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Physical & Chemical properties

Dissociation constant

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Reference
Endpoint:
dissociation constant
Type of information:
experimental study
Adequacy of study:
key study
Study period:
17 May 2010
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study without detailed documentation
Qualifier:
according to guideline
Guideline:
OECD Guideline 112 (Dissociation Constants in Water)
GLP compliance:
no
Dissociating properties:
yes
pKa:
<= 2
Temp.:
23 °C

The dissociation constant was estimated on the free non-neutralised sulfuric monoester. The degree of dissociation at relevant pH values (5 -9) is equal or larger than 99.9%.

Description of key information

The dissociation constant is ≤ 2.0 at 23 °C.

Key value for chemical safety assessment

pKa at 20°C:
2

Additional information

The value is taken from a study report.

The dissociation constant was estimated on the free non-neutralised sulfuric monoester. The degree of dissociation at relevant pH values (5 -9) is equal or larger than 99.9%.