Betamethasone Acetate EP Impurity B

CAS No 1177-87-3

IUPAC 9-Fluoro-11β,17-dihydroxy-16α-methyl-3,20-dioxopregna-1,4-dien-21-yl acetate

Catalogue No. PACE-B08003

Molecular Formula C₂₄H₃₁FO₆

Molecular Weight 434.5 g/mol

Synonyms Dexamethasone Acetate

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Betamethasone Acetate IHRS

CAS No 987-24-6

IUPAC 9-Fluoro-11β,17-dihydroxy-16β-methyl-3,20-dioxopregna-1,4-diene-21-yl acetate

Catalogue No. PACE-B08001

Molecular Formula C₂₄H₃₁FO₆

Molecular Weight 434.8 g/mol

Synonyms Betamethasone 21-Acetate

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Betamethasone Acetate EP Impurity A

CAS No 378-44-9

IUPAC 9-Fluoro-11β,17,21-trihydroxy-16β-methylpregna-1,4-diene-3,20-dione

Catalogue No. PACE-B08002

Molecular Formula C₂₂H₂₉FO₅

Molecular Weight 392.5 g/mol

Synonyms Betamethasone

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Betamethasone Acetate EP Impurity C

CAS No 330157-05-6

IUPAC 9-Fluoro-17-hydroxy-16β-methyl-3,20-dioxopregna-1,4-diene-11β,21-diyl diacetate

Catalogue No. PACE-B08004

Molecular Formula C₂₆H₃₃FO₇ 

Molecular Weight 476.5 g/mol

Synonyms  Betamethasone Acetate USP Related Compound C , Betamethasone 11,21-Diacetate

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Betamethasone Acetate EP Impurity D

CAS No 912-38-9

IUPAC 9,11β-Epoxy-17-hydroxy-16β-methyl-3,20-dioxo-9β-pregna-1,4-dien-21-yl acetate

Catalogue No. PACE-B08005

Molecular Formula C₂₄H₃₀O₆

Molecular Weight 414.5 g/mol

Synonyms Betamethasone Acetate USP Related Compound D

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