Registration Dossier
Registration Dossier
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Reaction mass ofDisodium [1-{[2-(hydroxy-kO)-3,5-dinitrophenyl]diazenyl-kN1}naphthalen-2-olato(2-)-kO][3-(hydroxy-kO)-4-{[2-(hydroxy-kO)naphthalen-1-yl]diazenyl-kN1}-7-nitronaphthalene-1-sulfonato(3-)]chromate(2-) andDisodium [1-{[2-(hydroxy-kO)-3,5-dinitrophenyl]diazenyl-kN2}naphthalen-2-olato(2-)-kO][3-(hydroxy-kO)-4-{[2-(hydroxy-kO)naphthalen-1-yl]diazenyl-kN1}-7-nitronaphthalene-1-sulfonato(3-)]chromate(2-)
EC number: 944-038-4 | CAS number: -
Endpoint summary
Administrative data
Description of key information
Short-term toxicity tests are available for all three tropic levels (fish, invertebrates and aquatic plants) which indicate that Acid Black 107 may pose long-term hazard to aquatic species.
Additional information
Short-term toxicity tests are available for all three tropic levels (fish, invertebrates and aquatic plants). Based on the three fish studies available the LC50 value for the test substance ranges from 0.66 to 2.3 mg/L. In a study conducted according to OECD Guideline 202, the 48 h EC50 & EC100 value of the test substance FAT 20037 to Daphnia magna was determined to be >10 mg/L. In the control and in all test concentrations, no immobilization of the daphnia was observed after 48 hours. The EC0 is at least 10.0 mg/L, but might even be higher than this concentration. The EC50 and EC100 values are clearly higher than 10.0 mg/L. Therefore, the EC50 value could not be calculated. Due to intrinsic properties of the substance, the test to determine the acute toxicity to aquatic algae and cyanobacteria cannot be performed. The dark coloration of the test medium and reduced light intensity in the medium modifying the conditions of test. Hence, to determine the toxicity to the aquatic plant Lemna minor, a semi-static growth inhibition test was performed. In a GLP-compliant OECD Guideline 221 study, Lemna gibba (Duckweed) exposed to the test item FAT 20037 recorded: the EC50 values for the test substance based on average specific growth rate were, EC50 (frond number): >100 mg/L, EC50 (dry weight): 92 mg/L, while the EC50 values based on yield were, EC50 (frond number): 10 mg/L, EC50 (dry weight): 5 mg/L. In a key study conducted to evaluate the toxicity of the test substance to bacteria, the IC50 (BST) was determined to be greater than 300 mg/L.
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