reaction product of diphenylmethanediisocyanate, octylamine, 4-ethoxyaniline and ethylenediamine (1:0,37:1,53:0,05)

Endpoint summary

Additional information

Appearance

At ambient conditions Urea 4 is a white solid.

 

Melting point

The melting point of Urea 4 was determined according to EU method A.1, OECD Guideline 102 and EPA OPPTS 830.7200 guideline. No melting of Urea 4 was observed, but the test substance starts to decompose at about 280 °C using a heating rate of 10 K/min. Beginning at this temperature, Urea 4 changed from a white solid to a brown solid.

 

Density

The relative density of Urea 4 was determined according to EU method A.3, OECD Guideline 109, and EPA OPPTS 830.7300 guideline. The density of Urea 4 was determined to be 1.042 g/cm³ at 20 °C using a gas comparison pycnometer. The determination of the relative density of Urea 4 was performed by five-fold measurements of two independent test substance samples.

 

Vapour pressure

The vapour pressure of Urea 4 was estimated according to EU method A.4, OECD Guideline 104, and EPA OPPTS 830.7950 guideline. The vapour pressure of Urea 4 was estimated to be < 2 E-12 Pa at 25 °C based on the boiling point calculated and using the Modified Watson Correlation. From this result, it can be concluded that the vapour pressure of Urea 4 is too low to have any relevant effect on the environment.

 

Partition coefficient

The partition coefficient of Urea 4 was estimated according to EU method A.8 (Leo-Hansch method), OECD Guideline 117, and EPA OPPTS 830.7570 guideline. The partition coefficient of Urea 4 was estimated to be log Pow > 6 using the Leo-Hansch method. Urea 4 was not soluble in n-octanol and only slightly soluble in water. Therefore, due to the low solubility of Urea 4 in water and n-octanol and the low sensitivity of the analytical methods available the experimental determination of the partition coefficient by any analytical technique was technically not feasible.

 

Water solubility

The water solubility of Urea 4 was determined according to EU method A.6, OECD Guideline 105, and EPA OPPTS 830.7840, EPA OPPTS 830.7860 guideline and DIN EN 1484 guideline. Because of the low solubility of the test substance in water and the low sensitivity of the analytical method available the experimental determination of the water solubility of Urea 4 was technically not feasible.

Therefore, the water solubility of Urea 4 was estimated to be in the range of < 1 mg/L (quantification limit of the DOC measurements) at 20 °C +/- 1 °C. Thus, Urea 4 was considered to be slightly soluble or insoluble.

 

Auto flammability

The relative self-ignition temperature of Urea 4 was determined according to EU method A.16. Using a linear increase in temperature of 0.5 K/min, Urea 4 shows two exothermic reactions. The first exothermic reaction started at about 260 °C. A maximum temperature of about 300 °C was measured in the sample cube. The second exothermic heat effect started at about 380 °C. At the end of the run, Urea 4 showed a loss of mass of about 70 % and coloured black. As mentioned in IUCLID section 4.2 the test substance starts to decompose at about 280 °C. In conclusion, Urea 4 is not auto-flammable according to the criteria as described in the guidelines.

 

Flammability

The flammability of Urea 4 was determined according to EU method A.10. In contact with the ignition source, Urea 4 melted. The melt could be ignited with the flame and could sustain a burning reaction. However, a propagation of the reaction front with a flame on the surface of the test substance pile was observed. Thereby the burning time over a distance of 200 mm was determined to be 4.6 minutes. In conclusion, Urea 4 is not highly flammable according to the criteria as described in the EU method A. 10.

The flammability (contact with water) of Urea 4 was estimated according to EU method A.12. The chemical structure of Urea 4 does not contain chemical groups, which may lead to the conclusion that the test substance is capable of developing a dangerous amount of (flammable) gas in contact with air, damp air or water.

The pyrophoric properties of Urea 4 were estimated according to EU method A.13. From the structural formula of Urea 4 it was concluded that Urea 4 is not pyrophoric. The test substance does not contain any chemical group that might lead to spontaneously ignition a short time after coming in contact with air at room temperature (circa 20°C).

 

Explosiveness

The explosive properties of Urea 4 were estimated according to EU method A.14. From the structural formula of Urea 4 it was concluded that Urea 4 is not explosive. The test substance does not contain any chemically instable or highly energetic groups that might lead to an explosion.

 

Oxidizing properties

The oxidizing properties of Urea 4 were estimated according to EU method A.17. From the structural formula of Urea 4 it was concluded that Urea 4 has no oxidizing properties. The test substance does not contain any chemical group that might act as an oxidizing agent.