Essentially α- alanine -N, N- diacetic acid and / or α- alanine -N, containing one or more derivatives of N- diacetic acid, free-flowing at and storage stability of solid production process

A process is proposed for producing a free-flowing and storage-stable solid comprising essentially α-alanine-N,N-diacetic acid and/or one or more derivatives of α-alanine-N,N-diacetic acid proceeding from a powder of α-alanine-N,N-diacetic acid and/or one or more derivatives of α-alanine-N,N-diacetic acid by a. compacting the powder of α-alanine-N,N-diacetic acid on a roller press to obtain slugs, b. crushing the slugs and c. screening the crushed slugs, which comprises performing the compaction on the roller press with addition of polyethylene glycol with a melting point greater than 35° C.