Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Administrative data

Hazard for aquatic organisms

Hazard for air

Hazard for terrestrial organisms

Hazard for predators

Additional information

Conclusion on classification

1-Phenyl-3-methyl-4-(p-dodecylphenylazo)-5-pyrazolone is highly insoluble and there is no expected acute toxicity at levels up to the water solubility. In addition, the substance is not readily biodegradable based on biodegradation estimates. Furthermore, the log Kow of this substance is ≥ 4. Taken together, this information indicates that 1-Phenyl-3-methyl-4-(p-dodecylphenylazo)-5-pyrazolone is classified as Aquatic Chronic 4.