Registration Dossier
Registration Dossier
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EC number: 200-300-3 | CAS number: 56-93-9
Particle size distribution (Granulometry)
Administrative data
Link to relevant study record(s)
Description of key information
Testing of the aqueous solution of BTMAC is technically impossible.
Testing of solid BTMAC by laser diffraction is technically impossible, because solid BTMAc is very hygroscopic.
Additional information
Over 95 % of the BTMAC is produced and marketed as 60% aqueous solution. Particle size distribution testing of that material is thus technically impossible.
About 10 t/a are produced and marketed as solid BTMAC. Solid BTMAC is very hygroscopic and the wet crystals stick together in smaller and bigger lumps when exposed to the air. These lumps cannot be analysed by laser diffraction due to the moisture in the substances. Moisture droplets are formed in a dispersing solvent, which interfere with the measurement of the particle size of the crystals. Sieving is not an alternative since the substance sticks to the sieves.
Based on this it is concluded that it is technically not possible to determine the particle size distribution of these substances in the commercial form.
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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