Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 926-771-1 | CAS number: -
Dissociation constant
Administrative data
Link to relevant study record(s)
Description of key information
Dissociation is defined as being the reversible splitting into two or more chemical species which may be ionic (OECD guideline 112). The dissolution process of MMVF note Q fibres is a non-reversible leaching of inorganic species into water. The inorganic ions are not able to recombine into the original non-dissociated glass state. The leached species are naturally occurring compounds in drinking water.
Key value for chemical safety assessment
Additional information
Dissociation is defined as reversible splitting into two or more ionic chemical species (OECD guideline 112). MMVF note Q fibres are inorganic mineral fibres which are slightly water soluble through the non-reversible leaching of inorganic species. The species dissolved in water are ionic. They are not able to combine back into the original non-dissociated glass state.
It is noted that Kdis (the dissolution constant) reported in this dossier in connection to the toxicological assessment of the MMVF note Q fibres is a parameter used to determine the ability of the fibres to break down (dissolve) into smaller fragments in the human body, which should be considered as separate data.
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.
