Compliance is critical due to the combustion nature of the product. You should verify that the factory provides MSDS (Material Safety Data Sheet) to identify chemical components. For the US market, ensure compliance with CPSC guidelines, and for the EU, check for REACH registration regarding fragrance allergens. Additionally, look for FSC (Forest Stewardship Council) certification to guarantee that the wood is sourced from sustainably managed forests, which is a growing requirement for high-end B2B buyers.