methyl (3aR,5aR,5bS,7aS,11aS,13aR,13bR,Z)-3-(hydroxyimino)-5a,5b,10,10,13b-pentamethyl-1,2,3,3a,4,5,5a,5b,6,7,8,9,10,11,11a,13,13a,13b-octadecahydro-7aH-cyclopenta[a]chrysene-7a-carboxylate CAS 557766-14-0

Purity 97%+In StockPharmaceutical Standards
CAS No.557766-14-0
Molecular FormulaC28H43NO3
Molecular Weight441.65 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

methyl (3aR,5aR,5bS,7aS,11aS,13aR,13bR,Z)-3-(hydroxyimino)-5a,5b,10,10,13b-pentamethyl-1,2,3,3a,4,5,5a,5b,6,7,8,9,10,11,11a,13,13a,13b-octadecahydro-7aH-cyclopenta[a]chrysene-7a-carboxylate CAS 557766-14-0 chemical structure

Description

Owing to a steroid core, an amide group, a hydroxyl group, an ether linkage, methyl (3aR,5aR,5bS,7aS,11aS,13aR,13bR,Z)-3-(hydroxyimino)-5a,5b,10,10,13b-pentamethyl-1,2,3,3a,4,5,5a,5b,6,7,8,9,10,11,11a,13,13a,13b-octadecahydro-7aH-cyclopenta[a]chrysene-7a-carboxylate is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 441.65 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).

methyl (3aR,5aR,5bS,7aS,11aS,13aR,13bR,Z)-3-(hydroxyimino)-5a,5b,10,10,13b-pentamethyl-1,2,3,3a,4,5,5a,5b,6,7,8,9,10,11,11a,13,13a,13b-octadecahydro-7aH-cyclopenta[a]chrysene-7a-carboxylate (CAS 557766-14-0) is a high-purity analytical reference standard with the molecular formula C28H43NO3 and a molecular weight of 441.65 g/mol.

Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.

As a certified reference material (CRM), methyl (3aR,5aR,5bS,7aS,11aS,13aR,13bR,Z)-3-(hydroxyimino)-5a,5b,10,10,13b-pentamethyl-1,2,3,3a,4,5,5a,5b,6,7,8,9,10,11,11a,13,13a,13b-octadecahydro-7aH-cyclopenta[a]chrysene-7a-carboxylate meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.

Physical & Chemical Properties

Molecular FormulaC28H43NO3
Molecular Weight441.65 g/mol
AppearancePale yellow to yellow crystalline powder
Purity97%+
StorageStore at room temperature, protect from light, keep sealed and dry
Solubility (reference)Soluble in chloroform, dichloromethane, ethyl acetate, DMSO
StabilityMay oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light
Degree of Unsaturation (DBE)8.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1984
Nitrogen Atoms1

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