Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

Biodegradation in water

Primary degradation of the substance itself is rapid but significant ultimate degradation has not been demonstrated.

Modelling of possible biodegradation pathways estimated by enviPath, according to the biotransformation rules, indicates that aerobic degradation of 1,2,3,6-tetrahydro-3-methylphthalic anhydride is likely; the degradation products were identified until two transformation levels.

All these substances were subjected to a Biodegradation screening assessment, according to the EPA BIOWIN 4.10 model.

According to the evaluation criteria set in the ECHA Guidances Chapters R.7b and R.11, 1,2,3,6-tetrahydro-3-methylphthalic anhydride was estimated as being inherently biodegradable and not  potentially P or vP to the environment.