Overview
Sulfonic Acid-Cyanidin is a chemically modified derivative of cyanidin, a natural anthocyanin pigment found in fruits and vegetables. The addition of sulfonic acid groups enhances its water solubility and stability, making it suitable for industrial applications. This compound is primarily synthesized for use in food coloring, pharmaceuticals, and research due to its vivid color and bioactive properties. Unlike natural anthocyanins, which are pH-sensitive and degrade easily, sulfonated variants exhibit improved resistance to heat and light. This modification broadens its utility in products requiring long shelf lives or specific color retention, such as beverages, confectionery, and nutraceuticals.
Physical and Chemical Properties
Sulfonic Acid-Cyanidin appears as a dark red to purple powder, soluble in water and polar solvents like ethanol. Its molecular structure includes a flavylium cation core with sulfonic acid substitutions, which contribute to its hydrophilic nature. The compound is stable under acidic conditions but may undergo reversible color changes at neutral or alkaline pH. Key properties include high molar extinction coefficients, making it effective for low-concentration applications, and resistance to oxidative degradation. Analytical methods such as HPLC and UV-Vis spectroscopy are typically used to assess purity and concentration.
Main Applications
The primary use of Sulfonic Acid-Cyanidin is as a natural food colorant (E163a derivative) in products like juices, jams, and dairy alternatives. Its non-toxicity and vibrant hue make it preferable to synthetic dyes. In pharmaceuticals, it serves as an active ingredient in antioxidant and anti-inflammatory formulations, leveraging anthocyanins' bioactive benefits. Research laboratories employ this compound to study flavonoid metabolism, cellular uptake, and free-radical scavenging. Its water solubility also facilitates in vitro assays where organic solvent compatibility is a concern.
Safety and Storage
While Sulfonic Acid-Cyanidin is generally recognized as safe (GRAS) for food use, handling should follow standard laboratory protocols to avoid inhalation or skin contact. Prolonged exposure to high concentrations may cause mild irritation. Storage recommendations include airtight containers in cool (4–25°C), dark environments to prevent photodegradation. Bulk quantities should be labeled with hazard symbols for professional use only. Disposal must comply with local regulations for organic compounds, avoiding release into waterways.
B2B Procurement Guide
When procuring Sulfonic Acid-Cyanidin, prioritize suppliers with ISO or GMP certifications to ensure quality consistency. Request certificates of analysis (CoA) detailing purity (≥95% by HPLC), heavy metal content, and microbial limits. Batch-to-batch variability can affect performance, so sample testing is advisable. Pricing depends on volume and purity; negotiate contracts for bulk purchases (e.g., >1 kg) to reduce costs. Logistics should guarantee temperature-controlled transport to maintain stability. For research-grade material, opt for small, sealed units to minimize degradation after opening.
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