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Physical & Chemical properties

Density

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Description of key information

Liquid: The relative density D20 4 of sodium polysulfide solution is 1.2034

Solid: The density of the test item disodium tetrasulfide (EC no. 215-686-9) at 20 °C  ρ = 2123 kg/m³, the relative density D4 20 = 2.124.

Key value for chemical safety assessment

Relative density at 20C:
1.203

Additional information

Liquid: The relative density of the test item sodium polysulfide solution was determined according to OECD guideline no. 109 [adopted on 27 July 1995] and EU test method A.3 [Regulation 92/69/EEC, Official Journal L 383 A 1992] with the oscillating densitometer method. A mechanical oscillator, constructed in the form of a U-tube, is vibrated at its resonance frequency which depends on its mass. Introducing a sample changes the resonance frequency.

The relative density D20 4 of solids or liquids is the ratio between the mass of a volume of substance to be examined, determined at 20 °C, and the mass of the same volume of water, determined at 4 °C. The relative density has no dimension. The relative density D20 4 of sodium polysulfide solution is 1.2034

Solid: The density and the relative density of the test item disodium tetrasulfide (EC no. 215 -686 -9) were determined in a study according to Council Regulation (EC) No. 440/2008, method A.3. According to this guideline, the density is determined by measuring the volume of a known mass of the test substance by means of a gas displacement pycnometer. For the calculation of density the mass of the test substance is measured with an analytical balance following the volume measurement. The density of the test item at 20 °C ρ = 2123 kg/m³, the relative density D4 20 = 2.124.