Registration Dossier

Administrative data

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:
no hazard identified

Marine water

Hazard assessment conclusion:
no hazard identified

STP

Hazard assessment conclusion:
no hazard identified

Sediment (freshwater)

Hazard assessment conclusion:
no hazard identified

Sediment (marine water)

Hazard assessment conclusion:
no hazard identified

Hazard for air

Air

Hazard assessment conclusion:
hazard related to composition of atmosphere identified

Hazard for terrestrial organisms

Soil

Hazard assessment conclusion:
no hazard identified

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
no potential for bioaccumulation

Additional information

Substance is a gas and is extremely unlikely to reside in the aquatic or terrestrial compartment. Deriving a PNEC for a gas is unreasonable and technically of little use for risk assessment as the substance will not be present in the aquatic or terrestrial environment.

Conclusion on classification

As ethylene is a gas at standard temperature, aquatic toxicity tests would not be relevant as adaptations to the method for gases would not provide realistic representations of the behaviour of ethylene in the environment. Therefore, the ECOSAR model and Target Lipid model were used to calculate the likely toxicity of ethylene to aquatic organisms. The Lowest Chronic value reported by the QSARs was for chronic toxicity to invertebrates with a NOEC of 6.31 mg/l

 

A measured log Kow of 1.13 for ethylene indicates the potential for bioaccumulation to be low. Measured data are not available to demonstrate that ethylene is readily biodegradable, but QSAR estimates indicate that biodegradation is expected to be rapid.

Taken together with the acute toxicity results, these results do not support any classification for acute or chronic hazard to the environment under the CLP Regulations.