Cosun Biobased Products is part of Royal Cosun

Carboxyline CMI

Carboxy Methyl Inulin (CMI) is a threshold scale inhibitor for carbonate and sulfate scaling with excellent calcium tolerance, high water solubility and low viscosity. It is an alternative for traditional fossil and phosphorus based chemicals.

CMI offers a unique combination of antiscaling, sequestration and dispersing properties, therefore it can be considered a multifunctional molecule.

Scale inhibition
CMI performs well as a threshold scale inhibitor for various types of scaling due to its three main functionalities: complexing of hard water ions, crystal growth inhibition and dispersancy. The presence of CMI has a clear effect on the amount, size and morphology of the scale crystals being formed.

CaCO3 crystals grown without an inhibitor      CaCO3 crystals grown in the presence of CMI (10x more magnified)

Environmental profile
CMI is inherently biodegradable. Test results include >20% biodegradation in 24 hours in the OECS 302A test (SCAS) and >60% anaerobic biodegradation in 28 days in the ISO 11734 test. The inherent biodegradability gives the product sufficient microbiological stability and reduces the requirement for preservation of the formulation.
Very low aquatic toxicity has been observed in chronic tests on Daphnia, Fish and Algae. Moreover, CMI is phosphorus and nitrogen free.

CMI is a chemical derivative produced by carboxy-methylation of inulin. Inulin is a plant reserve poly-saccharide extracted from chicory roots and is a renewable raw material.