This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Nafion structure. Nafion polymeric sulfonic acid useful in fuel cells own Kebes at en other versions Kebes Original upload log page en Nafionstructure Upload date User Bytes Dimensions Comment UTC Kebes bytes no created this chemical structure image myself and hereby release it into the public domain Sulfonic acids