Registration Dossier

Administrative data

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:
no hazard identified

Marine water

Hazard assessment conclusion:
no hazard identified

STP

Hazard assessment conclusion:
no hazard identified

Sediment (freshwater)

Hazard assessment conclusion:
no hazard identified

Sediment (marine water)

Hazard assessment conclusion:
no hazard identified

Hazard for air

Air

Hazard assessment conclusion:
no hazard identified

Hazard for terrestrial organisms

Soil

Hazard assessment conclusion:
no hazard identified

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
no potential to cause toxic effects if accumulated (in higher organisms) via the food chain

Additional information

Conclusion on classification

In a short term toxicity study to invertebrates with the target substance 2-butyloctanoic acid, the 48hEC50 to Daphnia magna was found to be 31 mg/l (95% confidence interval between 22 and 42 mg/l). The short-term toxicity of the source substance Reaction mass of n-undecanoic-acid and 2-methyl-decanoicacid and 2-ethyl-nonanoic-acid and 2-propyl-octanoic-acid and 2-butyl-heptanoic-acid was assessed in two main trophic levels of fresh water organisms (invertebrates and algae). For Daphnia, a 48h-EC50 of 16 mg/l (95% confidence interval between 13 and 19 mg/l) was obtained. In a study with a fresh water algae, the source substance Reaction mass of n-undecanoic-acid and 2-methyl-decanoic-acid and 2-ethyl-nonanoic-acid and 2-propyl-octanoic-acid and 2-butyl-heptanoic-acid inhibited growth rate and yield significantly at a time weighted average concentration of 4.2 mg/L and higher, resulting in an NOErC (72h) of 1.3 mg/L. The EC50 for growth rate inhibition (72h-ErC50) was 13 mg/L (95% confidence interval ranging from 11 to 15 mg/l). The estimated ErC10 (72h) was 2.7 mg/L (95% confidence interval between 2.0 and 3.5 mg/l).

The source substance 2 -decyltetradecanoic acid showed no toxicity in the range of water solubility.  

For the target substance 2 -butyloctanoic acid the ECOSAR calculated NOEC for fishes and daphnia were 1.184 mg/L and 1.175 mg/L, respectively.  

The target substance 2 -butyloctanoic acid is readily biodgradable.  Taken all those results into account the target substance is not classified for the environment.