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No data exist for ethane-1,2-diol as it poses no hazrd to the environment. The hazard assessment of ethane-1,2-diol (CAS 107-21-1) reveals neither a need to classify the substance as dangerous to the environment, nor is it a PBT or vPvB substance, nor are there any further indications that the substance may be hazardous to the environment. Furthermore, the substance is considered as readily biodegradable. Additionally, as the log Koc is well below 3 and the substance has no cationic properties, a very low adsorption potential is indicated. Therefore, binding to sewage sludge is unlikely and as a consequence a transfer to the soil compartment is not expected. According to REACH Regulation (EC) No 1907/2006,  Chapter R.7c, Table R.7.11 - 2 (soil hazard categories) the substance belongs to hazard category 1. Following this the screening assessment would be based on the EPM (Equilibrium Partitioning Method). However, since no hazard is identified and no PNECs are derived for the aquatic compartment based on acute effect values > 100 mg/L for the trophic levels fish, aquatic invertebrates and algae and chronic effect values > 10 mg/L for aquatic invertebrates and algae) the EPM is not applied as no significant toxicity for the soil compartment is expected.

The substance is not bioaccumulative. Therefore, and because of reasons of animal welfare, no study on toxicity in birds is performed.