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Diss Factsheets

Ecotoxicological information

Toxicity to soil macroorganisms except arthropods

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Administrative data

Link to relevant study record(s)

Description of key information

No soil macroorganism toxicity studies are available for DTPA acid.

Key value for chemical safety assessment

Additional information

Soil exposure is unlikely, since there is no direct application of DTPA Acid on soils. In addition, laboratory testing of solutions of H4EDTA and ZnEDTA were eluted through various surface soils and were found to move quite readily through the soils and be only very slightly adsorbed (Cheng et al., 1972). A model calculation of the distribution of EDTA metal complexes between water and suspended solids resulted in a finding that <1% of the total EDTA is adsorbed, and according to the fugacity model Mackay level I, the preferred environmental component for EDTA is the hydrosphere (99.999%) (EU, 2004). Thus, based on a read across approach from EDTA, low adsorption is predicted for DTPA, and soil testing is therefore not necessary for DTPA, especially since there is no direct application of DTPA Acid to soils.