Registration Dossier

Data platform availability banner - registered substances factsheets

Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

Currently viewing:

Administrative data

Link to relevant study record(s)

Description of key information

One reliable acute/chronic toxicity data point (Klimisch 1, GLP) for an algae species – the green alga Pseudokirchneriella subcapitata – has been identified. Based on measured dissolved barium concentrations in the water column, a 72h-ErC50 and 72h-NOEC of >1.15 and >=1.15 mg Ba/L, resp. is reported by Egeler and Kiefer (2010), using  BaCl2 dihydrated as test substance.

Key value for chemical safety assessment

Additional information

One reliable acute and chronic toxicity data point (Klimisch 1, GLP) for an algal species - the freshwater green algaPseudokirchneriella subcapitata- has been identified. No effect (growth rate) was noted at the highest (nominal) test concentration of 100 mg barium dichloride dihydrate/L.

Both the dissolved and total fration was measured. Dissolved levels were well below the theoretical expected levels, and this most likely due to formation the poorly soluble barium sulfate. At the highest nominal concentration of 100 mg Ba/L, the dissolved and total Ba concentration were 1.15 and 30.1 mg/L, respectively (geometric mean measured concentration). Therefore, based on total Ba-levels in solution, the ErC50 and NOEC are >30.1 and >=30.1 mg Ba/L, respectively. However, based on dissolved barium concentrations in solution, the ErC50 and NOEC are >1.15 and >=1.15 mg Ba/L, respectively.