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Cleanchem is a trusted provider of premium pharmaceutical reference materials, specializing in Fulvestrant and its associated compounds. Our catalog includes pharmacopeial and non-pharmacopeial Fulvestrant 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 Fulvestrant-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.

Fulvestrant
CAT No: CL-FUV-01 CAS No: 129453-61-8 Mol Wt: 606.8 Mol F: C32H47F5O3S Inv Status: Custom Synthesis
Chemical Name: 7a-[9-[(RS)-(4,4,5,5,5-Pentafluoropentyl)sulfinyl]nonyl]estra-1,3,5(10)-triene-3,17?diol (7a,17?-; 7a-[9-[(4,4,5,5,5,-Pentafluoropentyl)sulfinyl]non yl]estra-1,3,5(10)-triene-3,17?diol (as per USP)
Fulvestrant EP Impurity A
CAT No: CL-FUV-02 CAS No: 407577-53-1 Mol Wt: 606.8 Mol F: C32H47F5O3S Inv Status: Custom Synthesis
Chemical Name: 7?[9-[(RS)-(4,4,5,5,5-pentafluoropentyl)sulfinyl]nonyl]estra-1,3,5(10)-triene-3,17?diol ; 7?{9-[(4,4,5,5,5,-Pentafluoropentyl)sulfinyl]nonyl}estra-1,3,5(10)-triene-3,17?diol (as per USP)
Fulvestrant EP Impurity B
CAT No: CL-FUV-03 CAS No: 98008-06-1 Mol Wt: 622.8 Mol F: C32H47F5O4S Inv Status: Custom Synthesis
Chemical Name: 7a-[9-[(4,4,5,5,5-pentafluoropentyl)sulfonyl]nonyl]estra-1,3,5(10)-triene-3,17?diol ; 7a-{9-[(4,4,5,5,5,-Pentafluoropentyl)sulfonyl]nonyl}estra-1,3,5(10)-triene-3,17?diol (as per USP)
Fulvestrant EP Impurity C
CAT No: CL-FUV-04 CAS No: 2482852-42-4 Mol Wt: 781.1 Mol F: C41H65F5O4S2 Inv Status: Custom Synthesis
Chemical Name: 7?-[9-[[9-[(4,4,5,5,5-pentafluoropentyl)sulfinyl]nonyl]sulfinyl]nonyl]estra-1,3,5(10)-triene-3,17?diol ; Estra-1,3,5(10)-triene-3,17-diol,7-{9-[9-[(4,4,5,5,5-pentafluoro pentyl)sulfinyl]nonylsulfinyl]nonyl}-(7a,17? (as per USP)
Fulvestrant EP Impurity D
CAT No: CL-FUV-05 CAS No: NA Mol Wt: 669 Mol F: C45H64O4 Inv Status: Custom Synthesis
Chemical Name: 7?,7'?-nonane-1,9-diylbis[estra-1,3,5(10)-triene-3,17?diol] ; 7a,7a-Nonamethylenebis[estra-1,3,5(10)-triene-3,17?diol] (as per USP)
Fulvestrant EP Impurity E
CAT No: CL-FUV-06 CAS No: 2170200-14-1 Mol Wt: 604.8 Mol F: C32H45F5O3S Inv Status: Custom Synthesis
Chemical Name: 7-[9-[(4,4,5,5,5-Penta?uoropentyl)sul?nyl]nonyl]estra-1,3,5(10),6-tetraene-3,17?diol ; Estra-1,3,5(10),6-tetraene-3,17-diol,7-[9-[(4,4,5,5,5-pentafluoropentyl)sul finyl]nonyl]-(7a,17? (as per USP)
Fulvestrant EP Impurity F
CAT No: CL-FUV-07 CAS No: NA Mol Wt: 620.8 Mol F: C32H45F5O4S Inv Status: Custom Synthesis
Chemical Name: 3,17?Dihydroxy-7?-[9-[(4,4,5,5,5-pentafluoropentyl)sulfinyl]nonyl]estra-1,3,5(10)-trien-6-one ; Estra-1,3,5(10)-triene-6-one-3,17-diol,7-[9-[(4,4,5,5,5-pentafluoro pentyl)sulfinyl]nonyl]-(7a,17? (as per USP)
Fulvestrant Impurity 8 FV
CAT No: CL-FUV-08 CAS No: NA Mol Wt: 706.8 Mol F: C34H47F9O3S Inv Status: Custom Synthesis
Chemical Name: (7R,8R,9S,13S,14S,17S)-13-methyl-7-(9-((4,4,5,5,6,6,7,7,7-nonafluoroheptyl)sulfinyl)nonyl)-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,17-diol
Fulvestrant-3-Glucuronide
CAT No: CL-FUV-09 CAS No: 261506-27-8 Mol Wt: 782.9 Mol F: C38H55F5O9S Inv Status: Custom Synthesis
