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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Currently viewing:

Administrative data

Endpoint:
dissociation constant
Type of information:
other: handbook
Adequacy of study:
supporting study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data

Data source

Reference
Reference Type:
review article or handbook
Title:
Dissociation constants of inorganic substances, 8-44
Author:
Lide, D.R. (ed.)
Year:
1999
Bibliographic source:
CRC Handbooko of Chemistry and Physics, 80th ed., 1999-2000, New York: CRC Press

Materials and methods

Test guideline
Guideline:
other: not mentioned in the handbook
Principles of method if other than guideline:
Method followed unknown.
GLP compliance:
not specified

Test material

Constituent 1
Chemical structure
Reference substance name:
Potassium nitrate
EC Number:
231-818-8
EC Name:
Potassium nitrate
Cas Number:
7757-79-1
Molecular formula:
HNO3.K
IUPAC Name:
potassium nitrate
Test material form:
solid: crystalline
Details on test material:
Name of test material: potassium nitrate (KNO3)
Physical appearance: colourless crystalline solid or a white crystalline or granular powder

Results and discussion

Dissociating properties:
yes
Dissociation constant
No.:
#1
pKa:
3.25
Temp.:
25 °C
Remarks on result:
other: Nitrous acid, HNO2

Applicant's summary and conclusion