Registration Dossier
Registration Dossier
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EC number: 270-185-2 | CAS number: 68412-38-4 This substance is identified in the Colour Index by Colour Index Constitution Number, C.I. 77899.
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
With high probability acutely not harmful to algae
Key value for chemical safety assessment
Additional information
Studies on the toxicity of C.I. Pigment Yellow 164 to algae are not available. Therefore data on the toxicity of the substance to algae refer to the structural analog C.I. Pigment Yellow 53. Two studies according to OECD 201 on the toxicity of C.I. Pigment Yellow 53toDesmodesmus subspicatusandScenedesmus subspicatusare considered. The results of a limit test performed by MOE (2001) using 1 mg/L test substance and a static exposure test accomplished by BASF AG (1999) indicate that the test substance has no toxic effects in the range of its water solubility (NOEC >1 mg/L and EC50 >100mg/L, respectively). A slight effect on the growth (based on biomass) was observed inDesmodesmus subspicatusat a threshold value below nominal 100 mg/l [EbC10 (72 h) = 64.1 mg/l], beeing probably due to a reduction of light intensity in the test vessels due to coloration or clouding in test water at high substance concentrations.
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