Aluminium potassium bis(sulphate)

Short-term toxicity to aquatic invertebrates

Description of key information

The first Key study from Anderson gave a NOEC-16h of 206 mg/L aluminium potassium bis(sulphate) for Daphnia magna as species. The EC50/LC50 should be much higher. The chosen EC50/LC50 is 206 mg/L aluminium potassium bis(sulphate). The first supporting study from Abraham et al. gave no mortality in the range of EC0-2h 0.05-2.00 mg/L as Al. Calculated for Aluminium potassium bis(sulphate): EC0-2h : 0.48-19.12 mg/L for Aspidisca cicada. The second supporting study from Khangarot et al. with Daphnia magna as species and aluminium ammonium bis(sulphate) as read across substance gave an EC50-48h for Aluminium ammonium bis(sulphate) Immobilisation Daphnia magna: 59.60 (45.80-73.31) mg/L as Al. Calculated EC50-48h Aluminium potassium bis(sulphate) Immobilisation Daphnia magna: 571 mg/L as Aluminium potassium bis(sulphate). The third supporting study from Belabed et al. with aluminium sulphate as read across substance and dissociation product of aluminium potassium bis(sulphate) gave an IC50-48h Daphnia magna of 8.00 mg/L Al. IC50-48h calculated for aluminium potassium bis(sulphate): 76.56 mg/L aluminium potassium bis(sulphate). The 4th and 5th supporting study from Mount et al. with potassium sulphate as read across substance from dissociation of aluminium potassium bis(sulphate) gave an LC50-48h Daphnia magna: 720 (580-880) mg/L as SO4-ion. Calculated for potassium sulphate LC50-48h: 1307 mg/L as potassium sulphate. The second Key study from Lamb et al.:EC50-96h: 60-724 mg/L Aluminium potassium bis(sulphate). In the supporting studies by Shuhaimi-Othman et al. (published 2011 and 2013), different species commonly found in Malaysian waterbodies were exposed to aluminium sulphate for 96 hours. Obtained LC50/EC50 correspond to a wide range from ca. 14 mg/l (Chironomus javanus) to ca. 650 mg/l (Melanoides tuberculata) aluminium potassium bis(sulphate). In the supporting study by DeForest et al. (published 2018), experimental data on the toxicity (EC10/EC20) of aluminium to Ceriodaphnia dubia is summarized. The results illustrate the influence of the water characteristics (dissolved organic carbon, pH, hardness) on the toxicity. Probable cause are alterations in the bioavailability with changing water characteristics. Results of Key studies show that the EC50/LC50-values are above 100 mg/L. The NOEC-16h Daphnia magna is 206 mg/L for aluminium potassium bis(sulphate). The corresponding EC50/LC50 should be higher than 206 mg/L. The chosen EC50/LC50 value is 206 mg/L. Therefore the substance is not classified for short-term toxicity to aquatic invertebrates according CLP criteria.

Key value for chemical safety assessment

Fresh water invertebrates

Fresh water invertebrates

Effect concentration:

206 mg/L

Additional information

Results of Key studies show that the EC50/LC50-values are above 100 mg/L.

The NOEC-16h Daphnia magna is 206 mg/L for aluminium potassium bis(sulphate).

The corresponding EC50/LC50 should be higher than 206 mg/L.

The chosen EC50/LC50 value is 206 mg/L.

Therefore the substance is not classified for short-term toxicity to aquatic invertebrates according CLP criteria.