Methoxycarbonyloxycyclooct-4-ene

Endpoint summary

Description of key information

The adsorption potential of the test substance was determined in a HPLC screening test according to EU Method C.19 and in compliance with GLP criteria. Solutions of reference substances with known log Koc values based on soil adsorption data and the test substance were analysed by HPLC using a Hypersil H5CPS column. The log k’ values of reference substances were plotted against the known log Koc values. The log Koc value for the test substance was calculated by substituting its mean log k’ in the calibration curve. Under the conditions of the test, the log Koc of the test substance was determined to be 3.16, which is equivalent to a Koc value of 1445 L/kg.

A Henry's law constant of 0.85 Pa·m³/mol (at 12°C) was calculated in EUSES (184.2 g/mol molecular weight, vapour pressure 4.02 Pa (25°C), and 415 mg/L water solubility (18°C)). Based on this value the substance has no potential to partition from water to air under environmental conditions (12°C).

Based on Level III environmental distribution modelling using EPISUITE (assuming equal and continuous releases to air, water and soil) using the SMILES notation O=C(OC1CCC=CCCC1)OC and the measured physico-chemical parameters (water solubility (at 25 °C) and log Kow) as input, it is estimated that the majority of the substance released to the environment will partition mainly into soil (66.7%) and water (32.5%) with small amounts to air (0.5%) and sediment (0.3%).

The SimpleTreat model, which is incorporated in EUSES simulates the distribution of the substance in a Sewage Treatment Plant based on vapour pressure, water solubility, log Koc and ready biodegradability. Model calculations show that 77% of the substance will be degraded, and that 11.5 %, 11.3%, and 0.3% will partition to sludge, water, and air, respectively.