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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

Biodegradation testing in water, sediment and soil is not considered applicable for elemental calcium (Ca) for three reasons: (1) substance is inorganic (2) testing is not feasible because of Ca reactivity in water and (3) direct and indirect exposure of Ca to aquatic, sediment and soil compartment is unlikely.

  1. In accordance with REACH Annex VII Column 2 adaptation statement, ready biodegradability study does not need to be conducted if the substance is inorganic.

  2. Based on the known chemistry of alkaline earth metals, Ca metal reacts with water, evolving hydrogen gas. In powdered form the reaction with water is extremely rapid. In the Ca-water reaction calcium dihydroxide is formed. Therefore, testing of elemental Ca is not feasible. However, if elemental Ca reacts with water forming calcium dihydroxide (Ca(OH)2) this substance fully dissociates in water to calcium ions (Ca2+) and hydroxyl ions (OH-).

  3. In accordance with Annex XI.3 and Column 2 adaptation statements, biodegradation can be also considered irrelevant for elemental Ca based on the environmental exposure considerations. Elemental Ca is used in iron, steel and alloy manufacturing processes mostly in massive forms such as lumps, turnings and strips or granules of 2-7 mm. The exposure based considerations of Ca in these use applications indicate that there are no intended releases of Ca into water and soil compartments because Ca metal will immediately react under the extreme heat conditions of these processes to form CaO which may be emitted as a component of the fume or dust from the furnace or become part of the slag. In addition, the exposure and bioavailability information indicate that there is no need to consider biodegradation data on the relevant Ca compounds. See supporting exposure assessment information in CSR Chapter 9.