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Ecotoxicological information

Toxicity to terrestrial plants

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Description of key information

In accordance with REACH Annex XI, the study does not need to be conducted as in water sodium carbonate is dissociated into sodium and carbonate ions and both ions will not adsorb on particulate matter. Therefore, direct and indirect exposure of the soil compartment, via the use of sludge of an STP, is unlikely. Furthermore, it should be realised that sodium carbonate is naturally present in soil and toxicity for terrestrial plants is expected to be low.

Few reliable studies are available exposing different species of plants to Na2CO3. Overall, the different authors expose the plants via water irrigation or using and hydroponics system, growing plants in a water based nutrient rich solution, hence all available data are express in terms of mg/L rather than mg/kg soil. Here is presented a summary table of the results:

Time exposure

species

Concentration range exposure

Effective concentration

Based on

Reference

10 weeks

seeds of sorghum, Sorghum bicolor

60and120mM

LOEC 6359 mg/l

growth

Sial et al., (2019)

14 days

seedlings of rice, Oryza sativa

5-20 mM

LOEC 530 mg/l

growth

Bu et al., (2012)

14 days

seedlings of rice, Oryza sativa

5-20 mM

LOEC 530 mg/l

growth

Li et al., (2017)

7 days

seeds of the bitter vetch, Vicia ervilia

5 -25 mM

LOEC 1060 mg/l

Germination rate

Seperhri et al., (2016)

Key value for chemical safety assessment

Additional information

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