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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Bioaccumulation: aquatic / sediment

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Administrative data

Link to relevant study record(s)

Description of key information

The bioconcentration factor of  the two main hydrolysis products of 77PD,  1,4 -dimethylpentylamino-p-phenol and  1,4-Dimethylbutylamine; its BCF ranges from 1.7 - 109. 

Key value for chemical safety assessment

Additional information

Due to the rapid degradation of 77PD (half-life 3.6 hours) in aqueous media, a bioaccumulation potential is not expected. However bioconcentration factors for the primary hydrolysis products are available: BCF of 1,4 -dimethylpentylamine is <=17 (experimental, read-across from 1,3 -dimethylbutylamine) and BCF of

1,4 -dimethylpentylamino-p-phenol is 109 L/kg (calculated). The latter result is supported by information from the primary hydrolysis product of 6PPD and 7PPD which is 4 -hydroxydiphenylamine (BCF up to 49, experminental)