Q. Do I use footnotes/endnotes for ACS (American Chemical Society) Style?
No, while the in-text citations are superscript numbers like footnotes/endnotes in Chicago Style they are not the same thing.
ACS assigns in-text superscript numbers to the sources based upon the author’s last name or order of use in your paper. These numbers can then be reused if you cite the source again, which is proper ACS format. Footnotes and endnotes do not allow you to reuse the same number, they assign a new footnote/endnote number when you cite a source again.
Also footnotes will produce a space on the same page to put information about the source. ACS does not want any information beyond the superscript number on that page. All information about the source can be found in the Reference List.
See the FAQ “How do I create in-text citations for ACS (American Chemical Society) Style?” for information on how to create these in-text citations.
If you need further help, contact a librarian.