Hydrogen Peroxide (HTP) (H₂O₂) is a storable oxidizer / monopropellant propellant used as a oxidizer (or monopropellant). Storable but slowly decomposes; requires passivated containers. Typical ISP: 150–170 s (monopropellant), 250–300 s (bipropellant with kerosene) seconds.
High-test peroxide (HTP) is a concentrated form of hydrogen peroxide (85-98%) used as a monopropellant or oxidizer in rocket engines. When passed over a silver or platinum catalyst, it decomposes exothermically into steam and oxygen. HTP was used in early rocket programs including the V-2 turbopump drive, Mercury capsule attitude control, and the Black Arrow launch vehicle.
Used in the V-2 Walter turbine, Black Arrow, Mercury spacecraft, and early British rockets. Seeing renewed interest for green propulsion.
Storable, non-toxic exhaust, can serve as monopropellant, catalytic decomposition
Moderate Isp, slow decomposition in storage, material compatibility issues, can detonate
