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EC number: 269-047-4 | CAS number: 68186-85-6 This substance is identified in the Colour Index by Colour Index Constitution Number, C.I. 77377.
The product C.I. Pigment Green 50 (without and including its impurity Ni titanate) is with high probability acutely not harmful to invertebrates.
The results of a semi-static exposure test as conducted by MOE (2001) and a static exposure as performed by BASF AG (1999) on the toxicity of C.I. Pigment Yellow 53 to Daphnia magna indicate that the test substance has no toxic effects in the range of its water solubility. Thus, with a high probability P.I Pigment Green 50 itself (i.e. without the impurity Ni) is not chronically harmful to aquatic organisms.
Furthermore, the acute reference values of 120 and 68 µg Ni/L for pH 6.0 and 8.0 are well above of the Ni concentration after two different loading rats of P.I Pigment Green 50 (including the impurity Ni titanate): The concentrations were 3 and 40 µg Ni/L at pH 5.5 and < 1 and 17 µg Ni/L at pH 8.5 at loadings of 1 and 100 mg P.I Pigment Green 50/L, respectively.
Therefore, with a high probability the pigment is acutely not harmful to aquatic organisms.
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