Chemical Name: (2S,3S,4S,5R,6S)-3,4,5-Trihydroxy-6-(((7R,8R,9S,13S,14S,17S)-17-hydroxy-13-methyl-7-(9-((4,4,5,5,5-pentafluoropentyl)sulfinyl)nonyl)-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-3-yl)oxy)tetrahydro-2H-pyran-2-carboxylic acid
Fulvestrant-17-Glucuronide
CAT No: CL-FUV-10 CAS No: 261506-28-9 Mol Wt: 782.9 Mol F: C38H55F5O9S Inv Status: Custom Synthesis
Chemical Name: (2S,3S,4S,5R,6R)-3,4,5-Trihydroxy-6-(((7R,8R,9S,13S,14S,17S)-3-hydroxy-13-methyl-7-(9-((4,4,5,5,5-pentafluoropentyl)sulfinyl)nonyl)-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-17-yl)oxy)tetrahydro-2H-pyran-2-carboxylic acid
Fulvestrant-3-Sulfate
CAT No: CL-FUV-11 CAS No: 261506-26-7 Mol Wt: 686.8 Mol F: C32H47F5O6S2 Inv Status: Custom Synthesis
Chemical Name: (7R,8R,9S,13S,14S,17S)-17-Hydroxy-13-methyl-7-(9-((4,4,5,5,5-pentafluoropentyl)sulfinyl)nonyl)-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-3-yl hydrogen sulfate
17-Keto Fulvestrant
CAT No: CL-FUV-12 CAS No: 403656-89-3 Mol Wt: 604.8 Mol F: C32H45F5O3S Inv Status: Custom Synthesis
Chemical Name: (7R,8R,9S,13S,14S)-3-Hydroxy-13-methyl-7-(9-((4,4,5,5,5-pentafluoropentyl)sulfinyl)nonyl)-6,7,8,9,11,12,13,14,15,16-decahydro-17H-cyclopenta[a]phenanthren-17-one
Fulvestrant Side Chain Impurity
CAT No: CL-FUV-13 CAS No: 148757-89-5 Mol Wt: 399.3 Mol F: C14H24BrF5S Inv Status: Custom Synthesis
Chemical Name: (9-Bromononyl)(4,4,5,5,5-pentafluoropentyl)sulfane
Fulvestrant Impurity 1
CAT No: CL-FUV-14 CAS No: NA Mol Wt: 753.1 Mol F: C49H68O6 Inv Status: Custom Synthesis
Chemical Name: (8R,8'R,9S,9'S,13S,13'S,14S,14'S,17S,17'S)-Nonane-1,9-diylbis(3-hydroxy-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-7,17-diyl) diacetate
Fulvestrant Impurity 2
CAT No: CL-FUV-15 CAS No: 1621885-80-0 Mol Wt: 534.8 Mol F: C30H46O6S Inv Status: Custom Synthesis
Chemical Name: (7S,8R,9S,13S,14S,17S)-3-Hydroxy-13-methyl-7-(9-((methylsulfonyl)oxy)nonyl)-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-17-yl acetate
Fulvestrant Impurity 3
CAT No: CL-FUV-16 CAS No: 1621885-81-1 Mol Wt: 548.7 Mol F: C30H44O7S Inv Status: Custom Synthesis
Chemical Name: (7S,8R,9S,13S,14S,17S)-3-Hydroxy-13-methyl-7-(9-((methylsulfonyl)oxy)nonyl)-6-oxo-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-17-yl acetate
Fulvestrant Impurity 4
CAT No: CL-FUV-17 CAS No: 1621885-82-2 Mol Wt: 532.8 Mol F: C30H44O6S Inv Status: Custom Synthesis
Chemical Name: (8R,9S,13S,14S,17S)-3-Hydroxy-13-methyl-7-(9-((methylsulfonyl)oxy)nonyl)-8,9,12,13,14,15,16,17-octahydro-11H-cyclopenta[a]phenanthren-17-yl acetate
Fulvestrant Chlora BANA
CAT No: CL-FUV-18 CAS No: 2490287-82-4 Mol Wt: 475.1 Mol F: C29H43ClO3 Inv Status: Custom Synthesis
Chemical Name: (7R,8R,9S,13S,14S,17S)-7-(9-Chlorononyl)-3-hydroxy-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-17-yl acetate
Fulvestrant Intermediat-TBDMS Chain
CAT No: CL-FUV-19 CAS No: 149051-24-1 Mol Wt: 337.4 Mol F: C15H33BrOSi Inv Status: Custom Synthesis
Chemical Name: ((9-Bromononyl)oxy)(tert-butyl)dimethylsilane
Pentafluoro Pentanethiol
CAT No: CL-FUV-20 CAS No: 148757-88-4 Mol Wt: 194.2 Mol F: C5H7F5S Inv Status: Custom Synthesis
Chemical Name: 4,4,5,5,5-Pentafluoropentane-1-thiol
Fulvestrant Impurity 5
