Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Freshwater

Hazard assessment conclusion:
PNEC aqua (freshwater)
PNEC value:
1 mg/L
Assessment factor:
10
Extrapolation method:
assessment factor
PNEC freshwater (intermittent releases):
1 mg/L

Marine water

Hazard assessment conclusion:
PNEC aqua (marine water)
PNEC value:
0.1 mg/L
Assessment factor:
100
Extrapolation method:
assessment factor
PNEC marine water (intermittent releases):
0.1 mg/L

STP

Hazard assessment conclusion:
PNEC STP
PNEC value:
100 mg/L
Assessment factor:
100
Extrapolation method:
assessment factor

Sediment (freshwater)

Hazard assessment conclusion:
PNEC sediment (freshwater)
PNEC value:
42 700 mg/kg sediment dw
Extrapolation method:
equilibrium partitioning method

Sediment (marine water)

Hazard assessment conclusion:
PNEC sediment (marine water)
PNEC value:
4 270 mg/kg sediment dw
Extrapolation method:
equilibrium partitioning method

Hazard for air

Air

Hazard assessment conclusion:
no hazard identified

Hazard for terrestrial organisms

Soil

Hazard assessment conclusion:
PNEC soil
PNEC value:
8 540 mg/kg soil dw
Extrapolation method:
equilibrium partitioning method

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
no potential for bioaccumulation

Additional information

Borate esters are present as components of the UVCB substance. However, the UVCB as a whole is hydrophobic and insoluble (water solubility < 0.17 mg/L at 20 °C and pH 4.4). As a result, borate esters will not be present in solution at environmentally relevant temperature and pH, and hydrolysis of these components is not expected. Moreover, boric acid has no mechanism of action relating to endocrine disruption, and the UVCB substance as a whole is not classified as hazardous to the environment. It is therefore concluded that environmental exposure to the test item presents no cause for concern.

Conclusion on classification

The substance is not classified for the environment. The substance does not fulfil the criteria required for classification as either an acute or chronic aquatic hazard.

There are three short term LL50 values representing the three trophic levels. No acute toxicity is observed, the LL50 values are therefore > 100 mg/L and the NOEC is set at 100 mg/L. In addition there are two long-term NOEC values, the 72-h NOEC for algae of > 100 mg/L and a 21-day Daphnia NOEL = 10 mg/L.

The substance is not readily biodegradable but the Log Kow is > 9.4 and in accordance with ECHA Guidance on Information requirements and chemical safety assessment Chapter R11: PBT assessment on determination of bioaccumulation potential states: The aquatic BCF of a substance is probably lower than 2000 L/kg if the calculated log Kow is higher than 10. EPIWIN QSAR calculations of BCF on the components show that the majority of the substance has a BCF < 500 L/kg. Therefore classification is not required.

Borate esters are present as components of the UVCB substance. However, the UVCB as a whole is hydrophobic and insoluble (water solubility < 0.17 mg/L at 20 °C and pH 4.4). As a result, borate esters will not be present in solution at environmentally relevant temperature and pH, and hydrolysis of these components is not expected. Moreover, boric acid has no mechanism of action relating to endocrine disruption, and the UVCB substance as a whole is not classified as hazardous to the environment. It is therefore concluded that environmental exposure to the test item presents no cause for concern.