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Type:Impurity Reference Standard
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Exemestane Related Products
Cleanchem is a trusted provider of premium pharmaceutical reference materials, specializing in Exemestane and its associated compounds. Our catalog includes pharmacopeial and non-pharmacopeial Exemestane 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 Exemestane-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.
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Exemestane EP Impurity D
CAT No: CL-E020401 CAS No: 897-06-3 Mol Wt: 284.4 Mol F: C19H24O2 Inv Status: In Stock
Chemical Name: ndrosta-1,4-diene-3,17-dione (as per EP & USP)
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Exemestane
CAT No: CL-EMTN-01 CAS No: 107868-30-4 Mol Wt: 296.4 Mol F: C20H24O2 Inv Status: Custom Synthesis
Chemical Name: 6-Methylideneandrosta-1,4-diene-3,17-dione ; 6-Methyleneandrosta-1,4-diene-3,17-dione (as per USP)
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Exemestane EP Impurity B
CAT No: CL-EMTN-02 CAS No: 184972-09-6 Mol Wt: 314.4 Mol F: C20H26O3 Inv Status: Custom Synthesis
Chemical Name: 6x-(hydroxymethyl)androsta-1,4-diene-3,17-dione ; 6-Hydroxymethylandrosta-1,4-diene-3,17-dione (as per USP)
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Exemestane EP Impurity C
CAT No: CL-EMTN-03 CAS No: NA Mol Wt: 308.4 Mol F: C21H24O2 Inv Status: Custom Synthesis
Chemical Name: 6,16-dimethylideneandrosta-1,4-diene-3,17-dione
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Exemestane EP Impurity D(HCL)
CAT No: CL-EMTN-04 CAS No: 897-06-3 Mol Wt: 284.4 : 36.5 Mol F: C19H24O2 Inv Status: Custom Synthesis
Chemical Name: Androsta-1,4-diene-3,17-dione (as per EP & USP)
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Exemestane EP Impurity E
CAT No: CL-EMTN-05 CAS No: 19457-55-7 Mol Wt: 298.4 Mol F: C20H26O2 Inv Status: In Stock
Chemical Name: 6-methylideneandrost-4-ene-3,17-dione ; 6-Methyleneandrosta-4-ene-3,17-dione (as per USP)
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Exemestane EP Impurity F
CAT No: CL-EMTN-06 CAS No: 72648-46-5 Mol Wt: 298.4 Mol F: C19H22O3 Inv Status: Custom Synthesis
Chemical Name: androsta-1,4-diene-3,6,17-trione
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Exemestane 17bHydroxy Exemestane
CAT No: CL-EMTN-07 CAS No: 122370-91-6 Mol Wt: 298.42 Mol F: C20H26O2 Inv Status: Custom Synthesis
Chemical Name: Methylene Boldenone17?Hydroxy Exemestane17?Hydroxy-6-methyleneandrosta-1,4-dien-3-one
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Exemestane 6-Hydroxymethyl Impurity
CAT No: CL-EMTN-08 CAS No: 152764-26-6 Mol Wt: 312.4 Mol F: C20H24O3 Inv Status: Custom Synthesis
Chemical Name: 6-(Hydroxymethyl)androsta-1,4,6-triene-3,17-dione
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Exemestane Diol Impurity
CAT No: CL-EMTN-09 CAS No: 184972-11-0 Mol Wt: 330.4 Mol F: C20H26O4 Inv Status: Custom Synthesis
