It’s a gigantic improvement over hydrazine rocket fuel used by rockets like SpaceX’s.
SpaceX doesn’t use hydrazine or any other hypergolic fuels in its rockets (the one exception is the emergency engines on the Crew Dragon capsule used for humans, but these engines have never been used in crew flights).
Older rockets in China (like the Long March 2) or Russia (like the Proton) still use those toxic hypergolic fuels for the main boosters.