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Diss Factsheets

Physical & Chemical properties

Water solubility

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Administrative data

Link to relevant study record(s)

Referenceopen allclose all

Endpoint:
water solubility
Type of information:
other: handbook
Adequacy of study:
weight of evidence
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data
Remarks:
Handbook data are considered from a trusted source. Data have been taken from many sources, including both compilations and the primary literature - where conflicts were found, the value deemed most reliable was chosen. The reference was peer-reviewed. In addition, the reference sources are indicated although not leading to sufficient information on the material & method used.
Guideline:
other: not mentioned
Principles of method if other than guideline:
Method followed unknown; data from handbook.
GLP compliance:
not specified
Water solubility:
24.2 other: wt%
Temp.:
20 °C
Remarks on result:
other: no data on pH in the handbook
Water solubility:
27.7 other: wt%
Temp.:
25 °C
Remarks on result:
other: no data on pH in the handbook
Conclusions:
According to the CRC Handbook of Chemistry and Physics (80th ed.) potassium nitrate is very soluble in water (> 10000 mg/L).
Endpoint:
water solubility
Type of information:
other: Safety Card
Adequacy of study:
weight of evidence
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
documentation insufficient for assessment
Remarks:
From International Chemical Safety Cards. There is no indication that the physico-chemical data has been ‘peer reviewed’. The reference source is not indicated leading to insufficient information on the material & method used.
Guideline:
other: not mentioned
Principles of method if other than guideline:
Method followed unknown; data from safety card
GLP compliance:
not specified
Water solubility:
357 g/L
Conc. based on:
test mat.
Temp.:
25 °C
Remarks on result:
other: no pH indicated

35.7 g/100 mL at 25°C

Conclusions:
According to the ICSC nr: 0184 (Potassium nitrate) the water solubility of potassium nitrate is 357 g/L at 25°C
Endpoint:
water solubility
Type of information:
other: handbook
Adequacy of study:
weight of evidence
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data
Remarks:
Handbook data are considered from a trusted source. Data have been taken from many sources, including both compilations and the primary literature - where conflicts were found, the value deemed most reliable was chosen. The reference was peer-reviewed. In addition, the reference sources are indicated although not leading to sufficient information on the material & method used.
Guideline:
other: not mentioned
Principles of method if other than guideline:
Method followed unknown; data from handbook.
GLP compliance:
not specified
Key result
Water solubility:
> 10 000 mg/L
Conc. based on:
test mat.
pH:
ca. 7
Remarks on result:
other: No details on temperature provided

One gram dissolves in 2.8 mL water. Dissolves in water with a lowering of the temperature. pH ~ 7.

Conclusions:
According to the Merck Index (12th ed.) potassium nitrate is very soluble in water (> 10000 mg/L).

Description of key information

From two handbooks and ICSC no. 0184 it was concluded that potassium nitrate is very soluble in water.

Key value for chemical safety assessment

Water solubility:
100 g/L
at the temperature of:
25 °C

Additional information

Handbooks:

-CRC Handbook of Chemistry and Physics (80th ed.)

-The Merck Index (12th ed.)