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Density

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Reference
Endpoint:
density, other
Remarks:
density
Type of information:
experimental study
Adequacy of study:
key study
Study period:
from 2008-06-03 to 2008-07-02
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 109 (Density of Liquids and Solids)
Version / remarks:
with petroleum as displacement liquid
Deviations:
no
GLP compliance:
yes
Type of method:
pycnometer method
Remarks:
with petroleum as displacement liquid
Type:
density
Density:
2.35 g/cm³
Temp.:
20 °C

The density of the displacement liquid was determined at 20 °C using an oscillating densitometer:

1st determination: 0.7939 g/cm³

2nd determination: 0.7939 g/cm³

Density determination of the test item:

 

1st determination

2nd determination

A

mass of pycnometer empty [corrected for air]

38.7574

37.4298

B

mass of pycnometer with test item [corrected for air]

42.6970

41.7175

C

mass of pycnometer with test item and displacement liquid

61.1598

 

59.8571

D

mass of displacement liquid calculated for the total pycnometer volume

19.7935

19.5847

E

mass of test item (B - A)

3.9396

4.2877

F

mass of displacement liquid (C - B)

18.4628

18.1396

G

mass of displacement liquid calculated for the volume taken by the test item (D-F)

1.3307

1.4451

H

density of the test item

(E/G*density of displacement liquid)

2.3504 g/cm³

2.3555 g/cm³

I

density of the test item (mean)

2.353 g/cm³

Volume of 1st pycnometer: 24.932 cm³; volume of 2nd pycnometer: 24.669 cm³. Masses are listed in grams.

Conclusions:
The density of Potassium sulfite was determined to be 2.353 g/cm³ at 20 °C.
Executive summary:

For determination of the density of Potassium sulfite, the pycnometer method with petroleum as displacement liquid was carried out in accordance with the OECD-Guideline for the testing of chemicals (1995), 109 "Density of Liquids and Solids".

The density of Potassium sulfite was determined to be 2.353 g/cm³ at 20 °C.

Description of key information

The density of potassium sulfite is 2.353 g/cm³ at 20 °C, the relative density 2.353 (based on the density of water at 3.98 °C).

Key value for chemical safety assessment

Relative density at 20C:
2.353

Additional information

For determination of the density of Potassium sulfite, the pycnometer method with petroleum as displacement liquid was carried out in accordance with the OECD-Guideline for the testing of chemicals (1995), 109 "Density of Liquids and Solids": The density of Potassium sulfite was determined to be 2.353 g/cm³ at 20 °C.

The available value for Potassium sulfite is for the density. The key value should be entered as the relative (specific) density of the substance. Since no reference for this calculation is explicitly stated, it can be assumed that water at 4 °C (or, more precisely, 3.98 °C, which is the temperature at which water reaches its maximum density) is the reference. The density of water is (approximately) 1 g/cm3, which makes relative density calculations particularly convenient: the density of the object only needs to be divided by 1.