Registration Dossier

Administrative data

Endpoint:
toxicity to terrestrial plants: long-term
Data waiving:
other justification
Justification for data waiving:
other:
Justification for type of information:
JUSTIFICATION FOR DATA WAIVING
In accordance with column 2 of REACH Regulation (EC) No 1907/2006, Annex IX and X, in case no long and short term tests regarding toxicity to plants (required in section 9.4.3 and 9.4.6) are available , the equilibrium partitioning method may be applied to assess the hazard to soil organisms. According to its physico-chemical properties lithium nitrate is not expected to be distributed into soil and the ad-/desorption behaviour does not indicate that lithium will be present in the soil. The log Kd value for soil was found to be 2.57, i.e. adsorption potential to soil can be regarded as neglible (refer to IUCLID section 5.4). Thus, concentration and consequently effects in sediment are negligible. Additionally, nitrate naturally occurs in water and is a natural component of soil minerals. Therefore, no further testing is needed for the soil compartment.
An existing study with terrestrial plants (maize; Zea mays L., family: Poaceae) further shows that lithium exposure does not lead to any significant terrestrial toxicity to plants. In this study an LC50 of 140 mg/L was determined for treatment period of 2 months (rf. to IUCLID section 6.6 additional ecotoxicological information). This study can be regarded as worst case as the plants were treated under hydroponic conditions.

Data source

Materials and methods

Results and discussion

Applicant's summary and conclusion