As a common excipient and food ingredient, compliance is non-negotiable. For global trade, ensure the supplier meets USP/NF, EP, or JP pharmacopeia standards if used in medicine. Food-grade shipments must have HACCP, ISO 22000, or FSSC 22000 certifications. Additionally, because it is a dairy derivative, Halal and Kosher certifications are often required for international market access. Always request a Certificate of Analysis (COA) for every batch to verify purity levels (typically ≥99%), moisture content (4.5%–5.5% for monohydrate), and microbiological limits (e.g., absence of Salmonella and E. coli).