Key technical parameters include Assay purity (typically 98.0% - 102.0%), Calcium content (18.6% - 19.4%), and Loss on Drying (usually ≤12.0%). Physical properties like particle size (mesh size) and solubility are crucial; for instance, a finer powder is preferred for smooth toothpaste textures, while high solubility is required for liquid formulations. Buyers should also request a Heavy Metals analysis, ensuring Lead (Pb), Arsenic (As), and Mercury (Hg) levels are well within safety limits (e.g., Pb < 3ppm).