Sodium hydrogensulfite

Density

Link to relevant study record(s)

Reference

Endpoint:

density

Remarks:

density

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

test procedure in accordance with national standard methods with acceptable restrictions

Remarks:

Acceptable documentation of the determination of the relative density.

Qualifier:

according to guideline

Guideline:

other: DIN 51 757

Deviations:

not specified

GLP compliance:

no

Type of method:

pycnometer method

Type:

density

Density:

1 304 kg/m³

Temp.:

20 °C

Remarks on result:

other: fass fraction: 37g NaHSO3/100g

Type:

density

Density:

1 360.3 kg/m³

Temp.:

20 °C

Remarks on result:

other: fass fraction: 42g NaHSO3/100g

Conclusions:

The density was determined to be 1304 kg/m³ for a mass fraction of 37 g NaHSO3/100g and 1360.3 kg/m³ for a mass fraction of 42 g NaHSO3/100g.

Executive summary:

The density of a aqueous solution of Natrium hydrohensulfite was determined by the pycnometer method. Results showed that the density was 1304 kg/m³ for a mass fraction of 37 g NaHSO₃/100g and 1360.3 kg/m³ for a mass fraction of 42 g NaHSO₃/100g.

Description of key information

Density of Sodium hydrogensulfite = 1304 kg/m³ at 20 °C (mass fraction of 37 g/100g) and 1360.3 kg/m³ for a mass fraction of 42 g NaHSO3/100g.

Relative density at 20 °C: 1.304 (37 wt% aq. solution) and 1.360 (42 wt% aq. solution).

Additional information

Sodium hydrogensulfite (7631-90-5) is not known in the solid state. On concentrating an aqueous solution, solid sodium disulfite (7681-57-4) crystallises.

However, for evaluation of this endpoint one analytical report was used. In the analytical report from (Woll, 1992) the density of an aqueous solution of the test item was determined by the pyknometer method. 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, which results in a relative density of approximately 1.3 measured at 20 °C.