Chemical Name: 6-Hydroxy-6-(hydroxymethyl)-androsta-1,4-diene-3,17-dione
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17-Beta-Hydroxy Exemestane Epoxide
CAT No: CL-EMTN-10 CAS No: 1331732-05-8 Mol Wt: 314.4 Mol F: C20H26O3 Inv Status: Custom Synthesis
Chemical Name: (10R,13S,17S)-17-Hydroxy-10,13-dimethyl-8,9,10,11,12,13,14,15,16,17-decahydrospiro[cyclopenta[a]phenanthrene-6,2'-oxiran]-3(7H)-one
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Epoxy Exemestane (6-Beta Isomer)
CAT No: CL-EMTN-11 CAS No: 152764-31-3 Mol Wt: 312.4 Mol F: C20H24O3 Inv Status: Custom Synthesis
Chemical Name: (6R,8R,9S,10R,13S,14S)-10,13-Dimethyl-7,8,9,10,11,12,13,14,15,16-decahydrospiro[cyclopenta[a]phenanthrene-6,2'-oxirane]-3,17-dione
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16?, 17?-Epoxy Exemestane
CAT No: CL-EMTN-12 CAS No: NA Mol Wt: 296.4 Mol F: C20H24O2 Inv Status: Custom Synthesis
Chemical Name: (6aR,6bS,8aS,8bS,9aR,10aS,10bR)-6a,8a-Dimethyl-2-methylene-1,2,6a,6b,7,8,8a,8b,9a,10,10a,10b-dodecahydro-4H-naphtho[2',1':4,5]indeno[1,2-b]oxiren-4-one
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Exemestane Metabolite 1
CAT No: CL-EMTN-13 CAS No: NA Mol Wt: 377.5 Mol F: C20H27NO4S Inv Status: Custom Synthesis
Chemical Name: (8R,9S,10R,13S,14S,17S)-10,13-Dimethyl-6-methylene-3-oxo-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-17-yl sulfamate
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Exemestane Metabolite 2
CAT No: CL-EMTN-14 CAS No: NA Mol Wt: 344.5 Mol F: C21H28O4 Inv Status: Custom Synthesis
Chemical Name: (8R,9S,10R,13S,14S)-6-Hydroxy-6-(methoxymethyl)-10,13-dimethyl-7,8,9,10,11,12,13,14,15,16-decahydro-3H-cyclopenta[a]phenanthrene-3,17(6H)-dione
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Exemestane Related Compound
CAT No: CL-EMTN-15 CAS No: 861398-01-8 Mol Wt: 328.5 Mol F: C21H28O3 Inv Status: Custom Synthesis
Chemical Name: (8R,9S,10R,13S,14S)-6-(Methoxymethyl)-10,13-dimethyl-7,8,9,10,11,12,13,14,15,16-decahydro-3H-cyclopenta[a]phenanthrene-3,17(6H)-dione
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Exemestane Related Compound 2
CAT No: CL-EMTN-17 CAS No: NA Mol Wt: 312.4 Mol F: C20H24O3 Inv Status: Custom Synthesis
Chemical Name: NA (8R,9S,10R,13S,14S)-17-Hydroxy-10,13-dimethyl-3-oxo-8,9,10,11,12,13,14,15,16,17-decahydro-3H-cyclopenta[a]phenanthrene-6-carbaldehyde
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Exemestane Related Compound 2 (17-Alpha Isomer)
CAT No: CL-EMTN-18 CAS No: NA Mol Wt: 312.4 Mol F: C20H24O3 Inv Status: Custom Synthesis
Chemical Name: (8R,9S,10R,13S,14S,17R)-17-Hydroxy-10,13-dimethyl-3-oxo-8,9,10,11,12,13,14,15,16,17-decahydro-3H-cyclopenta[a]phenanthrene-6-carbaldehyde
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Exemestane Related Compound 2 (17-Beta
CAT No: CL-EMTN-19 CAS No: NA Mol Wt: 312.4 Mol F: C20H24O3 Inv Status: Custom Synthesis
