Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Based on the relevant physical-chemical properties, the known use pattern (release to water) and the assuming no biodegradability, HMDTMP and its salts will partition primarily to water and suspended sediments. In the sewage treatment plant the substance is not expected to degrade, but will be removed on sewage sludge (approximately 80%) and be present in the effluent (approximately 20%).

Additional information

Because HMDTMP and its salts behave in aqueous medium in accordance with the pH and composition of the medium, the conclusions in this section apply to both acid and salts.

The compartmental approaches expressed in the Mackay models at Level I and Level III have been used to give an indication of relative partition tendencies, but not predicted concentrations. This qualitative approach is sufficient for the present purpose.

Using fugacity based models HMDTMP (23605-74-5) is predicted to migrate primarily to sediment following release via water, and migrate primarily to soil when released by other pathways.