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Ecotoxicological information

Short-term toxicity to aquatic invertebrates

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Administrative data

Link to relevant study record(s)

Description of key information

- Toxicity testing to Daphnia magna was conducted with and without pH adjustment ( EC 440/2008 C.2, OECD 202)
The dry solids/water ratio (dwt/wwt) of the tested sample was 17/83 % by weight.
Without pH adjustment:
- EC50 (48 h) for D. magna 4.6 mg/l (dwt.) (27 mg/l (wwt))
- NOEC (48 h) for D.magna 2.2 mg/l (dwt.) 13 mg/L (wwt.)
With pH adjustment:
- EC50 (48 h) for D. magna 4.4 mg/l (dwt.) (26 mg/l (wwt.))
- NOEC (48 h) for D.magna 2.2 mg/l (dwt.) (13 mg/l (wwt.))

Key value for chemical safety assessment

Fresh water invertebrates

Fresh water invertebrates
Effect concentration:
4.4 mg/L

Additional information

White liquor showed high acute toxicity to aquatic invertebrates in the key studies. Daphnias were the most sensitive organisms to White liquor among the tested. No other data on toxicity to aquatic invertebrates was available.

Due to the high alkalinity of White liquor the test was conducted with and without pH adjustment to be able to identify the possible impact of high pH. The dry solids/water ratio (dwt./wwt.) of the tested sample was 17% / 83 % by weight.

Short-term toxicity to invertebrates:

EC50 (48h) values for Daphnia magna were 4.4 mg/l (dwt.) and 4.6 mg/l (dwt.) (26 and 27 mg/l (wwt.))

NOEC (48h) value for Daphnia magna was 2.2 mg/l (dwt) (13 mg/l (wwt.)) in both cases.