I also stumbled about this, although not from the US, I would be interested in this. Which case did you read up on?

It is actually one of the most used as plastizizers and I assume that it is nearly every product of every hardware manufacturer. Not sure what makes Razer mention it on their product page.
https://en.wikipedia.org/wiki/Bis%282-ethylhexyl%29_phthalate
http://www.cancer.ca/en/prevention-and-screening/reduce-cancer-risk/make-informed-decisions/know-your-environment/phthalates/?region=on
http://www.greenfacts.org/en/dehp-dietylhexyl-phthalate/