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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

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Endpoint:
dissociation constant
Type of information:
not specified
Adequacy of study:
weight of evidence
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
other: Only secondary literature
Qualifier:
no guideline followed
Principles of method if other than guideline:
The testing methodology is not reported
GLP compliance:
not specified
Dissociating properties:
yes
pKa:
0.78
Temp.:
20 °C
Conclusions:
The disssociation constant is reported to be 0.78 at 20 °C
Endpoint:
dissociation constant
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Guideline study reported by an authoritative secondary source
Qualifier:
according to guideline
Guideline:
OECD Guideline 112 (Dissociation Constants in Water)
Deviations:
not specified
GLP compliance:
not specified
Dissociating properties:
yes
No.:
#1
pKa:
1.03
Temp.:
20 °C
Remarks on result:
other: average estimated value
Conclusions:
The estimated dissociation constant of diphenylamine was reported to be 1.03

Description of key information

The estimated dissociation constant of diphenylamine was reported to be 1.03

Key value for chemical safety assessment

pKa at 20°C:
1.03

Additional information