Overview
Carophyll Red is a synthetic azo dye belonging to the carotenoid family, primarily used as a coloring agent in various industries. Its vibrant red hue makes it particularly valuable in animal feed to enhance the color of egg yolks, poultry skin, and fish flesh. The pigment is approved for use in many countries, though regulatory restrictions may apply in certain regions. As a cost-effective alternative to natural pigments like astaxanthin, Carophyll Red offers consistent coloration and stability under typical processing conditions. Its synthetic nature allows for precise control over color intensity, making it a preferred choice for industrial applications where uniformity is critical.
Physical and Chemical Properties
Carophyll Red appears as a fine red powder with good water solubility, facilitating its incorporation into aqueous systems. The compound demonstrates remarkable heat stability, maintaining its color integrity at temperatures encountered during feed pelleting or food processing. However, prolonged exposure to UV light may cause gradual fading. The pigment's coloration is pH-dependent, exhibiting optimal red hues in neutral to slightly acidic conditions. In alkaline environments, the color may shift toward brownish tones. Its molecular structure includes sulfonate groups that enhance water solubility and ionic character, making it compatible with most feed and food matrices.
Main Applications
In animal nutrition, Carophyll Red is extensively used in poultry feed to achieve desirable yolk coloration, typically at inclusion rates of 10-50 mg/kg feed. The aquaculture industry employs it for coloring salmonid flesh, while pet food manufacturers use it to enhance visual appeal. The pigment's approval for food use varies by jurisdiction, with common applications including confectionery, beverages, and dairy products. The cosmetic industry utilizes Carophyll Red in makeup formulations, particularly in lipsticks and blushes, where its intense color payoff and stability are advantageous. Industrial applications extend to paper coloring and specialty coatings, though these represent smaller market segments compared to feed and food uses.
Safety and Storage
Carophyll Red is generally recognized as safe when used within approved limits, though some individuals may exhibit allergic reactions. Regulatory limits vary significantly between regions - the EU permits 500 mg/kg in certain foods while the US FDA has more restrictive guidelines. Always consult local regulations before formulation. Proper storage involves keeping the product in its original packaging at temperatures below 25°C, with relative humidity under 65%. The pigment should be protected from direct sunlight and contamination. Bulk containers should be tightly sealed after each use to prevent moisture absorption and oxidation, which can affect color stability.
B2B Procurement Guide
When sourcing Carophyll Red, prioritize suppliers who provide comprehensive certificates of analysis including purity, heavy metal content, and microbiological status. Pharmaceutical-grade suppliers often offer superior consistency compared to industrial chemical vendors. Consider minimum order quantities (typically 25kg drums) and lead times, as import/export restrictions may apply for synthetic colorants. For feed applications, verify the product meets relevant standards such as EU Regulation 1831/2003 or FDA 21 CFR 73.30. Food-grade purchases require additional documentation including allergen statements and GMO status. Request samples for lab testing before large purchases to confirm color performance in your specific application matrix.
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