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The hydrolysis of SIKA Hardener MH in different media (ultra-pure water, aprotic and protic organic solvents like acetonitrile and methanol) and the stability of SIKA Hardener MH's degradation product (Aldehyde M) in water and aqueous buffer solutions (OECD and ISO medium) at room temperature were investigated using LC/MS and LC/MS/MS, respectively. Measurements revealed a very fast hydrolysis of SIKA Hardener MH in water and water-based media (t1/2 < 0.6 minutes in water). The degradation products of the hydrolysis of SIKA Hardener MH are 2,2-dimethyl-3-(morpholin-4-yl)propanal (Aldehyde M) and hexanediamine.

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