Overview
Astragalus Polysaccharide Reference Standard is a purified extract from Astragalus membranaceus roots, standardized for use in pharmaceutical quality control and research applications. As a reference material, it serves as a benchmark for identifying and quantifying polysaccharides in herbal products and formulations. The standard is particularly valued in Traditional Chinese Medicine (TCM) research and modern immunology studies due to its bioactive properties. Manufacturers typically provide detailed chromatographic profiles and biological activity data to ensure reproducibility across different laboratories and production batches.
Physical and Chemical Properties
This polysaccharide standard exhibits typical carbohydrate characteristics, showing strong water solubility but poor solubility in organic solvents like ethanol or acetone. The material is hygroscopic and requires careful handling to prevent moisture absorption that could affect its analytical performance. Structural analysis reveals a complex mixture of branched polysaccharides containing glucose, rhamnose, arabinose, and galactose units. The exact composition varies slightly depending on the Astragalus source and extraction methods, which is why reference standards must be carefully characterized for specific research or QC applications.
Main Applications
In pharmaceutical quality control, the reference standard is essential for HPLC and other chromatographic methods to verify Astragalus content in herbal preparations. It ensures batch-to-b consistency in TCM products claiming immune-modulating effects. Research laboratories use it to study immunopharmacological mechanisms, particularly macrophage activation and cytokine modulation. The standard also serves in method development for polysaccharide analysis and in stability studies of herbal formulations containing Astragalus extracts.
Safety and Storage
While generally considered non-toxic, the powder should be handled with standard laboratory precautions to avoid inhalation or eye contact. Proper personal protective equipment including dust masks and gloves is recommended during weighing procedures. For long-term stability, the material should be stored refrigerated (2-8°C) in its original sealed container with desiccant. Aliquots for frequent use may be kept at room temperature for short periods in airtight vials, but extended exposure to heat or humidity should be avoided as it may lead to degradation.
B2B Procurement Guide
When sourcing Astragalus Polysaccharide Reference Standard, prioritize suppliers that provide comprehensive analytical documentation including HPLC chromatograms, carbohydrate composition analysis, and biological activity data. Certified reference material (CRM) status from recognized organizations adds value but increases cost. For regulatory applications, verify the standard's suitability for your specific testing methodology. Some suppliers offer custom characterization services to align the reference material with particular pharmacopoeia methods. Minimum order quantities typically range from 100mg to 1g, with bulk discounts available for research institutions requiring larger quantities.
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