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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

Phototransformation in air :

The atmospheric oxidation half-life of 2-Naphthalenol, 1-[[4-(phenylazo)phenyl]azo]-, ar',ar''-Me derivs. was estimated using the level III multimedia model. It was estimated that the substance is not persistent in air medium as the half life period of 2-Naphthalenol, 1-[[4-(phenylazo)phenyl]azo]-, ar',ar''-Me derivs. in air is only 0.79 days. This indicates that 2-Naphthalenol, 1-[[4-(phenylazo)phenyl]azo]-, ar',ar''-Me derivs. is easily phototransformed in air.

Hydrolysis :

The Hydrolysis rate constant of 2-Naphthalenol, 1-[[4-(phenylazo)phenyl]azo]-, ar',ar''-Me derivs is estimated to be 0.0000000000200865 cm3/molecule-sec. at half life of 6.39Hrs.The estimated half life of the substance indicates that the substance is moderately hydrolysable.