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Density

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Reference
Endpoint:
relative density
Type of information:
experimental study
Adequacy of study:
weight of evidence
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Data taken from a published chemistry handbook
Qualifier:
according to guideline
Guideline:
other: not reported
Principles of method if other than guideline:
Not reported
GLP compliance:
no
Type of method:
other: not stated in handbook
Type:
relative density
Density:
1.041 g/cm³
Temp.:
17.5 °C
Remarks on result:
other: 5% solution
Key result
Type:
relative density
Density:
1.274 g/cm³
Temp.:
17.5 °C

The relative density at 17.5 ⁰C is reported to be:

1.0407 g/cm3 for a 5% solution

1.0834 g/cm3 for a 10% solution

1.1281 g/cm3 for a 15% solution

1.174 g/cm3 for a 20% solution

1.2235 g/cm3 for a 25% solution

1.2742 g/cm3 for a 30% solution

Conclusions:
The relative density at 17.5 ⁰C ranges from 1.0407 -1.2742 g/cm3 for solutions of 5 -30%
Executive summary:

The relative density at 17.5 ⁰C is reported to be:

1.0407 g/cm3 for a 5% solution

1.0834 g/cm3 for a 10% solution

1.1281 g/cm3 for a 15% solution

1.1740 g/cm3 for a 20% solution

1.2235 g/cm3 for a 25% solution

1.2742 g/cm3 for a 30% solution.

Description of key information

Published handbook data report the relative density at 17.5 ⁰C  to range from 1.0407 -1.2742 g/cm3 for solutions of 5 -30%

Key value for chemical safety assessment

Relative density at 20C:
1.274

Additional information

The relative density at 17.5 ⁰C is reported to be (Merck Index, 2001):

1.0407 g/cm3for a 5% solution

1.0834 g/cm3 for a 10% solution

1.1281 g/cm3 for a 15% solution

1.174 g/cm3 for a 20% solution

1.2235 g/cm3 for a 25% solution

1.2742 g/cm3 for a 30% solution.

The density of a 60.97% aqueous solution of hexafluorosilicic acid is reported to be 1.4634 at 25 degrees Celsius (Hollemann et al, 1995). Since the solutions above 30 -35% are not stable, the result of the 60.97% solution is considered to be not relevant for the assessment.