Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

The primary source of possible substance environmental release is represented by industrial waste waters, thus the fate and pathways of the substance in surface water is of primary concern.

Considering the intended use in aqueous-based treatments, Direct Orange 118 is not expected to be directly released to air, either soil. Based on the physicochemical properties expected, the air compartment can be considered as not relevant.

Direct Orange 118 is a powder at room temperature and it is expexted to be very soluble in aqueous solutions.

In the aquatic environment, hydrolysis is not expected to be an important removal process for Direct Orange 118, due to the chemical characteristics.

Phototransformation in air/water/soil has not been investigated.

The substance is neither readily nor inherently biodegradable.

The binding capacity (or “stickiness”) of the Direct Orange 118 to solid surfaces is expected to be low, on the basis of the estimated value.

There are no empirical bioaccumulation data available for Direct Orange 118, nevertheless it is expected to be characterized by a low potential for bioaccumulation and/or a low potential to cross biological membranes.

Additional information