Sulfamic acid cleaning solution for 4,4'-methylene-bisorthochloroaniline (MOCA)

Laboratory tests have shown that an aqueous solution of 1.0 wt.% sulfamic acid-0.5 vol.% surfactant can be used for decontaminating MOCA-contaminated surfaces to less than the analytical detectable limits for MOCA, without any flammability hazards. Nuclear magnetic resonance spectra have shown that a different compound is formed when sulfamic acid is reacted with MOCA, as evidenced by the disappearance of the NH2 peak from the MOCA spectrum.