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ECAPS is a Swedish space company, established in 2000 by the Swedish Space Corporation (SSC) and Volvo Aero with the primary purpose of developing rocket propellants safer than hydrazine, but with the same application areas. The company was acquired in 2017 and is currently part of the Bradford group of space systems companies, which is itself part of the larger AIAC group of manufacturing companies

One of the developed propellants is HPGP, a name for a propellant blend consisting primarily of ammonium dinitramide, ammonia, methanol and water. Another name for the propellant is LMP-103S, which refers to the specific blend. Propellant is currently being produced in Karlskoga, Sweden with production of thruster systems primarily produced within Bradford facilities (which include ECAPS facilities) in Solna, Sweden and Heerle, Netherlands.

ECAPS HPGP systems have been used on the European PRISMA mission and is currently being used by Planet's (formerly Skybox Imaging & Google's Terra Bella) SkySat constellation. Fifteen spacecraft to date have been launched with HPGP systems. HPGP is also planned to be used on the Lunar Flashlight and ArgoMoon missions to the Moon, on Astroscale space debris removal spacecraft, and on the Astranis microGEO bus.