Registration Dossier
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EC number: 268-615-9 | CAS number: 68131-33-9 The solution formed by reacting the sodium salts of green liquor with calcium hydroxide.
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
- EC50 (72 h) for Pseudokirchneriella subcapitata 77.7 mg/l (growth rate) (EC 440/2008 C.3, OECD 201 )
- NOEC (72 h) for Pseudokirchneriella subcapitata 18.8 mg/l (growth rate) ( EC 440/2008 C.3, OECD 201)
Key value for chemical safety assessment
- EC50 for freshwater algae:
- 77.7 mg/L
- EC10 or NOEC for freshwater algae:
- 18.8 mg/L
Additional information
White liquor was toxic to aquatic algae in the key study, but the toxicity was lower that for aquatic invertebrates. The dry solids/water ratio of the tested sample was 17/83 % by weight (dwt/wwt).
Toxicity to aquatic algae:
EC50 (72h) value for Pseudokirchneriella subcapitata was 77.7 mg/l (dwt.) 457.1 mg/l (wwt.).
NOEC (72h) value for Pseudokirchneriella subcapitata was 18.8 mg/l (dwt.) 110.6 mg/l (wwt.).
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