Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Adsorption / desorption

In accordance with column 2 of REACH Annexes VIII, IX and X, an adsorption/desorption screening study and further studies do not need to be conducted, because the substance has a low potential for adsorption due to a low octanol-water partition coefficient, and the substance and its relevant degradation products decompose rapidly.

Additional information

Adsorption / desorption

Based on a calculated Koc of 1 (PCKoc v1.66), 1,3 -butanediol is expected to have high mobility in soil (ECT, 2008).

Henry's Law constant / Other distribution data

The Henry's Law constant (HLC) was estimated to be 0.0233 Pa*m³/mol at 25 °C. Taking this value, volatilization half-lives of 101 and 1102 days were estimated by EPIWIN v3.20 for a model river and a model lake, respectively (ECT, 2008)