Registration Dossier

Administrative data

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:
PNEC aqua (freshwater)
PNEC value:
19.1 µg/L
Assessment factor:
1 000
Extrapolation method:
assessment factor
PNEC freshwater (intermittent releases):
191 µg/L

Marine water

Hazard assessment conclusion:
PNEC aqua (marine water)
PNEC value:
1.91 µg/L
Assessment factor:
10 000
Extrapolation method:
assessment factor

STP

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

Sediment (freshwater)

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

Sediment (marine water)

Hazard assessment conclusion:
PNEC sediment (marine water)
PNEC value:
0.013 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:
0.015 mg/kg soil dw
Extrapolation method:
equilibrium partitioning method

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
no potential for bioaccumulation

Additional information

The substance NBDI (an aliphatic diisocyanate) reacts with water. From this reaction, the diamine NBDA is formed and CO2. Available data about the conversion rate of NBDI to NBDA in water: after 3 hours a conversion rate of 60-85% was shown (depending on the initial concentration). It has been shown, in the environmental studies, that NBDA is hydrolytically stable and that the parent compound (NBDI) is not. Based on this information (e.g. half-life NBDI less than 12 hours), it is considered justified to conclude that the CSA for the environment needs to based on NBDA. All the here reported PNECs are therefore PNECs for NBDA (NBDI is not present in the environment).

Conclusion on classification

The substance is classified as hazardous to the environment (chronic env. tox. Category 3).

Note: harmonized classification, see Annex VI of Regulation No. 1272/2008.