Hypergolic doesn't mean "bad stuff", "highly toxic" or "carcinogenic" though, it just means "ignites on its own" (it's usually though not necessarily a combination of a fuel and an oxidiser[0])

Then again, hypergolic components are generally extremely toxic or ridiculously corrosive or both.

[0] generally because e.g. Chlorine Trifluoride is such a strong oxidiser it's famously[1] hypergolic with stuff not usually considered "fuel" like cloth, people, water, sand or asbestos

[1] http://blogs.sciencemag.org/pipeline/archives/2008/02/26/san...