Letter from the CEO https://www.brenntag.com/corporate/documents/sustainability/brenntag-supplier-code-of-conduct_2015.pdf https://www.brenntag.com/corporate/documents/sustainability/brenntag-supplier-code-of-conduct_2015.pdf https://www.brenntag.com/corporate/documents/sustainability/brenntag-supplier-code-of-conduct_2015.pdf we invite selected suppliers to undergo a sustainability assessment or audit.