Registration Dossier

Administrative data

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:
no data: aquatic toxicity unlikely

Marine water

Hazard assessment conclusion:
no data: aquatic toxicity unlikely

STP

Hazard assessment conclusion:
no data: aquatic toxicity unlikely

Sediment (freshwater)

Hazard assessment conclusion:
no exposure of sediment expected

Sediment (marine water)

Hazard assessment conclusion:
no exposure of sediment expected

Hazard for air

Hazard for terrestrial organisms

Soil

Hazard assessment conclusion:
no exposure of soil expected

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
insufficient hazard data available (further information necessary)

Additional information

Since the studies on freshwater organisms (i. e. fish, daphnids and algae) indicate that sodium hypophosphite is not considered as hazardous to the aquatic environment (LC50/EC50 > 100 mg/L), no PNEC values are calculated for the freshwater compartment nor for the marine compartment In a same way no toxicity was obtained in a study using activated sludge (EC50 > 1000 mg/L). All these studies show that aquatic toxicity as a result from sodium hypophosphite is unlikely, thus no PNEC values for PNECaqua(freshwater), PNECaqua(marine waters) and PNECSTPwere calculated. Furthermore, no PNECsedimentand PNECsoilare calculated as no exposure to soil is expected. Finally, PNECoralcould not be derived as no data was available.

Conclusion on classification

According to the CLP regulation (EC) n° 1272/2008 and the EU directive 67/548/EEC:

Short-term toxicity to fish: not classified (LC50 (96h) > 100 mg/L)

Short-term toxicity to aquatic invertebrates: not classified (EC50Daphnia (48h) > 100 mg/L)

Toxicity to aquatic algae: not classified (EC50 (72h) for growth rate and yield >100 mg/L)

Based on these results, no classification concerning hazardous to the aquatic environment has to be applied for sodium hypophosphite according to both the CLP regulation (EC) n° 1272/2008 and the EU directive 67/548/EEC.