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 for bioaccumulation

Additional information

The reference substance (BAGE) hydrolyses within less than an hour to its hydrolysis products: Boric acid and glycerol. Therefore, conducting a aquatic toxicity studies on the reference substance itself was considered not to be feasible.

Boric acid is considered to be the hydrolysis product of main concern and all aquatic toxicity study results (plus sediment and terrestrial data) are based on boric acid. The above PNEC justifications are therefore based on boric acid.

Aquatic PNECs.

Acute toxicity data in fish and Daphnia are not available on boric acid, so derivation of aquatic PNEC based on the results of three acute toxicity tests in different species is not applicable.

Acute toxicity of testing in algae showed some toxicity (3 day EC50 52.5 mg B/L; NOEC 17.5 mg B/L (100 mg/l boric acid)), but not at concentrations that would lead to classification.

A long-term fish study showed some toxicity (NOEC 5.6 mg B/L, statistical effects observed at concentration of 18 mg B/L and over), but not at concentrations that lead to classification.

Therefore, boric acid is not classified for the environment. In addition, there is very limited potential for environmental exposure. It is therefore considered unnecessary to derive aquatic PNECs and a qualitative assessment considered sufficient for environmental exposure.

Conclusion on classification

Boric acid is not classified for the environment according its current harmonised classification and available study data in this dossier.

The short-term algal EC50 of 52.5 mg B/L does not meet the criteria for classification (CLP) in Chronic Category 3, as the log Pow is <4 (-1.09) and a chronic toxicity NOEC (long-term fish study NOEC 5.6 mg B/L) is >1 mg/l.