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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Physical & Chemical properties

Dissociation constant

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Administrative data

Link to relevant study record(s)

Description of key information

There are calculations available for this substance predicting pKa values
The calculation for the deprotonation of DMPPA_701-402-5 gives: pKa = 13.3 (25°C)
The calculation for the protonation of DMPPA_701-402-5 gives: pKa = -0.99 (25°C)

Key value for chemical safety assessment

pKa at 20°C:
13.3

Additional information

From this calculation it can be concluded that in an environmentally relevant pH range of 4 -9 the test substance remains neutral, i.e. does not dissociate by deprotonation and is not ionised by protonation. Calculation was done using advanced chemistry development (ACD/Labs) Software VII.02.