Chemical Name: (8R,9S,10R,13S,14S,17S)-17-Hydroxy-10,13-dimethyl-3-oxo-8,9,10,11,12,13,14,15,16,17-decahydro-3H-cyclopenta[a]phenanthrene-6-carbaldehyde
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Exemestane Impurity 1
CAT No: CL-EMTN-20 CAS No: 159354-61-7 Mol Wt: 312.4 Mol F: C20H24O3 Inv Status: Custom Synthesis
Chemical Name: (2aR,3aR,3bR,3cS,5aS,8aS,8bR)-3b,5a-Dimethyl-10-methylene-3a,3b,3c,4,5,5a,7,8,8a,8b,9,10-dodecahydro-2H-cyclopenta[7,8]phenanthro[3,4-b]oxirene-2,6(2aH)-dione
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Exemestane Impurity 4
CAT No: CL-EMTN-21 CAS No: 152764-24-4 Mol Wt: 312.4 Mol F: C20H24O3 Inv Status: Custom Synthesis
Chemical Name: (6S,8R,9S,10R,13S,14S)-10,13-Dimethyl-7,8,9,10,11,12,13,14,15,16-decahydrospiro[cyclopenta[a]phenanthrene-6,2'-oxirane]-3,17-dione
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Exemestane Impurity 5
CAT No: CL-EMTN-22 CAS No: 63-05-8 Mol Wt: 286.4 Mol F: C19H26O2 Inv Status: Custom Synthesis
Chemical Name: NA (8R,9S,10R,13S,14S)-10,13-Dimethyl-1,6,7,8,9,10,11,12,13,14,15,16-dodecahydro-3H-cyclopenta[a]phenanthrene-3,17(2H)-dione
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Epoxy Exemestane (6-Alfa Isomer)
CAT No: CL-EMTN-23 CAS No: 152764-24-4 Mol Wt: 312.4 Mol F: C20H24O3 Inv Status: Custom Synthesis
Chemical Name: (6S,8R,9S,10R,13S,14S)-10,13-Dimethyl-7,8,9,10,11,12,13,14,15,16-decahydrospiro[cyclopenta[a]phenanthrene-6,2'-oxirane]-3,17-dione
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Exemestane Impurity 6
CAT No: CL-EMTN-24 CAS No: NA Mol Wt: 328.4 Mol F: C20H24O4 Inv Status: Custom Synthesis
Chemical Name: (3bR,3cS,5aS,8aS,8bR,10S)-3b,5a-Dimethyl-2a,3a,3b,3c,4,5,5a,7,8,8a,8b,9-dodecahydrospiro[cyclopenta[7,8]phenanthro[3,4-b]oxirene-10,2'-oxirane]-2,6-dione
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Exemestane Impurity 7
CAT No: CL-EMTN-25 CAS No: NA Mol Wt: 328.5 Mol F: C22H32O2 Inv Status: Custom Synthesis
Chemical Name: (8R,9S,10R,13S,14S)-3-Ethoxy-10,13-dimethyl-6-methylene-1,2,3,6,7,8,9,10,11,12,13,14,15,16-tetradecahydro-17H-cyclopenta[a]phenanthren-17-one
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Exemestane Intermediate
CAT No: CL-EMTN-26 CAS No: 9/8/4954 Mol Wt: 284.4 Mol F: C19H24O2 Inv Status: Custom Synthesis
Chemical Name: NA (8R,9S,13S,14S)-1-Hydroxy-4,13-dimethyl-6,7,8,9,11,12,13,14,15,16-decahydro-17H-cyclopenta[a]phenanthren-17-one
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Epoxy Exemestane (6 Alpha , Beta Isomer)
CAT No: CL-EMTN-27 CAS No: 184972-12-1 Mol Wt: 312.4 Mol F: C20H24O3 Inv Status: Custom Synthesis
Chemical Name: (8R,9S,10R,13S,14S)-10,13-dimethyl-7,8,9,11,12,13,15,16-octahydrospiro[cyclopenta[a]phenanthrene-6,2'-oxirane]-3,17(10H,14H)-dione
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4-Chloro Exemestane
CAT No: CL-EMTN-28 CAS No: 107868-36-0 Mol Wt: 330.9 Mol F: C20H23ClO2 Inv Status: In Stock
Chemical Name: (8R,9S,10R,13S,14S)-4-Chloro-10,13-dimethyl-6-methylene-7,8,9,10,11,12,13,14,15,16-decahydro-3H-cyclopenta[a]phenanthrene-3,17(6H)-dione
