Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

Biodegradation in water:

The screening test to the ready biodegradability of the substance was calculated using the software BIOWIN v4.10.

The results indicate that 4-chlororesorcinol is not expected to be readily biodegradable.

Biodegradation in water and sediment:

Based on the Level III Fugacity Model, the half-life period of the 4-chlororesorcinol was estimated. The half life period of 4-chlororesorcinol in water is observed to be 15 days (360 hrs.) while in sediment it is 135 days (3240 hrs). Based on these half life values of 4-chlororesorcinol, it is concluded that the chemical is not persistent in water where as it is persistent in sediment. However, since there is negligible diffusion of the substance in the sediment as evident from the reported data (0.275 % in sediment) and hence persistence in the sediment compartment is not likely to becritical.

Biodegradation in soil:

EPI Suite has estimated that 4-chlororesorcinol is expected to be found predominantly in soil and its persistence estimate is based on its transformation in this medium. Its half-life in soil, 30 days (720 hrs),does not exceeds the threshold of 120 days as per Annex XIII of REACH. Therefore, 4-chlororesorcinol is estimated to be not persistent in the soil environment.