Carotene[2]
Overview
Carotene is a class of terpenoid pigments predominantly found in plants, algae, and photosynthetic bacteria. It is best known for its role as a precursor to vitamin A, essential for human vision and immune function. The most common forms are β-carotene and α-carotene, which differ in molecular structure but share similar biological activity. Industrially, carotene is extracted from carrots, palm oil, or produced synthetically. Its vibrant color and nutritional benefits make it valuable in food, cosmetics, and healthcare sectors. Over time, carotene degrades when exposed to light, heat, or oxygen, leading to reduced potency and potential expiration.
Physical and Chemical Properties
Carotene is a hydrocarbon with a conjugated double-bond system, responsible for its light absorption and color. It is highly lipophilic, dissolving readily in fats and organic solvents but insoluble in water. The compound is sensitive to oxidation, which can lead to bleaching and loss of activity. Under standard conditions, carotene forms orange-red crystals or oily solutions. Its melting point ranges around 180°C, though it often decomposes before boiling. Degradation products include apocarotenals and volatile compounds, which may alter sensory properties in food applications.
Main Applications
In the food industry, carotene serves as a natural colorant (E160a) in products like margarine, beverages, and snacks. It is also used in dietary supplements to address vitamin A deficiency, particularly in regions with limited access to animal-derived retinol. Cosmetics leverage carotene for its antioxidant properties and skin-conditioning effects in creams and lotions. Additionally, it is added to animal feed to enhance egg yolk pigmentation and poultry health. Expired carotene may still find use in non-critical applications like low-grade feed or compost additives, though efficacy is diminished.
Safety and Storage
Carotene is non-toxic at dietary levels but may cause benign carotenodermia (skin yellowing) if consumed excessively. Industrial handlers should avoid prolonged inhalation of powder forms, which may irritate respiratory tracts. To prolong shelf life, store carotene in airtight containers under nitrogen or argon, ideally at temperatures below 25°C. Expired or degraded carotene should be disposed of following local hazardous waste regulations, though it poses minimal environmental risk.
B2B Procurement Guide
Buyers should prioritize suppliers providing certificates of analysis (CoA) detailing purity, heavy metal content, and microbiological safety. For bulk purchases, consider stability guarantees and packaging options (e.g., nitrogen-flushed bags). Expired carotene may be available at discounted rates but requires testing for residual activity. Negotiate contracts with clauses for batch replacement in case of premature degradation. Spot purchases should focus on recently manufactured stock with ≥12 months remaining shelf life.
Related Manufacturers
- 主营：回收油漆、回收染料、回收树脂、收购过期胡罗卜素、回收机油、回收橡胶、回收助剂
- 主营：莪术二酮、人参皂苷rc、自制对照品、胡罗卜素、淫羊藿次苷
- 主营：化学试剂、科研试剂、实验室试剂、分析试剂、有机试剂、生物试剂