CAT No: CL-FUV-21 CAS No: NA Mol Wt: 843.3 Mol F: C54H82O5S Inv Status: Custom Synthesis
Chemical Name: (7R,7'R,8R,8'R,9S,9'S,13S,13'S,14S,14'S,17S,17'S)-7,7'-(Sulfinylbis(nonane-9,1-diyl))bis(13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,17-diol)
Fulvestrant Impurity 23
CAT No: CL-FUV-22 CAS No: 875573-63-0 Mol Wt: 521.6 Mol F: C29H45BrO3 Inv Status: Custom Synthesis
Chemical Name: (7R,8R,9S,10R,13S,14S,17S)-7-(9-Bromononyl)-13-methyl-3-oxo-2,3,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl acetate
Fulvestrant Impurity 24
CAT No: CL-FUV-23 CAS No: NA Mol Wt: 696.9 Mol F: C39H53F5O3S Inv Status: Custom Synthesis
Chemical Name: (8R,9S,13S,14S,17S)-3-(Benzyloxy)-13-methyl-7-(9-((4,4,5,5,5-pentafluoropentyl)sulfinyl)nonyl)-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-17-ol
Fulvestrant Impurity 26
CAT No: CL-FUV-24 CAS No: 2170233-15-3 Mol Wt: 775 Mol F: C42H63F5O5S Inv Status: Custom Synthesis
Chemical Name: (7S,8R,9S,13S,14S,17S)-13-Methyl-7-(9-((4,4,5,5,5-pentafluoropentyl)thio)nonyl)-3,17-bis((tetrahydro-2H-pyran-2-yl)oxy)-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-6-ol
Fulvestrant Impurity 7
CAT No: CL-FUV-25 CAS No: 148043-73-6 Mol Wt: 178.1 Mol F: C5H7F5O Inv Status: Custom Synthesis
Chemical Name: 4,4,5,5,5-Pentafluoropentan-1-ol
Fulvestrant Impurity 8
CAT No: CL-FUV-26 CAS No: 252947-01-6 Mol Wt: 256.2 Mol F: C6H9F5O3S Inv Status: Custom Synthesis
Chemical Name: 4,4,5,5,5-Pentafluoropentyl methanesulfonate
Fulvestrant Impurity 10
CAT No: CL-FUV-27 CAS No: 1354395-98-4 Mol Wt: 476.4 Mol F: C18H36Br2S2 Inv Status: Custom Synthesis
Chemical Name: 1,2-Bis(9-bromononyl)disulfane
Fulvestrant Impurity 11
CAT No: CL-FUV-28 CAS No: 1391053-14-7 Mol Wt: 557.6 Mol F: C23H42BrF5S2 Inv Status: Custom Synthesis
Chemical Name: (9-Bromononyl)(9-((4,4,5,5,5-pentafluoropentyl)thio)nonyl)sulfane
Fulvestrant Impurity 12
CAT No: CL-FUV-29 CAS No: NA Mol Wt: 519.6 Mol F: C29H43BrO3 Inv Status: Custom Synthesis
Chemical Name: (7R,8R,9S,13S,14S,17R)-7-(9-Bromononyl)-3-hydroxy-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-17-yl acetate
Fulvestrant Impurity 13
CAT No: CL-FUV-30 CAS No: NA Mol Wt: 598.5 Mol F: C29H42Br2O3 Inv Status: Custom Synthesis
Chemical Name: (7R,8R,9S,13S,14S,17S)-4-Bromo-7-(9-bromononyl)-3-hydroxy-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-17-yl acetate
Fulvestrant Impurity 14
CAT No: CL-FUV-31 CAS No: 1428539-56-3 Mol Wt: 561.6 Mol F: C31H45BrO4 Inv Status: Custom Synthesis
Chemical Name: (7R,8R,9S,13S,14S,17S)-7-(9-Bromononyl)-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,17-diyl diacetate
Fulvestrant Impurity 15
CAT No: CL-FUV-32 CAS No: NA Mol Wt: 899.4 Mol F: C58H90O7 Inv Status: Custom Synthesis
Chemical Name: (7R)-7-(9-((9-((7S)-17-Acetoxy-13-methyl-3-oxo-2,3,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-7-yl)nonyl)oxy)nonyl)-13-methyl-3-oxo-2,3,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl acetate
Fulvestrant Impurity 16
CAT No: CL-FUV-33 CAS No: NA Mol Wt: 958.2 Mol F: C58H85BrO6 Inv Status: Custom Synthesis
