Overview
Robinin is a naturally occurring flavonoid glycoside primarily extracted from black locust (Robinia pseudoacacia) flowers. As a kaempferol derivative, it belongs to the flavonol subclass of polyphenols. The compound has gained attention in biochemical research due to its distinctive robinobioside sugar moiety and demonstrated bioactivity. In industrial contexts, robinin serves as a specialty chemical for pharmaceutical formulation and cosmetic applications. Its commercial production typically involves chromatographic separation from plant extracts, followed by crystallization. The compound's stability and solubility profile make it suitable for various delivery systems.
Physical and Chemical Properties
Robinin presents as a yellow crystalline solid with characteristic UV absorption maxima at 265nm and 345nm, typical for flavonol compounds. The glycosidic linkage at the 3-position of the kaempferol aglycone enhances its water solubility compared to non-glycosylated flavonoids. The compound demonstrates moderate thermal stability, with decomposition beginning at 200°C. Its redox potential contributes to antioxidant capacity, as measured by ORAC (Oxygen Radical Absorbance Capacity) assays. In solution, robinin exhibits pH-dependent stability, remaining intact in mildly acidic to neutral conditions but undergoing hydrolysis in strongly alkaline environments.
Main Applications
In pharmaceuticals, robinin is investigated as a potential active ingredient for anti-inflammatory formulations and metabolic disorder treatments. Preliminary studies suggest modulation of NF-κB signaling pathways. The cosmetic industry utilizes robinin in anti-aging serums and suncare products due to its UV absorption properties and collagen-protective effects. Nutraceutical applications include incorporation into functional food supplements targeting oxidative stress. Industrial uses extend to natural dye production, where robinin's chromophore properties yield stable yellow pigments. Recent research explores its potential as a biomarker for botanical authentication in honey and herbal products.
Safety and Storage
As a fine chemical, robinin requires careful handling to maintain stability and prevent contamination. The powder form may generate dust that can irritate respiratory passages, necessitating use in fume hoods with proper ventilation. Long-term storage recommendations include oxygen-free environments with desiccants to prevent oxidative degradation. Safety Data Sheets classify robinin as causing mild eye irritation (Category 2B). First aid measures recommend flushing with water for 15 minutes upon contact. For laboratory-scale quantities, amber glass vials with PTFE-lined caps provide optimal protection against light and moisture degradation.
B2B Procurement Guide
When sourcing robinin, buyers should prioritize suppliers providing comprehensive analytical documentation including HPLC chromatograms (typically C18 column, 254nm detection), mass spectrometry verification, and residual solvent analysis. Pharmaceutical-grade material requires additional USP/EP compliance testing. Minimum order quantities often range from 10g for research purposes to kilogram quantities for industrial applications. Lead times vary significantly depending on extraction and purification processes - typically 4-8 weeks for custom purifications. Contract manufacturing organizations (CMOs) specializing in plant-derived compounds may offer competitive pricing for larger volumes with purity specifications tailored to application requirements.
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