Status: Custom Synthesis
Chemical Name: (8R,9S,13S,14S,15R,16R,17R)-3,15,16,17-tetrahydroxy-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-6-one
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