Caesium chloride

Endpoint summary

Additional information

Appearance:

Cesium chloride is a white, odourless inorganic solid in a crystalline form.

Melting point:

The melting point of cesium chloride was determined to be 642 °C at 1013.25 hPa.

Boiling point:

In accordance with column 2 of Reach Regulation (EC) No 1907/2006 Annex VII section 7.3, the study does not need to be conducted for solids which either melt above 300 °C or decompose before boiling. The melting point of cesium chloride was determined to be 642 °C at 1013.25 hPa (see above or IUCLID Section 4.2: Key.001.Melting point.AQura GmbH.2010).

Density:

The density of cesium chloride was determined to be 3.97 g/cm³ at 20 °C.

Particle size distribution:

The averages of three measurements were as follows: d10: 188 µM, d50: 344 µM, d90: 556 µM.

Vapour pressure:

In accordance with column 2 of Reach Regulation (EC) No 1907/2006 Annex VII section 7.5, the vapour pressure does not need to be conducted if the melting point is above 300 °C. The melting point of cesium chloride was determined to be 642 °C at 1013.25 hPa (see above or IUCLID Section 4.2: Key.001.Melting point.AQura GmbH.2010). Therefore, a study on vapour pressure is not required.

Partition coefficient:

In accordance with column 2 of REACH Regulation (EC) No 1907/2006 Annex VII, the test on partition coefficient n-octanol/water (required in REACh Regulation, Annex VII, section 7.8) does not need to be conducted if the substance is inorganic. Cesium chloride is an inorganic compound. The log Kow of the cesium chloride was estimated to be 0.54. However, cesium chloride is an inorganic salt and the value calculated with the program KOWWIN should be considered with caution. Due to the salt character of cesium chloride and its good water solubility the log Pow is assumed to be around 0.

Water solubility:

The water solubility of cesium chloride was determined to be > 1000 g/L at 20 °C. Therefore, the test item is very soluble.

Surface tension:

The surface tension of cesium chloride was determined to be 72.8 mN/m at 20 °C.

Flash point:

As cesium chloride is a solid at room temperature, the determination of the flash point is scientifically unjustified and therefore was not performed. Instead, a test on flammability for solids upon contact with air was conducted (see below or IUCLID Section 4.13).

Autoflammability:

Up to about 400 °C no exothermic reaction of the sample was observed.

Flammability:

Because of the results of the preliminary test, cesium chloride is considered non flammable. No flammability in contact with water and no pyrophoric properties are expected for the test item.

Explosivness:

As the sample was neither shock sensitive nor thermally or friction sensitive, according to the criteria of the EU Method A.14, cesium chloride is not representing an explosive hazard and has not be considered to present a danger of explosion.

Oxidising properties:

Test on oxidizing properties of cesium chloride was performed according to the EC Method A.17. The highest burning rate of 3.22 mm/s was obtained with the mixture of 10 % test item: 90 % cellulose. This rate was definitely lower than the highest rate of the reference mixtures (3.63 mm/s). Therefore the test item is assessed to have no oxidizing properties.

Stability in organic solvents:

In accordance with column 2 REACH Regulation (EC) No 1907/2006 Annex IX section 7.15, the study which examines stability in organic solvents does not need to be conducted as the test substance cesium chloride is an inorganic substance.

Dissociation constant:

The dissociation constant was not determinable because cesium chloride is a strong electrolyte.

Viscosity:

The study which examines viscosity and is required according to REACH Regulation (EC) No 1907/2006 Annex IX section 7.17 does not need to be conducted as the test substance cesium chloride is not a liquid.