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Description of key information

Based on the available genotoxicity and carcinogenicity data on the constituents of the reaction mass of calcium carbonate, calcium dihydroxide and silicon dioxide, the substance is not considered to be carcinogenic.

Key value for chemical safety assessment

Justification for classification or non-classification

Instead of conducting new in vivo tests, available data on the constituents of the reaction mass of calcium carbonate, calcium dihydroxide and silicon dioxide were used to evaluate the carcinogenic potential of the substance. The available data indicate that most of the constituents of the substance are not suspected to be associated with cancer. The only constituent for which an association with cancer has been stated (IARC 1997) is silicon dioxide. IMA-Europe (IMA-Europe Position Paper, February 2010) recently stated that the current scientific knowledge on respirable crystalline silica rather justifies its classification as STOT RE cat. 1.

Therefore, based on the available genotoxicity and carcinogenicity data on the constituents of the reaction mass of calcium carbonate, calcium dihydroxide and silicon dioxide, a classification for carcinogenicity was not considered justified.

 

Information sources:

IARC (1997) Silica, some silicates, coal dust and para –aramid fibrils., International Agency for Research on Cancer, pp. 1-242 (IARC Monographs on the Evaluation of Carcinogenic Risks to Humans, Vol. 68).

IMA-Europe Position Paper (February 2010) on the classification and labelling of respirable crystalline silica (RCS) http://www.ima-reach-hub.eu/index.php?option=com_docman&task=doc_download&gid=141&Itemid=26

European chemical Substances Information System http://ecb.jrc.ec.europa.eu/esis/

International Programme on Chemical Safety, Concise international chemical assessment document No.24, Crystalline silica, Quartz, 09-21-10, http://www.inchem.org/documents/cicads/cicads/cicad24.htm

International chemical Safety Cards, National Instutute for occupational Safety and Health http://www.cdc.gov/niosh/ipcsneng/neng0808.html

International chemical Safety Cards, National Instutute for occupational Safety and Health http://www.cdc.gov/niosh/ipcsneng/neng0408.html

International chemical Safety Cards, National Instutute for occupational Safety and Health 

http://www.cdc.gov/niosh/ipcsneng/neng0409.html

 

Additional information