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:
no hazard 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 an aquatic or terrestrial 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

The lowest calculated acute result is a 96 hour EC50 for green algae of 13.6 mg/L and the lowest calculated chronic result is for aquatic invertebrates with a NOEC of 1.2 mg/L. A measured log Kow of 2.31 - 2.4 for members of the butenes category indicates the potential for bioaccumulation to be low. Measured data are not available to demonstrate that butenes are readily biodegradable but QSAR estimates indicate that biodegradation is expected to be rapid. In addition, butenes are expected to rapidly partition to the air from water, further reducing the potential for exposure. Taken together, these results do not support any classification for acute or chronic hazard to the environment under the CLP Regulation. 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 Regulation.