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Physical & Chemical properties

Water solubility

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Description of key information

Liquid: The substance is a 25% solution in water, therefore performing a study is scientifically unjustified.

Solid: The test item disodium tetrasulfide (EC no. 215-686-9) is miscible in a 1 : 1 ratio mixture (w/w) with water (at 20 °C).

Key value for chemical safety assessment

Water solubility:
1 000 mg/L
at the temperature of:
20 °C

Additional information

Solid: The water solubility of the test item disodium tetrasulfide (EC no. 215-686-9) was determined according to OECD guideline no. 105 [adopted on 27 July 1995] and EU test method A.6 [Directive 92/69/EEC, Official Journal L 383 A 1992] with the modified flask method. Principle of the flask method: The substance is dissolved in water at a temperature somewhat above the test temperature, such that a portion of the substance remains undissolved. When saturation is achieved, the mixture is cooled and kept at the test temperature until equilibrium is reached. Subsequently, the mass concentration of the substance in the aqueous solution, which must not contain any undissolved particles, is determined by a suitable analytical method.

The test item disodium tetrasulfide (EC no. 215-686-9) is miscible in a 1 : 1 ratio mixture (w/w) with water (at 20 °C).