Calla Solve 120 is a water dilutable D-limonene based solvent emulsion cleaner designed for heavy duty cleaning of aerospace equipment including aircraft, ground equipment and AGE engines. Calla Solve 120 is listed as a qualified product in Mil-C-87937 C Ty I (USAF) and is authorized for use by General Aircraft per T.O. 1-1-691 and T.O. 1 C-135 (K) A-3-4 for aircraft cleaning. The QPL reference is SFTT95-002. Calla Solve 120 is infinitely water dilutable while maintaining a stable emulsion. The formula contains hi-purity D-limonene, emulsifiers, stabilizers, surfactants and a selection of corrosion inhibiting additives designed specifically for aircraft substrates. Citra Safe M is a product from Inland Technologies.