Chemical Name: (7S)-3-((9-((7R)-17-Acetoxy-3-hydroxy-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-7-yl)nonyl)oxy)-7-(9-bromononyl)-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-17-yl acetate
Fulvestrant Impurity 17
CAT No: CL-FUV-34 CAS No: 66263-02-3 Mol Wt: 314.4 Mol F: C20H26O3 Inv Status: Custom Synthesis
Chemical Name: (8R,9S,10R,13S,14S,17R)-13-methyl-3-oxo-2,3,8,9,10,11,12,13,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-17-yl acetate
Fulvestrant Impurity 18
CAT No: CL-FUV-35 CAS No: NA Mol Wt: 771.1 Mol F: C50H74O6 Inv Status: Custom Synthesis
Chemical Name: Decane-1,10-diylbis(13-methyl-3-oxo-2,3,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthrene-17,7-diyl) diacetate
Fulvestrant Impurity 19
CAT No: CL-FUV-36 CAS No: 6728-21-8 Mol Wt: 136.2 Mol F: C4H8O3S Inv Status: Custom Synthesis
Chemical Name: Allyl methanesulfonate
Fulvestrant Impurity 20
CAT No: CL-FUV-37 CAS No: NA Mol Wt: 382.1 Mol F: C6H8F5IO3S Inv Status: Custom Synthesis
Chemical Name: 4,4,5,5,5-Pentafluoro-2-iodopentyl methanesulfonate
Fulvestrant Impurity 21
CAT No: CL-FUV-38 CAS No: 23433-07-0 Mol Wt: 160.3 Mol F: C9H20O2 Inv Status: Custom Synthesis
Chemical Name: Nonane-1,3-diol
Fulvestrant Impurity 22
CAT No: CL-FUV-39 CAS No: 875573-60-7 Mol Wt: 572.9 Mol F: C35H60O4Si Inv Status: Custom Synthesis
Chemical Name: (7R,8R,9S,10R,13S,14S,17S)-7-(9-((Tert-butyldimethylsilyl)oxy)nonyl)-13-methyl-3-oxo-2,3,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl acetate
Fulvestrant Impurity 27
CAT No: CL-FUV-40 CAS No: 875573-64-1 Mol Wt: 458.7 Mol F: C29H46O4 Inv Status: Custom Synthesis
Chemical Name: (7R,8R,9S,10R,13S,14S,17S)-7-(9-hydroxynonyl)-13-methyl-3-oxo-2,3,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl acetate
Fulvestrant Impurity 28
CAT No: CL-FUV-41 CAS No: NA Mol Wt: 827.3 Mol F: C54H82O4S Inv Status: Custom Synthesis
Chemical Name: (7R,7'R,8R,8'R,9S,9'S,13S,13'S,14S,14'S,17S,17'S)-7,7'-(thiobis(nonane-9,1-diyl))bis(13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,17-diol)
S-Deoxo Fulvestrant
CAT No: CL-FUV-42 CAS No: 153004-31-0 Mol Wt: 590.8 Mol F: C32H47F5O2S Inv Status: Custom Synthesis
Chemical Name: (7R,8R,9S,13S,14S,17S)-13-Methyl-7-(9-((4,4,5,5,5-pentafluoropentyl)thio)nonyl)-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,17-diol
S-Deoxo-6-oxo Fulvestrant
CAT No: CL-FUV-43 CAS No: 1107606-70-1 Mol Wt: 604.8 Mol F: C32H45F5O3S Inv Status: Custom Synthesis
Chemical Name: (7S,8R,9S,13S,14S,17S)-3,17-dihydroxy-13-methyl-7-(9-((4,4,5,5,5-pentafluoropentyl)thio)nonyl)-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-6-one
Fulvestrant D3
CAT No: CL-FUV-44 CAS No: NA Mol Wt: 609.8 Mol F: C32H44D3F5O3S Inv Status: Custom Synthesis
Chemical Name: (7R,8R,9S,13S,14S,17S)-13-Methyl-7-(9-((4,4,5,5,5-pentafluoropentyl)sulfinyl)nonyl)-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-16,16,17-d3-3,17-diol
Fulvestrant D4
CAT No: CL-FUV-45 CAS No: NA Mol Wt: 610.8 Mol F: C32H43D4F5O3S Inv Status: Custom Synthesis
Chemical Name: (7R,8R,9S,13S,14S,17S)-13-Methyl-7-(9-((4,4,5,5,5-pentafluoropentyl)sulfinyl)nonyl-1,1,9,9-d4)-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,17-diol
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