The usually applied classification of carrageenans assumes that only the disaccharide unit characteristic of one type of carrageenan is present in the polymer. However, some carrageenans contain different disaccharide repeating units within one polymer chain and are also known as hybrid carrageenans or kappa-2 carrageenans . Hybrid/kappa-2 carrageenans gained relevance for selected applications and several types have been described and structurally characterized in the literature, such as κ/ι- , ν/ι- and µ/κ-hybrid carrageenans .