Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Transport and distribution:

Koc: The adsorption coefficient (Koc) of Cyclaprop has been established to be 1300, log Koc of 3.1, using the HPLC screening method (OECD121). This indicates that the substance will have a moderate potential to adsorb to sediment/soil.

Henry's law constant: To assess the volatilisation potential of the substance a Henry's law constant was calculated which gave a result of 2.432 Pa. m3/mol at 25°C. From the distribution modelling results it can be concluded that volatilisation is of minor importance in the environmental behaviour of Cyclaprop.

Based on Level III distribution modelling using EPISUITE(assuming equal and continuous releases to air, water and soil) using the CAS number 68912-13-0 (please note that the chemical structure in EpiSuite is not correct, the double bond should be in the other ring) and the measured physico-chemical parameters as input, it is estimated that the majority of the substance released to the environment will partition mainly into soil (75.4 %) and water (23.5%) with small amounts to sediment and air (1.04% and 0.114% respectively).

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 Kow and (non) ready biodegradability. The model predicts that 84.1% of the substance will partition to water, 13.8% to sewage sludge and 2.11% to air at 15°C.

Additional information