Bis(2-ethylhexyl) carbonate

Endpoint summary

Additional information

The test substance Bis(2-ethylhexyl) carbonate is an organic compound, which is characterised as a clear, colourless liquid. The melting point of the test substance is lower than -100°C when tested according to OECD Guideline 102 (Melting point / Melting Range) and EU Method A.1 (Melting / Freezing Temperature). 

According to OECD Guideline 103 (Boiling point/boiling range) and EU Method A.2 (Boiling Temperature) a boiling point of 317°C at 1013.3 hPa was determined.

A relative density D(20/20)=0.897 was determined (water and test item: 20°C). The relative density D(4/20) was calculated to 0.90 (water:4°C, test item: 20°C).

According to REACH Regulation (Annex VII, 7.14, column II), the study on granulometry does not need to be performed if the substance is marketed or used in a non solid or non granular form.

The vapour pressure of Bis-(2-ethylhexyl) carbonate was determined to be 1.0E-04 hPa at 20°C and 2.2E-4 hPa at 25°C according to OECD Guideline 104 (Vapour Pressure Curve, 1992) and EU Method A.4 (Vapour Pressure, 2008).

A log Kow > 4.1 (at 21°C) was determined for Bis(2-ethylhexyl)carbonate according to OECD Guideline 107 (HPLC Method, 2004) and EU Method A.8 (Partition Coefficient, 2008). In deviation from the recommendation of the OECD, the guideline 107 (suitable for log Kow values in the range (-2 to 4) was used because the test item is not UV-active and the estimation via HPLC//UV/VIS or Dioden Array Detector was not possible. This value is supported by the calculation that yielded a log Kow (log Kow=6.96 at 25°C) was estimated using EPIWIN v3.20, KOWWIN v1.67.

The water solubility of Bis(2-ethylhexyl) carbonate was determined in a study conducted according to OECD Guideline 105 and EU-Method A.6. using the flask method and GC/FID for analysis. A water solubility <0.030 mg/L at 20°C was obtained without taking into account the purity of the test substance. Bis(2 -ethylhexyl) carbonate can be regarded as insoluble in water.

According to REACH Regulation (Annex VII, 7.6, column II), the study on surface tension does not need to be performed if the water solubility is <1 mg/L at 20°C.

The flash point of 159.5°C at 1013 hPa was determined for Bis(2-ethylhexyl) carbonate. It was determined according to DIN EN ISO 2719: 2002 (Determination of flash point - Pensky-Martens closed cup method, 2002) and EU Method A.9 (Flash-Point, 2008).
The auto-ignition temperature of Bis(2-ethylhexyl) carbonate was determined to be 315°C at ca.1009 hPa according to EU Method A.15 (Auto-Ignition Temperature (Liquids and Gases) 2008), DIN (DIN Guide 51794: "Determining the Ignition Temperature of Petroleum Products", May 2003).

According to REACH Regulation (Annex XI, 1.), the study on flammability does not need to be done if the available data are sufficient for assessment. For liquids the relevant endpoint is the flash point. According Directive 67/548/EEC and Regulation (EC) No 1272/2008 (EU GHS) the test substance fulfils no criteria for classification. A flammable liquid is defined as a liquid having a flash point of not more than 60 °C. A flash point of 159.5°C at 1013 hPa was determined for Bis(2-ethylhexyl) carbonate.

The heat of decomposition was below 500J/g. Therefore the test on explosive properties was not necessary. The test item has no danger of explosion according to the explosive properties in the sense of the consolidated version of Council Directive 67/548/EEC Annex V, A.14.

According to REACH Regulation (Annex VII, 7.13, column II), testing of oxidising properties does not need to be conducted as the test substance does not contain any structural groups known to be correlated with a tendency to react exothermically with combustible material.

According to REACH Annex IX, 7.15, column 1, a study on stability in organic solvents is only required if stability of the substance is considered to be critical. The substance is stable in organic solvents.

The test substance can be regarded is thermally stable at temperatures up to 500°C. The thermal stability of Bis(2 -ethylhexyl) carbonate was investigated in a study conducted according to OECD Guideline 113 'Screening test for thermal stability and stability in air'.

The viscosity of Bis(2-ethylhexyl) carbonate was calculated using "method 2" published by Grain (1990) and which is based on the equation by van Velzen et al (1972) being log ηL= B3(1/T – 1/T0). The calculation yielded a viscosity of 5.94 mPa s at 20°C.

According to the "Guidance on information requirements and chemical safety assessment, Chapter R.7a: Endpoint specific guidance, May 2008", the applied estimation method is a recommended method for the evaluation of non experimental data for viscosity.

This calculation is supported by data from the materail safety data sheet: The viscosity of Bis(2-ethylhexyl) carbonate is reported to be 6 mPa s at 20°C (Method: Brookfield-Visc.RVT Sp.1).