I have a couple lines in my file that read
\edef\Delta{\noexpand\ensuremath{\mathchar\the\Delta}}
\newcommand{\HCN}{HCN2J\Delta AB}
How bad an idea would it be to change the second one to
\newcommand{\HCN}{\texorpdfstring{{HCN2J\Delta AB}{HCN2JdAB}}
if I'm using that macro in both captions and body?