tert-butyl peracetate

Ecotoxicological Summary

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:

PNEC aqua (freshwater)

PNEC value:

0.004 mg/L

Assessment factor:

1 000

Extrapolation method:

assessment factor

PNEC freshwater (intermittent releases):

0.04 mg/L

Marine water

Hazard assessment conclusion:

PNEC aqua (marine water)

PNEC value:

0 mg/L

Assessment factor:

10 000

Extrapolation method:

assessment factor

PNEC marine water (intermittent releases):

0.04 mg/L

STP

Hazard assessment conclusion:

PNEC STP

PNEC value:

6.4 mg/L

Assessment factor:

10

Extrapolation method:

assessment factor

Sediment (freshwater)

Hazard assessment conclusion:

PNEC sediment (freshwater)

PNEC value:

0.03 mg/kg sediment dw

Extrapolation method:

equilibrium partitioning method

Sediment (marine water)

Hazard assessment conclusion:

PNEC sediment (marine water)

PNEC value:

0.003 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:

0.004 mg/kg soil dw

Extrapolation method:

equilibrium partitioning method

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:

no potential for bioaccumulation

Additional information

The PNEC derivation was as follows justified:

 

PNEC freshwater sediment:

K_(susp-water) = 1.85

RHO_(susp) = 1150

Conversion factor (wwt -> dwt): 4.6

PNEC_freshwater sediment

= (K_(susp-water)/ RHO_(susp))*PNEC_water * 1000

= (1.85/1150)*0.004*1000

= 0.0064 mg/kg wwt

= 0.03 mg/kg dw

 

PNEC marine water sediment:

K_(susp-water) = 1.85

RHO_(susp) = 1150

Conversion factor (wwt -> dwt): 4.6

PNEC_marine water sediment

= (K_(susp-water)/ RHO_(susp))*PNEC_marine water* 1000

= (1.85/1150)* 0.0004 * 1000

= 0.00064 mg/kg wwt

= 0.003 mg/kg dw

 

 

PNEC soil:

K_(soil-water) = 1.35

RHO_(soil) = 1700

Conversion factor (wwt -> dwt): 1.13

PNEC_soil

= (K_(soil-water)/ RHO_(soil))*PNEC_water* 1000

= (1.35/1700)* 0.004 * 1000

= 0.0032 mg/kg wwt

= 0.0036 mg/kg dw

Conclusion on classification

Aquatic acute toxicity

96 h, LC50 (Danio rerio): 39.6 mg/L (geometric mean measured concentration)

48 h, EC50 (Daphnia magna): 4.31 mg/L (geometric mean measured concentration)

72 h, ErC50 (Pseudokirchneriella subcapitata): 6.4 mg/L (geometric mean measured concentration)

 

Aquatic chronic toxicity

72 h, EC10 (Pseudokirchneriella subcapitata): 2.6 mg/L (geometric mean measured concentration)

 

Biodegradation: not biodegradable: 4 % after 28 days (% degradation O2 consumption, OECD 301 D)

Partition coefficient: log Kow = 1.6  at 25 °C, log Koc = 1.5 at 25 °C

 

Classification according to CLP

The available experimental test data are reliable and suitable for classification purposes under Regulation (EC) No 1272/2008. The test substance was found to be not biodegradable under the test conditions. The most sensitive test for the aquatic compartment was the toxicity test to aquatic invertebrates. This study revealed a 48-h EC50 of 4.31 mg/L. Based on this data, the substance has not to be classified with regard to acute (short-term) environmental toxicity according to Regulation (EC) No 1272/2008 (CLP), as amended for the eighteenth time in Regulation (EU) 2022/692, but the substance is classified as acute (short-term) aquatic cat. 2 according to GHS Rev. 9 (2021).

For the long-term toxicity test of algae an EC10 value of 2.6 mg/L was determined. As the test item is not readily biodegradable, the substance is therefore classified as chronic (long-term) aquatic cat. 2 (H411: Toxic to aquatic life with long lasting effects) according to Regulation (EC) No 1272/2008 (CLP/GHS), as amended for the eighteenth time in Regulation (EU) 2022/692.