Overview
Centaurea cyanus powder is derived from the petals of the cornflower, a plant native to Europe and widely cultivated for its ornamental and medicinal value. The powder retains the flower's natural blue pigments, primarily anthocyanins, which are water-soluble flavonoids. Unlike synthetic dyes, it offers a sustainable and non-toxic coloring option, aligning with clean-label trends in food and cosmetics. Historically, cornflower extracts were used in traditional European herbal remedies for eye health and inflammation. Today, B2B applications focus on its dual role as a colorant and bioactive ingredient, particularly in organic and natural product formulations.
Physical and Chemical Properties
The powder exhibits a vibrant blue-purple color due to its high anthocyanin content, which is pH-sensitive (red in acidic conditions, blue in neutral). Its fine particle size ensures easy dispersion in aqueous solutions, making it suitable for liquid formulations like shampoos or beverages. The extract also contains polyphenols and polysaccharides, contributing to its mild antioxidant and moisturizing properties. Stability can vary with exposure to heat, light, and pH changes. For industrial use, encapsulation or blending with stabilizers (e.g., ascorbic acid) is recommended to prolong shelf life. Unlike synthetic dyes, it does not require heavy metal-based mordants for color fixation.
Main Applications
In cosmetics, Centaurea cyanus powder is valued for its soothing properties and natural hue, appearing in eye creams, lipsticks, and hair dyes. Its anti-inflammatory effects make it a candidate for sensitive-skin formulations. The food industry employs it as a natural alternative to FD&C Blue No. 1 in confectionery, beverages, and dairy products, though its lighter shade may require higher dosages. Pharmaceutical and nutraceutical sectors utilize it in capsule coatings or herbal supplements, capitalizing on its anthocyanin content for potential vascular health benefits. Industrial buyers should note that regulatory approval (e.g., EU E163, US FDA GRAS) varies by application and region.
Safety and Storage
The powder is non-toxic and biodegradable, but allergens like pollen residues may persist despite processing. Patch testing is advised for topical products. Occupational exposure limits are not established, though dust inhalation should be minimized during handling. Storage requires protection from humidity and UV light to prevent degradation. Bulk purchases should specify nitrogen-flushed packaging to preserve color intensity. Shelf life typically ranges from 12–24 months under optimal conditions, with color fade as the primary indicator of spoilage.
B2B Procurement Guide
When sourcing Centaurea cyanus powder, prioritize suppliers with organic or wild-harvesting certifications (e.g., USDA Organic, ECOCERT) to ensure pesticide-free quality. Request lab reports for anthocyanin concentration (HPLC tested) and microbial counts (total plate count <10,000 CFU/g). For cost efficiency, consider blended formulations with other natural colorants (e.g., spirulina) to achieve deeper shades. MOQs often start at 5–10 kg for small-scale manufacturers, with discounts available at 50+ kg orders. Sample testing for compatibility with your base formulations (e.g., pH stability) is strongly recommended before large-scale procurement.
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