Compliance is critical due to the chemical nature of the product. Suppliers must provide MSDS (Material Safety Data Sheet) and IFRA (International Fragrance Association) certification to ensure the ingredients are safe for inhalation. For the US market, ensure compliance with California Proposition 65, and for the EU, verify REACH (Registration, Evaluation, Authorisation and Restriction of Chemicals) registration. If the product includes a glass bottle or electronic diffuser, leak-proof testing reports and CE/RoHS certifications are necessary.