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Exemestane Impurity 8
CAT No: CL-EMTN-29 CAS No: 1035-69-4 Mol Wt: 284.4 Mol F: C19H24O2 Inv Status: Custom Synthesis
Chemical Name: (8S,10S,13S,14S)-10,13-dimethyl-1,6,7,8,10,12,13,14,15,16-decahydro-3H-cyclopenta[a]phenanthrene-3,17(2H)-dione
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Exemestane Impurity 9
CAT No: CL-EMTN-30 CAS No: 68539-12-8 Mol Wt: 284.4 Mol F: C19H24O2 Inv Status: Custom Synthesis
Chemical Name: (10S,13S,14S)-10,13-dimethyl-1,6,7,10,11,12,13,14,15,16-decahydro-3H-cyclopenta[a]phenanthrene-3,17(2H)-dione
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Exemestane Impurity 10
CAT No: CL-EMTN-31 CAS No: 17305-49-6 Mol Wt: 284.4 Mol F: C19H24O2 Inv Status: Custom Synthesis
Chemical Name: Androsta-4,8(14)-diene-3,17-dione
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Exemestane Impurity 11
CAT No: CL-EMTN-32 CAS No: NA Mol Wt: 392.5 Mol F: C21H28O5S Inv Status: Custom Synthesis
Chemical Name: ((6S,8R,9S,10R,13S,14S)-10,13-Dimethyl-3,17-dioxo-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-6-yl)methyl methanesulfonate
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Exemestane Impurity 12
CAT No: CL-EMTN-33 CAS No: 152764-31-3 Mol Wt: 312.4 Mol F: C20H24O3 Inv Status: Custom Synthesis
Chemical Name: (2'R,8R,9S,10R,13S,14S)-10,13-dimethyl-7,8,9,11,12,13,15,16-octahydrospiro[cyclopenta[a]phenanthrene-6,2'-oxirane]-3,17(10H,14H)-dione
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Exemestane EP Impurity H
CAT No: CL-EMTN-34 CAS No: 122370-91-6 Mol Wt: 298.4 Mol F: C20H26O2 Inv Status: Custom Synthesis
Chemical Name: 17?-Hydroxy-6-methyleneandrosta-1,4-dien-3-one
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Exemestane EP Impurity I
CAT No: CL-EMTN-35 CAS No: NA Mol Wt: 326.4 Mol F: C21H26O3 Inv Status: Custom Synthesis
Chemical Name: 6-Methylidene-3-oxoandrosta-1,4-dien-17b-yl formate
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Exemestane EP Impurity J
CAT No: CL-EMTN-36 CAS No: 1160599-91-6 Mol Wt: 340.5 Mol F: C22H28O3 Inv Status: Custom Synthesis
Chemical Name: 6-Methylidene-3-oxoandrosta-1,4-dien-17?-yl acetate
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Exemestane Impurity 3
CAT No: CL-EMTN-37 CAS No: 2467590-81-2 Mol Wt: 296.4 Mol F: C20H24O2 Inv Status: Custom Synthesis
Chemical Name: 16-Methyleneandrosta-1,4-diene-3,17-dione
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Exemestane Impurity 15
CAT No: CL-EMTN-40 CAS No: 1204325-02-9 Mol Wt: 342.5 Mol F: C22H30O3 Inv Status: Custom Synthesis
Chemical Name: (8R,9S,10R,13S,14S,17R)-17-hydroxy-17-(1-hydroxyethyl)-10,13-dimethyl-6-methylene-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-3-one
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Exemestane Impurity 16
CAT No: CL-EMTN-41 CAS No: 571-44-8 Mol Wt: 288.4 Mol F: C19H28O2 Inv Status: Custom Synthesis
