Zinc Chelate Complex

Endpoint summary

Description of key information

Physical state/appearance,colour:

Appearance, physical state and colour were tested as part of the analytical characterization of the test item. The test item is a non-volatile, odourless, colourless solid.

Melting point:

The study was conducted in accordance with OECD test guidelines n. 102 and EU method A.1, using the capillary method.. The melting range of LZ 61000 was found to be 128.5°C ± 0.14°C (95% confidence interval).

Boiling point:

The study was conducted in accordance with OECD test guidelines n. 103 and EU method A.2, using the Siwoloboff method. Boiling point of the test item was not observed before the apparent degradation of the test item above 200°C.

Relative density:

The study was conducted according to OECD test guideline no. 109 and EU method A.3, using a gas comparison pycnometer. The relative density was determined to be 1.70.

Particle size distribution:

The particle size distribution of the test item was determined by means of Laser Diffraction Analysis (ISO 13320)using the medium volume (wet) module (MVM).The D50 of the test item was determined to be 15.7 µm, the D10 was 7.67 µm and the D90 was 45.6 µm. The MMAD of the test item, for the relative density and the mean D50, was calculated to be 20.5 µm.

Vapor pressure:

The study was conducted according to OECD test guideline no. 104 and EU method A.4, applying the isothermal TGA effusion method. No decomposition of the test tem observed. The vapor pressure was found to be 3.6 x 10E-2 Pa = 2.7 x 10E-4 mm Hg at 20°C and 6.3 x 10E-2 Pa = 6.3 x 10E-4 mm Hg at 25°C.

Partition coefficient:

The partition coefficient n-octanol/water (Pow) was measured according to OECD test method no. 117, using the HPLC-method with UV-detection. The substance to be registered is not stable and hydrolyses within a few minutes when in contact with water: Therefore, it was decided to measure the partition coefficient of the degradation product itself. The Log Pow (n-octanol/water) of the degradation product was determined to be 0.885 at 25 °C.

Water solubility:

The water solubility was measured according to OECD test method no. 105, using the flask shake method with HPC/UV-detection. The substance to be registered is not stable and hydrolyses within a few minutes when in contact with water: Therefore, it was decided to measure the water solubility of the degradation product itself. The water solubility of LZ 399 was found to be 276 ± 16 g/L at 20°C..

Surface tension of an aqueous solution:

The study was conducted in accordance with OECD test guidelines no. 115 and EU method A.5, using the ring method. The surface tension value was found to be 68.72 mN/m at 20.17°C. As the surface tension value of the 90% of the saturated aqueous solution of the test was greater than 60 mN/m, the test item is classified as not being a surface active substance.

Flash point:

The study does not need to be conducted because the flash point is only relevant to liquids and low melting point solids.

Flammability:

The study was performed in accordance with EU method A.10. In the pre-test, a hot flame from a gas burner was applied to one end of the powder train for a maximum of 2 minutes. The test item did not propagate by combustion neither by burning with a flame or smouldering, therefore, no further testing was performed. The test item, LZ 61000 is considered to be non-flammable under the conditions of this test.

The studies A.12 and A.13 were not performed, as the substance will hydrolyze immediately in contact with water or humid air. There are no flammable gases formed during hydrolysis. Hydrolysis was confirmed in a hydrolysis study according to OECD 111.

Autoflammability:

The study was performed in accordance with EU method A.16. No ignition of the test item was observed up to 400°C, but the test item was melted. Based on the results, the test item is considered not to be auto-flammable.

Explosiveness:

Study scientifically not necessary; study does not need to be conducted because there are no chemical groups present in the molecule which are associated with explosive properties.

Oxidizing properties:

Study scientifically not necessary; study does not need to be conducted because there are no chemical groups present in the molecule which are associated with oxidising properties and the substance is incapable of reacting exothermically with combustible materials.