Registration Dossier

Data platform availability banner - registered substances factsheets

Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

Release to air, with an estimated vapour pressure of 10 -32 Pa at 25 deg C, indicates that Direct Brown 44 will not exist if not in dust particles in the atmosphere. In vapour-phase it will be degraded in the atmosphere by reaction with photochemically-produced hydroxyl radicals; the half-life for this reaction in air is estimated to be 0.6 hours; degradation in sunlight also occurs . If released to soil, it is expected to have very high mobility based upon a measured Koc of 1. Volatilization from moist soil surfaces is not expected to be an important fate process based upon an estimated Henry's Law constant of 10E-39 atm-cu m/mole. The substance is not ready biodegradable. If released into water, it is not expected to adsorb to suspended solids and sediment based upon the measured Koc. Estimated volatilization half-lives for a model river and model lake are 10E40 days. An estimated BCFof 3 suggests the potential for bioconcentration in aquatic organisms is low. Direct Brown 44 doesn’t hydrolyze easily.