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

Halobetasol
CAT No: CL-HOBO-01 CAS No: 98651-66-2 Mol Wt: 428.9 Mol F: C22H27ClF2O4 Inv Status: Custom Synthesis
Chemical Name: 21-Chloro-6?,9-difluoro-11?,17-dihydroxy-16?-methylpregna-1,4-diene-3,20-dione
Halobetasol Propionate
CAT No: CL-HOBO-02 CAS No: 66852-54-8 Mol Wt: 485 Mol F: C25H31ClF2O5 Inv Status: Custom Synthesis
Chemical Name: Ulobetasol propionate
Halobetasol Dipropionate
CAT No: CL-HOBO-03 CAS No: 886204-51-9 Mol Wt: 541 Mol F: C28H35ClF2O6 Inv Status: Custom Synthesis
Chemical Name: (6S,8S,9R,10S,11S,13S,14S,16S,17R)-17-(2-Chloroacetyl)-6,9-difluoro-10,13,16-trimethyl-3-oxo-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthrene-11,17-diyl dipropionate
Halobetasol Propionate USB RC B
CAT No: CL-HOBO-04 CAS No: 79861-38-4 Mol Wt: 508.5 Mol F: C27H34F2O7 Inv Status: Custom Synthesis
Chemical Name: (6S,9R,10S,11S,13S,14S,16S,17R)-17-(2-acetoxyacetyl)-6,9-difluoro-11-hydroxy-10,13,16-trimethyl-3-oxo-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-17-yl propionate
Halobetasol Propionate USB RC C
CAT No: CL-HOBO-05 CAS No: 181527-42-4 Mol Wt: 485 Mol F: C25H31ClF2O5 Inv Status: Custom Synthesis
Chemical Name: (6S,8S,9R,10S,13S,14S,16S,17R)-17-(2-chloroacetyl)-6,9-difluoro-17-hydroxy-10,13,16-trimethyl-3-oxo-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-11-yl propionate
Halobetasol Propionate USB RC D
CAT No: CL-HOBO-06 CAS No: 66852-61-7 Mol Wt: 501.4 Mol F: C25H31Cl2FO5 Inv Status: Custom Synthesis
Chemical Name: (6S,8S,9R,10S,11S,13S,14S,16S,17R)-9-chloro-17-(2-chloroacetyl)-6-fluoro-11-hydroxy-10,13,16-trimethyl-3-oxo-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-17-yl propionate
Halobetasol Propionate USP Related Compound E
CAT No: CL-HOBO-07 CAS No: NA Mol Wt: 501.4 Mol F: C25H31Cl2FO5 Inv Status: Custom Synthesis
Chemical Name: (6S,8S,10S,11S,13S,14S,16S,17R)-6-chloro-17-(2-chloroacetyl)-9-fluoro-11-hydroxy-10,13,16-trimethyl-3-oxo-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-17-yl propionate
Halobetasol Propionate Impurity 1
CAT No: CL-HOBO-08 CAS No: 924726-89-6 Mol Wt: 466.5 Mol F: C25H32F2O6 Inv Status: Custom Synthesis
Chemical Name: (6S,8S,9R,10S,11S,13S,14S,16S,17R)-6,9-difluoro-11-hydroxy-17-(2-hydroxyacetyl)-10,13,16-trimethyl-3-oxo-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-17-yl propionate
Halobetasol Propionate Impurity 2
CAT No: CL-HOBO-09 CAS No: 541502-98-1 Mol Wt: 466.5 Mol F: C25H32F2O6 Inv Status: Custom Synthesis
Chemical Name: 2-((6S,8S,9R,10S,11S,13S,14S,16S,17R)-6,9-difluoro-11,17-dihydroxy-10,13,16-trimethyl-3-oxo-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl propionate
Halobetasol Propionate Impurity 3
CAT No: CL-HOBO-10 CAS No: NA Mol Wt: 410.9 Mol F: C22H25ClF2O3 Inv Status: Custom Synthesis
Chemical Name: (6S,8S,9R,10S,11S,13S,14S)-17-(2-Chloroacetyl)-6,9-difluoro-11-hydroxy-10,13,16-trimethyl-6,7,8,9,10,11,12,13,14,15-decahydro-3H-cyclopenta[a]phenanthren-3-one
Halobetasol Propionate Impurity 4
CAT No: CL-HOBO-11 CAS No: 84509-92-2 Mol Wt: 544.6 Mol F: C26H34F2O8S Inv Status: Custom Synthesis
Chemical Name: (6S,8S,9R,10S,11S,13S,14S,16S,17R)-6,9-difluoro-11-hydroxy-10,13,16-trimethyl-17-(2-((methylsulfonyl)oxy)acetyl)-3-oxo-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-17-yl propionate
