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Environmental fate & pathways

Adsorption / desorption

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Description of key information

Adsorption coefficient (Koc): < 32 (HPLC, OECD TG 121)

Key value for chemical safety assessment

Additional information

The adsorption coefficient (Koc) of L-glutamic acid diacetic acid tetrasodium salt (GLDA-Na4) was estimated using the High Performance Liquid Chromatography (HPLC) method. The average measured Koc value for GLDA-Na4 in the ionized form (pH 2) as well as in the nonionized form (pH 7) as calculated from the test is < 32 (Log Koc < 1.5). This indicates that GLDA-Na4 will be mobile in soil and not be sorbed by sludge in a sewage treatment plant.