Registration Dossier
Registration Dossier
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EC number: 926-771-1 | CAS number: -
Water solubility
Administrative data
Link to relevant study record(s)
Description of key information
Although some material can be extracted from the fibre (measured as 4.53 mg/L with respect to silicon only), the fibres appear to be unchanged. The mass of extracted silicon per surface area of the microfibre has been calculated to be 0.623 mg/m2.
As the fibres remain essentially intact, the test item was considered to be insoluble at pH7.
Key value for chemical safety assessment
Additional information
A fibre is a water insoluble particle with an aspect ratio (length/diameter>3) and diameter smaller than 100 um. FMMVF fibres fulfil these granulometric criteria and evaluated as highly insoluble in water.
The substance under consideration in this dossier does not strictly speaking dissolve in water. Any gravimetric estimation of weight loss in water is complicated by fibres being retained at the meniscus by surface tension effect and adherence to any glass surface, so that recovery rarely exceeds 90%.
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.
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