Halobetasol Propionate Impurity 5
CAT No: CL-HOBO-12 CAS No: 912360-04-4 Mol Wt: 467 Mol F: C25H29ClF2O4 Inv Status: Custom Synthesis
Chemical Name: (6S,8S,9R,10S,11S,13S,14S,16S,17R)-4'-chloro-5'-ethyl-6,9-difluoro-11-hydroxy-10,13,16-trimethyl-7,8,9,10,11,12,13,14,15,16-decahydro-3'H-spiro[cyclopenta[a]phenanthrene-17,2'-furan]-3,3'(6H)-dione
Halobetasol Propionate Impurity 6
CAT No: CL-HOBO-13 CAS No: NA Mol Wt: 494.6 Mol F: C27H36F2O6 Inv Status: Custom Synthesis
Chemical Name: (6S,9R,11S,16S,17R)-2'-Ethoxy-2'-ethyl-6,9-difluoro-11-hydroxy-10,13,16-trimethyl-7,8,9,10,11,12,13,14,15,16-decahydrospiro[cyclopenta[a]phenanthrene-17,4'-[1,3]dioxane]-3,5'(6H)-dione
Halobetasol Propionate Impurity 7
CAT No: CL-HOBO-14 CAS No: NA Mol Wt: 485 Mol F: C25H31ClF2O5 Inv Status: Custom Synthesis
Chemical Name: (6R,9R,11S,16S,17R)-17-(2-Chloroacetyl)-6,9-difluoro-11-hydroxy-10,13,16-trimethyl-3-oxo-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-17-yl propionate
Halobetasol Impurity 8
CAT No: CL-HOBO-15 CAS No: NA Mol Wt: 561.1 Mol F: C26H34ClFO8S Inv Status: Custom Synthesis
Chemical Name: (6S,9R,10S,11S,13S,16S,17R)-6-Chloro-9-fluoro-11-hydroxy-10,13,16-trimethyl-17-(2-((methylsulfonyl)oxy)acetyl)-3-oxo-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-17-yl propionate
Halobetasol Impurity 9
CAT No: CL-HOBO-16 CAS No: NA Mol Wt: 561.1 Mol F: C26H34ClFO8S Inv Status: Custom Synthesis
Chemical Name: (6S,9R,10S,11S,13S,16S,17R)-9-Chloro-6-fluoro-11-hydroxy-10,13,16-trimethyl-17-(2-((methylsulfonyl)oxy)acetyl)-3-oxo-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-17-yl propionate
Halobetasol Impurity 10
CAT No: CL-HOBO-17 CAS No: NA Mol Wt: 485 Mol F: C25H31ClF2O5 Inv Status: Custom Synthesis
Chemical Name: (8S,9R,10S,11S,13S,14S,16S,17R)-17-(2-chloroacetyl)-4,9-difluoro-11-hydroxy-10,13,16-trimethyl-3-oxo-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-17-yl propionate
Halobetasol 21-Mesylate Diflorasone
CAT No: CL-HOBO-18 CAS No: NA Mol Wt: 488.5 Mol F: C23H30F2O7S Inv Status: Custom Synthesis
Chemical Name: 2-((6S,9R,10S,11S,13S,16S,17R)-6,9-Difluoro-11,17-dihydroxy-10,13,16-trimethyl-3-oxo-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl methanesulfonate
Halobetasol Impurity 11
CAT No: CL-HOBO-19 CAS No: NA Mol Wt: 465 Mol F: C25H33ClO6 Inv Status: Custom Synthesis
Chemical Name: 9-Chloro-7',11-dihydroxy-10,13,16-trimethyl-7,8,9,10,11,12,13,14,15,16-decahydrospiro[cyclopenta[a]phenanthrene-17,2'-[1,5]dioxocane]-3,3'(6H)-dione
Halobetasol-17-Propionate D5
CAT No: CL-HOBO-20 CAS No: NA Mol Wt: 490 Mol F: C25H26D5ClF2O5 Inv Status: Custom Synthesis
Chemical Name: (6S,8S,9R,10S,11S,13S,14S,16S,17R)-17-(2-Chloroacetyl)-6,9-difluoro-11-hydroxy-10,13,16-trimethyl-3-oxo-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-17-yl propanoate-d5
6-Chloro Halobetasol Propionate
CAT No: CL-HOBO-21 CAS No: NA Mol Wt: 501.4 Mol F: C25H31Cl2FO5 Inv Status: Custom Synthesis
Chemical Name: (6S,8S,9R,10S,11S,13S,14S,16S,17R)-17-(2-chloroacetyl)-6,9-difluoro-11-hydroxy-10,13,16-trimethyl-3-oxo-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-17-yl propionate
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