Calla 500 is a highly concentrated and versatile alkaline water based cleaner that meets all requirements of specification Mil-C-25769G. It is primarily intended for removal of exhaust stains and general aircraft cleaning. When tests are conducted in accordance with Mil-C- 25769G, Calla 500 is safe on aluminum alloys, magnesium alloys and cadmium plated steel; does not cause crazing or cracking of acrylic base plastic under stress and there is no attack on the plastic. Calla 500 is formulated with biodegradable detergents, contains no harmful concentrations of phenols, chromates or chlorinated solvents and has proven to be a safe, efficient and economical aircraft cleaning material. Calla 500 is also recommended for use on all aviation related ground service equipment.