Description

(18α,19α,20β)-3β-Hydroxyursan-16-One CAS NO 42556-50-3 is a high-purity pentacyclic triterpenoid compound belonging to the ursane class. This specific stereoisomer is valued for its defined chemical structure, making it a critical reference standard and a key intermediate in advanced pharmaceutical and nutraceutical research. It is primarily sought by R&D and quality control laboratories in the pharmaceutical, biotechnology, and natural product extraction industries. The compound's consistent purity and structural integrity are essential for ensuring the accuracy of analytical methods and the efficacy of downstream formulations.

Application

• Pharmaceutical Reference Standard: Used for the identification, assay, and purity testing of ursane-type triterpenoids in drug development and quality control (QC) protocols.
• Active Pharmaceutical Ingredient (API) Intermediate: Serves as a key chiral building block in the synthetic pathways for novel therapeutic agents targeting inflammation and metabolic disorders.
• Nutraceutical and Cosmetic Research: Investigated for its potential bioactive properties in the development of high-value skincare and dietary supplement formulations.
• Academic and Industrial Research: Employed in biochemical studies to explore structure-activity relationships (SAR) and biological pathways of triterpenoids.
• Analytical Method Development: Acts as a critical calibration standard for HPLC, LC-MS, and NMR methods used in natural product analysis.

Basic Information

Product Name	(18α,19α,20β)-3β-Hydroxyursan-16-One
CAS No.	42556-50-3
Molecular Formula	C30H48O2
Molecular Weight	440.71 g/mol
Synonyms	3β-Hydroxyursan-16-one; Ursan-16-one, 3-hydroxy-, (3β,18α,19α,20β)-; 3β-Hydroxy-18α,19α,20β-ursan-16-one; 16-Oxoursan-3β-ol; Ursane-3β,16-dione (related); Triterpenoid Ursane Derivative; 3-Epi-α-Amyrinone (related structural analog)
EINECS	Contact for details

Quality Control

Every batch of (18α,19α,20β)-3β-Hydroxyursan-16-One is produced and controlled under a strict quality management system. Our products undergo rigorous identity, purity, and assay testing using advanced analytical techniques (HPLC, GC, NMR) to ensure compliance with research and development standards. A comprehensive Certificate of Analysis (COA) detailing all test results is provided with each shipment to guarantee traceability and batch-to-batch consistency for your critical applications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at a controlled room temperature (15-25°C). The product is light-sensitive and should be handled under appropriate conditions to maintain stability.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to reference spectrum
Identification (HPLC)	Retention time matches reference standard
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
Heavy Metals	≤ 10 ppm
Related Substances (HPLC)	Total impurities ≤ 2.0%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.