Registration Dossier
Registration Dossier
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EC number: 200-848-3 | CAS number: 75-20-7
Flammability
Administrative data
Link to relevant study record(s)
Description of key information
Dry calcium carbide is not highly flammable under the test conditions of test method EU A.10.
However, upon contact with water the test substance is instantly degraded to calcium hydroxide and the extremely flammable gas acetylene.
Key value for chemical safety assessment
- Flammability:
- substances and mixtures which in contact with water emit flammable gases
Additional information
In a test according to method EU A.10 it could be demonstrated that dry calcium carbide is not highly flammable.
However, the intrinsic physico-chemical hazard profile is determined by the release of the extremely flammable gas acetylene from calcium carbide upon contact with water. As no standard test data (e.g. according to method EU A.12) are available, a search for publically available information has been conducted to identify relevant information for calcium carbide regarding the endpoint flammability. This information as well as data from an internal test report of the lead registrant regarding the release of the highly flammable gas acetylene from calcium carbide upon contact with water were subject to expert review.
It could be demonstrated that the formation rate of acetylene gas from calcium carbide upon contact with water at ambient temperatures was > 10 L/(kg min). Thus, calcium carbide can be classified as Water-react. 1.
Justification for classification or non-classification
In a test according to method EU A.10 it could be demonstrated that dry calcium carbide is not highly flammable.
Peer reviewed handbook data show that the formation rate of acetylene gas from calcium carbide upon contact with water at ambient temperatures was > 10 L/(kg min). Thus, calcium carbide can be classified as Water-react. 1.Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
