Registration Dossier

Data platform availability banner - registered substances factsheets

Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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:
0.144 mg/L
Assessment factor:
50
Extrapolation method:
assessment factor
PNEC freshwater (intermittent releases):
0.36 mg/L

Marine water

Hazard assessment conclusion:
PNEC aqua (marine water)
PNEC value:
0.014 mg/L
Assessment factor:
500
Extrapolation method:
assessment factor

STP

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

Sediment (freshwater)

Hazard assessment conclusion:
PNEC sediment (freshwater)
PNEC value:
15 mg/kg sediment dw
Assessment factor:
1
Extrapolation method:
equilibrium partitioning method

Sediment (marine water)

Hazard assessment conclusion:
PNEC sediment (marine water)
PNEC value:
1.5 mg/kg sediment dw
Assessment factor:
1
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:
2.94 mg/kg soil dw
Assessment factor:
1
Extrapolation method:
equilibrium partitioning method

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
no potential to cause toxic effects if accumulated (in higher organisms) via the food chain

Additional information

Conclusion on classification

CLP: Chronic 3;  

GHS: Acute 3 and Chronic 3

 

EXPLANATIONS

1.    Acute classification

The existing acute data are as follows:

·        72 h EC50 algae = 36 mg/L; 48 h EC50 Daphnia = 73.1 mg/L, 96 hr Acute fish = 171 mg/L (algae used as worst case).

·     

CLP: As all effect values are above 1 mg/L,there is no acute classification for this substance.

GHS: As EC50 value is between 10 and 100 mg/L, Acute 3 is applicable in this case.

 

2.    Chronic classification

Di-tert butyl peroxide is not readily biodegradable, and the measured log Kow is 3.2. The chronic data available are as follows:

72 h ErC10 algae, 15 mg/L; 21 d NOEC Daphnia = 7.2 mg/L.

When chronic data for less than 3 trophic levels are available the classification is assessed using both the existing chronic and acute data, and the most stringent outcome is chosen.

Based on acute data (72 h EC50 algae = 36 mg/L): Chronic 3 

Based on chronic data: (72 h ErC10 algae, 7.2 mg/L): No classification

CLP and GHS: Most stringent outcome:Chronic 3