Registration Dossier
Registration Dossier
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Reaction mass of N-(4-(bis(4-(methylamino)phenyl)methylene)cyclohexa-2,5-dienylidene)-N-methylmethanaminium acetate and [4-[[4-(dimethylamino)phenyl][4-(methylamino)phenyl]methylene]cyclohexa-2,5-dien-1-ylidene]dimethylammonium acetate and [4-[bis[4-(dimethylamino)phenyl]methylene]-2,5-cyclohexadien-1-ylidene]dimethylammonium acetate
EC number: 944-191-7 | CAS number: -
Water solubility
Administrative data
Link to relevant study record(s)
Description of key information
water solubility > 74.28 g/l at pH=4.37 < 400g/l
Key value for chemical safety assessment
Additional information
Basic Violet 1 Acetate is produced and put on the market in acetic aqueous solution and cannot be isolated in a solid powder form. The solubility of Basic Violet 1 Acetate is increased by the presence of an high quantity of free acetic acid that by solvent evaporation would crystalize in a solid form.
The analysed sample contains ca. 40% of the dye dissolved in the acetic aqueous solution and therefore the solubility of the dye in the commercial sample is ca. 400 g/l.
The analogue substance 1 was tested for water solubility following OECD 105 and resulted equal to 74.28 g/l at pH=4.37.
The analogue substance 2 was tested for water solubility following OECD 105 and resulted equal to 374 g/l at 20°C.
Based on these considerations (and the read across document) the solubility of Basic Violet 1 Acetate is expected to be > 74.28 g/l and < 400 g/l (commercial product), where the upper limit is also justified by the value determined on analogue substance 2.
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