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Lithium is readily absorbed by plants, causing plants to be an indicator of soil lithium concentrations. The concentrations in plants show a wide variation, depending on the geographical location. It is reported that lithium is not a dietary mineral for plants, but stimulates plant growth. The amount of lithium in plants usually is between 0.5 and 3 ppm (dry mass).

In contrast to natural background exposure, no relevant exposure (linked to manufacturing or use of lithium hydroxide) of the terrestrial compartment is to expect, as lithium has no potential to adsorb to soil and hydroxides are natural components of soil minerals. In addition to that, the available information indicate low environmental concern with respect to aquatic toxicity or to toxicity to mammals. According to the available data, an input via sludge application on agricultural soil is considered to be negligible, as lithium hydroxide does not adsorb to the sewage sludge to a significant extent. Pursuant to its physico-chemical properties lithium hydroxide is not expected to be distributed into soil. It can be concluded, that the risk for the terrestrial compartment is low and no further information and/or testing is needed.