Overview
Betulin reference standard is a purified triterpenoid compound extracted from the outer bark of birch trees (Betula spp.). As a reference material, it meets strict quality criteria for use in pharmaceutical quality control, analytical method validation, and biomedical research. The compound's unique pentacyclic structure makes it valuable for standardization in herbal medicine and drug development workflows. In B2B contexts, betulin reference standards are typically supplied with comprehensive documentation including certificates of analysis (CoA), chromatograms, and stability data. These materials enable laboratories to ensure the identity, potency, and consistency of betulin-containing products or research samples.
Physical and Chemical Properties
Betulin crystallizes as a white powder with characteristic melting behavior between 256-258°C. Its molecular structure contains hydroxyl groups at positions 3 and 28, contributing to moderate polarity. The compound demonstrates good stability when stored properly but may degrade under prolonged exposure to heat, light, or oxidizing agents. Solubility profiles show betulin dissolves readily in organic solvents like ethanol (50 mg/mL) and dimethyl sulfoxide (DMSO), while being practically insoluble in water (<0.1 mg/mL). This property influences its formulation in research applications. Spectroscopic characteristics include distinct IR absorption bands at 3400 cm⁻¹ (OH stretch) and 1640 cm⁻¹ (C=C stretch), useful for identification.
Main Applications
The primary use of betulin reference standard lies in analytical chemistry, where it serves as a quantitative and qualitative benchmark for HPLC, LC-MS, and TLC methods. Pharmaceutical companies employ it to standardize betulin content in herbal extracts and validate manufacturing processes for birch-derived therapeutics. In research settings, the compound facilitates studies on betulin's pharmacological activities, including its documented anti-inflammatory, antiviral, and anticancer properties. Recent investigations explore its potential as a precursor for synthetic derivatives with enhanced bioavailability. Additional applications include use as a marker compound in botanical authentication and as a starting material for semisynthetic drug development.
Safety and Storage
While betulin is generally considered low-risk, proper handling procedures should be followed to maintain material integrity and personnel safety. Powdered forms may cause mild irritation upon contact with eyes or respiratory membranes, necessitating use of basic PPE including gloves and dust masks during weighing operations. Long-term storage requires protection from moisture (relative humidity <60%) and temperature fluctuations. Ideal conditions involve amber glass vials with PTFE-lined caps at 2-8°C. Under these parameters, the reference standard typically maintains stability for 2-3 years. Users should periodically verify reference materials against fresh calibration curves, especially when used for quantitative applications.
B2B Procurement Guide
When sourcing betulin reference standards, prioritize suppliers with ISO 17034 accreditation or equivalent certification for reference material production. Key procurement considerations include batch-specific purity documentation (preferably ≥98% by HPLC), residual solvent analysis, and confirmation of spectroscopic identity (NMR, IR data). Bulk purchasing (100g+) may reduce unit costs by approximately 30-40%, though stability testing becomes more critical for large inventories. Leading manufacturers often provide custom purification services for specialized research needs. For regulated applications, ensure suppliers can furnish full traceability documentation including sourcing information for the raw birch bark material.
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