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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

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Physical & Chemical properties

Partition coefficient

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Administrative data

Link to relevant study record(s)

Description of key information

log Kow range: 5.3-6.1 (readacross) 

Key value for chemical safety assessment

Additional information

Estimation of partition coefficient for perfluorinated chemicals by QSAR approaches is of limited utility. Partition coefficient of perfluorotripropyl amines (PTBA) was addressed by readacross using category members perfluoroheptanes (PFHp, CAS# 1064698-16-3) and perfluorotributyl amines (PTBA, CAS# 1064698-37-8). Water solubility is intimately related to partition coefficient. Since PFHp and PTBA have water solubilities bracketing PTPA, they provide the best estimate of the range of partition coefficient for PTPA. Please see IUCLID section 13 for the category justification and a matrix of physicochemical data for members of the Perfluorinated Organic Chemicals C5-C18 category.