When sourcing White Soft Paraffin for medical or cosmetic use, it must strictly adhere to international pharmacopoeia standards such as BP (British Pharmacopoeia), USP (United States Pharmacopeia), or EP (European Pharmacopoeia). Ensure the supplier provides a Certificate of Analysis (COA) for every batch, confirming the melting point (typically 38°C to 60°C), specific gravity, and the absence of polycyclic aromatic hydrocarbons. For pharmaceutical applications, verify that the manufacturer holds a GMP (Good Manufacturing Practice) certification.