White to yellow‑white or light yellow powder. Some suppliers list “light yellow” or “yellowish‑white.Varies depending on formulation; non‑liposomal ferric pyrophosphate often ~24‑26% elemental iron. In liposomal form, the “iron content” will be less when expressed per unit powder because of the added lipids/carriersFerric pyrophosphate is insoluble in water in pure form; soluble in acids or with appropriate delivery systems. But in liposomal form, the powder is designed to have good dispersibility in aqueous media (i.e. when mixed into liquids) because the liposome carriers helpSlight iron‑smell; minimal off‑taste, especially when liposomally encapsulated which helps mask metallic taste.
High purity products (medicine or supplement grade) will have low heavy metal content (lead, arsenic, mercury etc.), and low microbial counts.