Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

No data is available for L-threonine mother liquor. Henry's Law constant of threonine as the main constituent of L-threonine mother liquor 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 Pa x 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 L-threonine mother liquor are not available.

According to REACH Regulation (Annex VIII, 9.3.1, column II), the study on adsorption/desorption does not need to be done if the the test material is readily biodegradable. Biofert Plusz (mixture of L-threonine mother liquor and modified waste) proved to be readily biodegradable. Based on the composition of Biofert Plusz this statement applies likewise to the test material under investigation (L-threonine mother liquor).

L-Threonine mother liquor is a complex mixture containing organic and inorganic components (UVCB-substance). Based on the log Kow of the lead component L-threonine of L-threonine mother liquor (-2.94; Hansch, 1995) the sorption onto sediment organic matter is expected to be negligible.