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The substance used for estimation of log Kow is the amide derivative of Basic Brown 1 acetate. The amide derivative is less polar and can represent a conservative case for Basic Brown 1 acetate (the prediction for its water solubility is in the same range of Basic Brown 1 acetate (0.008 mg/l vs 0.1 mg/l)). The calculated log Kow is 3.41 (< 4.5) while the BCF resulted equal to 10 (<2000). Therefore, based on the log Kow and BCF values Basic brown 1 Acetate is not considered bioaccumulative.