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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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:
0.199 µg/L
Assessment factor:
1 000
Extrapolation method:
assessment factor
PNEC freshwater (intermittent releases):
1.99 µg/L

Marine water

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

STP

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

Sediment (freshwater)

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

Sediment (marine water)

Hazard assessment conclusion:
PNEC sediment (marine water)
PNEC value:
0.046 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:
0.054 mg/kg soil dw
Extrapolation method:
equilibrium partitioning method

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
PNEC oral
PNEC value:
16.67 mg/kg food
Assessment factor:
30

Additional information

Long term toxicity to fish study according to GLP-standards and OECD guideline 210. The NOEC of BHT in Oryzias latipes was 0.053 mg/L and the LOEC was 0.14 mg/L.

Long term toxicity to aquatic invertebrates according to OECD guideline 211 and GLP standards. The 21 -day NOEC of BHT in Daphnia Magna was 0.069 mg/L and the 21 -day EC50 was 0.096 mg/L.

Conclusion on classification

Based on the available ecotoxicological information:

Short-term toxicity to fish: The estimated 96-h LC50 for fish is 0.199 mg/l (ECOSAR v1.00a, phenols class).

Short-term toxicity to aquatic invertebrates: The 48-Hour EC50 based on the geometric mean measured test concentrations was 0.48 mg/L with 95% confidence limits of 0.39 - 0.70 mg/L and the No Observed Effect Concentration was 0.15 mg/L.

Toxicity to aquatic algae: The estimated 96-h EC50 for green algae is 0.758 mg/l (ECOSAR v1.00a, phenols class).

Since the values are below 1 mg/L and the substance is considered as not readily biodegradable and has a log Pow greater than 4, the substance is classified as follows:

Hazardous to the aquatic environment, Chronic Hazard Category 1 and Acute Hazard Category 1 (M-factor 1).