Botanical Source: Marigold Appearance: Fine Orange Powder (The color would become fuscous when purity increases) Specification: Lutein 10%-90% (Test Method: HPLC) Molecular formula: C40H56O2 Molecular weight: 568.85 Packing: according to demand Shelf life: 2 years Use: Widely used in food, health care products, medicine, cosmetics, feed etc