Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

Determining a Kd-value for calcium oxide is not relevant, since this molecule reacts with water to release calcium ions and hydroxyl ions. Reliable Kd-values for calcium range from 5.3 L/kg to 49.1 L/kg and are added as supportive information. The Kd-concept is not relevant for hydroxyl ions, since the behaviour of these ions depends on the pH buffer capacity of the tested medium. Studies on the adsorption/ desorption of calcium carbonate are also not technically feasible or scientifically justified.