The use of elastane is increasing and the global market for elastane increased with 13% during 2022, while the total fiber market increased with 3.7%. Elastane is a common minority fiber in polyester, nylon and polycotton, typically found at fractions from 2-15%. Monomer recycling of polyester and nylon is typically done using solvolytical methods; glycolysis, hydrolysis or alcoholysis. During solvolytic degradation the urethane and urea bonds of elastane are attacked, liberating a polyol and an aromatic residue, commonly 4,4'-methylenedianiline (MDA) which is a suspect carcinogen found on the candidate list and therefore restricted in the EU. We will present data focused on the prevalence of MDA in the reaction products from glycolysis, hydrolysis and methanolysis of PET/elastane blends under different processing conditions. We report MDA concentration in the different reaction products; monomer, solvent and solid phases, to extend the knowledge on safe chemical recycling processes and ways to mitigate the risks with side-reactions of elastane.