Arca Space advertised the use of hydrogen peroxide, at least for some of their launches a while ago: https://en.wikipedia.org/wiki/ARCA_Space_Corporation https:

Arca Space advertised the use of hydrogen peroxide, at least for some of their launches a while ago: https://en.wikipedia.org/wiki/ARCA_Space_Corporation https://en.wikipedia.org/wiki/ARCA_Space_Corporation