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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Administrative data

Hazard for aquatic organisms

Hazard for air

Hazard for terrestrial organisms

Hazard for predators

Additional information

Conclusion on classification

Two studies are available on dipotassium malonate: an acute daphnia study in accordance with OECD 202 and an algae study in accordance with OECD 201. These tests yielded the following results:

- daphnia 48h EC50 > 100 mg/L (nominal concentration)

- algae 72h EC50 (growth rate) > 5.75 mg/L (measured, geometric mean)

The algae EC10 was not determined because the observed inhibition was below 20% for growth rate and below 50% for yield, and there was no concentration response relation observed. The NOEC was found to be 2.06 mg/L (measured, geometric mean).

Based on the criteria described in CLP section 4.1.2, classification for acute aquatic hazard is not required as the available EC50 values are > 1 mg/L.

With regard to long-term aquatic hazard, the classification needs to be determined in two ways, and the most stringent outcome to be retained:

i) based on the available chronic data for algae. As the EC10 is not determined, the NOEC of 2.06 mg/L (measured, geometric mean) is used as the starting point. Taking into account that the substance is readily biodegradable, dipotassium malonate does not need to be classified for long-term aquatic hazard.

ii) based on the available acute data. Based on the algae EC50 of > 5.75 mg/L (measured, geometric mean), and taking into account that the substance is readily biodegradable and has a log Kow < 4, classification for long-term aquatic hazard is not warranted.

In conclusion, classificaiton for environmental toxicity is not required.