Benzene, (1-methylethyl)-, oxidized, polyphenyl residues

Endpoint summary

Additional information

In the safety data sheet, Z-Oil is described as a dark-brown to black organic liquid with a pungent, intensive aromatic odor. The melting point of the test item was determined to be -44.4°C at 1013 hPa in a study conducted to according to OECD Guideline 102 and and EU Method A.1 by differential scanning calorimetry (DSC). The boiling point of Z-Oil was investigated in a study conducted according to EU Method A.2 and OECD Guideline 103 using the method according to Siwoloboff. Based on three measurements at 981 hPa, a mean boiling point of 288°C at 1013 hPa was calculated. The density (20°C) and relative density (20/4) determined according to guideline (OECD Guideline 109, EU Method A.3) were found to be 1110 kg/m³ and 1110, respectively. According to REACH Regulation (Annex VII, 7.14, column II), the study on granulometry does not need to be conducted if the substance is marketed or used in a non granular or non solid form. Z-Oil is marketed and used solely as aqueous solution. The vapour pressure of the test item was determined in a study conducted according to OECD Guideline 104 and EU Method A.4. Based on measured values, vapour pressures of 3.3, 5.1 and 37 Pa at temperatures of 20, 25, and 50°C were calculated via the Antoine equation. According to REACH Regulation (Annex XI, 2), the study on a specific endpoint does not need to be done if the study is technically not feasible due to the inherent properties of the substance. The experimental determination of the octanol-water partition coefficient of Z-Oil is technically not possible as a consequence of the properties of this UVCB-substance.

In a study conducted according to ISO 2719 and EU Method A.9 (Flash-Point; 2008) the flash point (closed cup) was determined to be 94.275°C at 1011 hPa.The auto-flammability (self-ignition temperature) was investigated in a study conducted according to EU Method A.15. The self-ignition temperature was found to be 495°C at 1006 hPa.The flammability of Z-Oil in contact with water was investigated in a study conducted according to EU Method A.12. No gas evolved in any of the tests. Therefore, the test material is not regarded as hazardous in the sense of the EC Regulation No. 440/2008, Method A.12. Based on the results obtained from DSC measurements (no exothermal effects up to 500°C, heat of decomposition below 500 J/g) the test item has no explosive properties in the sense of the European Commission Regulation (EC) No. 440/2008, Method A.14 and in the sense of the EPA Product Properties Test Guideline OPPTS 830.6316. In a study conducted according to EU Method A.21 (Oxidizing Properties (Liquids), 2008) the mean pressure rise times of the reference substance (nitric acid/cellulose) and the test item (Z-Oil/cellulose) were determined to be 5.52 and 25.13 s, respectively. Based on the results (mean pressure rise time of test item > mean pressure rise time of reference substance) Z-Oil has no oxidising properties under the test conditions in the sense of the European Commission Regulation (EC) No. 440/2008, Method A.21. According to REACH Regulation (Annex IX, column I), the study on the stability in organic solvents and identity of relevant degradation products does only to be done if it is regarded as a substantial property of the substance. Based on the main ingredients (acetophenone, phenol, p-cumyl phenol) it is to be expected that the substance is stable in organic solvents. Moreover the recommended standard testing procedure (OECD 116) can only be applied to pure substances and is not feasible for UVCB substances. The thermal stability of Z-Oil was investigated in a study conducted according to OECD Guideline 113. The DSC measurements in closed glass and stainless steel crucibles with the test material showed no exothermal effects up to the maximum temperatures (460 and 500°C) and no endothermal effects below 150°C. Therefore the test material can be regarded as thermally stable. According to REACH Regulation (Annex XI, 2), the study on a specific endpoint does not need to be done if the study is technically not feasible due to the inherent properties of the substance. The kinematic viscosity of Z-Oil could not be determined using the capillary method described in the OECD Test Guideline 114 (2012) due to the black colour of the test item and due to the fact that the test item is not a Newtonian liquid, so that the flow of the test item through the capillary was very slow and different at different places in the capillary: at the capillaery wall the test item remained much longer as inside the liquid and due to that, a meniscus of the liquid could not be observed. According to REACH Regulation (Annex XI, 2.) testing of a specific endpoint may be omitted, if it is technically not possible. The determination of the dissociation constant is not applicable for complex mixtures like Z-Oil (UVCB-substance).