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API Impurities

Betamethasone Impurity 20

Reference StandardIn stock

Buy Betamethasone Impurity 20 (CAS 4735-65-3) from Zemixal. Request a quote with price, lead time and documents. Catalogue no. ZX-004447.

Pack sizes
Betamethasone Impurity 20 chemical structure
CAS number4735-65-3
FormulaC24H31BrO6
Molar mass495.4 g/mol
Physical formSolid
HS code38229090
Purity89.3%
InChIKeyPLVGDQKUTWULDB-QZIXMDIESA-N
IUPAC name[2-[(8S,9R,10S,11S,13S,14S,16S,17R)-9-bromo-11,17-dihydroxy-10,13,16-trimethyl-3-oxo-6,7,8,11,12,14,15,16-octahydrocyclopenta[a]phenanthren-17-yl]-2-oxoethyl] acetate

About Betamethasone Impurity 20

Betamethasone Impurity 20 belongs to the Betamethasone reference-standard family in the Zemixal catalogue. For your records (Reference Standard), the material is defined by CAS 4735-65-3, formula C24H31BrO6 and molar mass 495.4 g/mol. It is handled as a solid.

Where it is used

  • Analytical method development
  • Method validation (AMV)
  • QC release testing
  • ANDA / DMF filings

Available as 10 mg, 25 mg, 50 mg, 100 mg and 250 mg. Larger or split packs can be arranged. Each lot travels with a certificate of analysis with characterisation data. Add it to your quote list and our team replies with price, lead time and shipping options within one business day.

Reference standards for Betamethasone

See every impurity, metabolite and related compound we list for this API.

Betamethasone standards

Typical uses

  • Analytical method development
  • Method validation (AMV)
  • QC release testing
  • ANDA / DMF filings

Applications

Pharmaceutical Manufacturing and QCResearch Labs and Universities

Specifications and identifiers

Specifications of Betamethasone Impurity 20
Product nameBetamethasone Impurity 20
Catalogue numberZX-004447
CAS number4735-65-3
IUPAC name[2-[(8S,9R,10S,11S,13S,14S,16S,17R)-9-bromo-11,17-dihydroxy-10,13,16-trimethyl-3-oxo-6,7,8,11,12,14,15,16-octahydrocyclopenta[a]phenanthren-17-yl]-2-oxoethyl] acetate
Molecular formulaC24H31BrO6
Molar mass495.4 g/mol
Exact mass494.1304
GradeReference Standard
Purity / assay89.3%
Physical formSolid
XLogP33.2
H-bond donors / acceptors2 / 6
Topological polar surface area101 Ų
HS code38229090
InChIKeyPLVGDQKUTWULDB-QZIXMDIESA-N
SMILESC[C@H]1C[C@H]2[C@@H]3CCC4=CC(=O)C=C[C@@]4([C@]3([C@H](C[C@@]2([C@]1(C(=O)COC(=O)C)O)C)O)Br)C
PubChem CID97640119
Synonyms21-(Acetyloxy)-9-bromo-11b,17-dihydroxy-16b-methyl-pregna-1,4-diene-3,20-dione, (11β,16β)-21-(Acetyloxy)-9-bromo-11,17-dihydroxy-16-methylpregna-1,4-diene-3,20-dione, 21-(Acetyloxy)-9-Bromo-11beta,17-Dihydroxy-16beta-Methyl-Pregna-1,4-Diene-3,20-Dione, 9-Bromo-11beta,17,21-trihydroxy-16beta-methyl-pregna-1,4-diene-3,20-dione 21-Acetate, Betamethasone Impurity 39, (11, A,16, A)-21-(Acetyloxy)-9-bromo-11,17-dihydroxy-16-methylpregna-1,4-diene-3,20-dione

Lot values are stated on the batch certificate of analysis. Ask for a typical COA with your quotation.

Safety and GHS hazards

No GHS classification is on file for this item. Handle it as an unknown laboratory chemical and request the SDS with your quotation.

Pack sizes

Pack sizes of Betamethasone Impurity 20
10 mgQuoted on request
25 mgQuoted on request
50 mgQuoted on request
100 mgQuoted on request
250 mgQuoted on request
500 mgQuoted on request
1 gQuoted on request

Need a different size? Bulk drums and custom packing are quoted on request through the quote form on this page.

Questions about Betamethasone Impurity 20

Which CAS number identifies Betamethasone Impurity 20?
Betamethasone Impurity 20 is registered under CAS 4735-65-3. You may also see it listed as 21-(Acetyloxy)-9-bromo-11b,17-dihydroxy-16b-methyl-pregna-1,4-diene-3,20-dione, (11β,16β)-21-(Acetyloxy)-9-bromo-11,17-dihydroxy-16-methylpregna-1,4-diene-3,20-dione, 21-(Acetyloxy)-9-Bromo-11beta,17-Dihydroxy-16beta-Methyl-Pregna-1,4-Diene-3,20-Dione. Our catalogue number for this item is ZX-004447.
What are the formula and molar mass of Betamethasone Impurity 20?
For Betamethasone Impurity 20, its formula is C24H31BrO6 and its molar mass is 495.4 g/mol. InChIKey PLVGDQKUTWULDB-QZIXMDIESA-N lets you match it in any structure database.
How is Betamethasone Impurity 20 used in pharmaceutical QC?
Betamethasone Impurity 20 is a characterised reference material linked to Betamethasone. Laboratories use it to identify and quantify this impurity during method development and validation, stability work, batch release testing and regulatory submissions.
What grade and pack sizes are available for Betamethasone Impurity 20?
This listing is Reference Standard grade with 89.3% purity. Standard packs are 10 mg, 25 mg, 50 mg, 100 mg, 250 mg, 500 mg. Larger quantities and custom packing can be quoted on request.
Which documents come with Betamethasone Impurity 20?
Each lot ships with a batch certificate of analysis and a 16-section GHS safety data sheet. A typical COA or specification sheet can be shared with the quotation before you order.
Can Zemixal ship Betamethasone Impurity 20 to my country?
Yes. Betamethasone Impurity 20 ships worldwide by express courier, air cargo or sea freight, quoted on the Incoterm you prefer, with full export documents.

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