Registration Dossier

Administrative data

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:
PNEC aqua (freshwater)
PNEC value:
0.016 mg/L
Assessment factor:
1 000
Extrapolation method:
assessment factor
PNEC freshwater (intermittent releases):
0.16 mg/L

Marine water

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

STP

Hazard assessment conclusion:
PNEC STP
PNEC value:
0.15 mg/L
Assessment factor:
10
Extrapolation method:
assessment factor

Sediment (freshwater)

Hazard assessment conclusion:
PNEC sediment (freshwater)
PNEC value:
0.172 mg/kg sediment dw
Extrapolation method:
sensitivity distribution

Sediment (marine water)

Hazard assessment conclusion:
PNEC sediment (marine water)
PNEC value:
0.017 mg/kg sediment dw

Hazard for air

Air

Hazard assessment conclusion:
no hazard identified

Hazard for terrestrial organisms

Soil

Hazard assessment conclusion:
PNEC soil
PNEC value:
0.025 mg/kg soil dw
Extrapolation method:
sensitivity distribution

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
PNEC oral
PNEC value:
26.7 mg/kg food
Assessment factor:
300

Additional information

Conclusion on classification

Although tertiary butyl acetate is acutely toxic to algae (72h ErC 16 mg/l), the results for the fish and Daphnia acute toxicity tests ( 96h LC50 240mg/l and 48h EC50 350 mg/l, respectively) suggests that algae is particularly sensitive to tertiary butyl acetate. Considering the results of the algal inhibition test and that tertiary butyl acetate is not readily biodegradability suggest potential for chronic toxicity at this trophic level, however, as a chronic NOEC of >1 mg/l was observed in the algal inhibition test (96h NOEC = 2.3 mg/l), a chronic classification is not warranted, therefore the classification of tertiary butyl acetate is concluded to be:

- not classifiable under Regulation 1272/2008 (CLP GHS) criteria.

- under UN GHS criteria, hazardous to the aquatic environment, acute category 3.