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: -
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
not readily biodegradable
Key value for chemical safety assessment
- Biodegradation in water:
- under test conditions no biodegradation observed
Additional information
Analogue sbstance 3 was tested for ready biodegradation following OECD 301E (BASF, 1982) showing no ready biodegradation properties. Since the acetate portion is readily biodegradable, the cationic part, the dimethylviolet-cation with a triarylmethane structure, has the responsibility for the non biodegradability of the substance. In the BASF study a DOC removal of 10 - 20% DOC in 28 days was observed. Triarylmethanes are known to be poorly biodegradable, in fact studies on the biodegradation of other triarylmethane dyes (Cha et al. 2001, Yatome et al. 1993) indicated that only minor parts of the C-backbone are susceptible to biodegradation. Based on the read across considerations, the same results apply to Basic Violet 1 Acetate and the substance can be considered as not ready biodegradable and consequently persistent.
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