Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Physical & Chemical properties

Dissociation constant

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Administrative data

dissociation constant
Data waiving:
study technically not feasible
Justification for data waiving:
Justification for type of information:
In accordance with section 1, Annex XI of Regulation (EC) 1907/2006 (REACH), this study does not need to be conducted. This property is applicable only for ionisable organic substances. Lime (chemical) hydraulic is an inorganic material mainly consisting of Ca(OH)2, which reacts with water to give a solution of calcium and hydroxide ions. Therefore, when dissolved in water, the substance is completely ionised into Ca2+ and OH- ions. Mineral impurities may also be dissolved to a minor degree. The concept of dissociable functional groups is therefore not applicable. Therefore, the determination of a dissociation constant is not considered to be required (ECHA Guidance on information requirements and chemical safety assessment Chapter R.7a: Endpoint specific guidance, section R.7.1.17).

Data source

Materials and methods

Results and discussion

Applicant's summary and conclusion