Chemical Name: (3S,8R,9S,10R,13S,14S)-3-Hydroxy-10,13-dimethyl-1,2,3,6,7,8,9,10,11,12,13,14,15,16-tetradecahydro-17H-cyclopenta[a]phenanthren-17-one
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Exemestane Impurity 17
CAT No: CL-EMTN-42 CAS No: 10104-53-7 Mol Wt: 300.4 Mol F: C19H24O3 Inv Status: Custom Synthesis
Chemical Name: (4aS,4bS,5aS,6aS,9aS,9bS)-4a,6a-dimethyl-4,4a,6,6a,8,9,9a,9b,10,11-decahydrocyclopenta[1,2]phenanthro[4,4a-b]oxirene-2,7(3H,5aH)-dione
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Exemestane Impurity 18
CAT No: CL-EMTN-43 CAS No: [1963-03-7] Mol Wt: 290.4 Mol F: C19H30O2 Inv Status: Custom Synthesis
Chemical Name: (3S,8R,9S,10R,13S,14S,17R)-10,13-Dimethyl-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthrene-3,17-diol
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Exemestane Impurity 19
CAT No: CL-EMTN-44 CAS No: 33805-57-1 Mol Wt: 288.4 Mol F: C19H28O2 Inv Status: Custom Synthesis
Chemical Name: (3S,5R,8R,9S,10R,13S,14S)-3-Hydroxy-10,13-dimethyl-3,4,5,6,7,8,9,10,11,12,13,14,15,16-tetradecahydro-17H-cyclopenta[a]phenanthren-17-one
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Exemestane Impurity 20
CAT No: CL-EMTN-45 CAS No: 600178-04-9 Mol Wt: 308.5 Mol F: C19H32O3 Inv Status: Custom Synthesis
Chemical Name: (3S,5R,6R,8R,9S,10R,13S,14S,17S)-10,13-Dimethylhexadecahydro-1H-cyclopenta[a]phenanthrene-3,6,17-triol
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Exemestane Impurity 21
CAT No: CL-EMTN-46 CAS No: 49644-04-4 Mol Wt: 308.5 Mol F: C19H32O3 Inv Status: Custom Synthesis
Chemical Name: (3S,5S,6S,8R,9S,10R,13S,14S,17S)-10,13-Dimethylhexadecahydro-1H-cyclopenta[a]phenanthrene-3,6,17-triol
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Exemestane Impurity 22
CAT No: CL-EMTN-47 CAS No: 49644-02-2 Mol Wt: 306.4 Mol F: C19H30O3 Inv Status: Custom Synthesis
Chemical Name: (5S,6S,8R,9S,10R,13S,14S,17S)-6,17-Dihydroxy-10,13-dimethylhexadecahydro-3H-cyclopenta[a]phenanthren-3-one
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Exemestane Impurity 23
CAT No: CL-EMTN-48 CAS No: 14895-71-7 Mol Wt: 306.4 Mol F: C19H30O3 Inv Status: Custom Synthesis
Chemical Name: (3S,5S,6S,8R,9S,10R,13S,14S)-3,6-Dihydroxy-10,13-dimethylhexadecahydro-17H-cyclopenta[a]phenanthren-17-one
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Exemestane Impurity 24
CAT No: CL-EMTN-49 CAS No: 26991-58-2 Mol Wt: 302.4 Mol F: C19H26O3 Inv Status: Custom Synthesis
Chemical Name: (5R,8R,9S,10R,13S,14S)-10,13-Dimethyldodecahydro-1H-cyclopenta[a]phenanthrene-3,6,17(2H)-trione
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Exemestane Impurity 26
CAT No: CL-EMTN-50 CAS No: 1361017-89-1 Mol Wt: 468.6 Mol F: C27H32O5S Inv Status: Custom Synthesis
Chemical Name: ((8R,9S,10R,13S,14S)-10,13-dimethyl-3,17-dioxo-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-6-yl)methyl 4-methylbenzenesulfonate

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