Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

Henry's Law constant of threonine as the main constituent of Biofert plusz was calculated using EPIWIN (v4.0), HENRYWIN (v3.20). The calculation of Henry's Law constant according to the equation H=vp/ws yielded a value of 7.34E-009 Pax m3/mole using an estimated water solubility of 2.79e+005 mg/l and a vapour pressure of 7.88E-009 mm Hg. Based on the result, threonine can be considered as practically non-volatile from aqueous solution.

Experimental studies on adsorption/desorption of Biofert are not available.

According to REACH Regulation (Annex VIII, 9.3.1, column II), a study on adsorption/desorption does not need to be done if the the test material is readily biodegradable.

Biofert Plusz is a complex mixture containing organic and inorganic components (UVCB-substance). Based on the log Kow of the lead component L-threonine (-2.94; Hansch, 1995) the sorption onto sediment organic matter is expected to be negligible. Furthermore, the target compartment of exposure is soil according to the intended uses.