Due to the endangered status of certain sandalwood species, compliance with CITES (Convention on International Trade in Endangered Species) is mandatory for legal export/import. Furthermore, ensure the supplier provides an MSDS (Material Safety Data Sheet) for transport safety, a COA (Certificate of Analysis) for batch quality, and ISO 3515 standards compliance. For cosmetic or pharmaceutical use, look for IFRA (International Fragrance Association) conformity and GMP (Good Manufacturing Practice) certification.