Registration Dossier

Administrative data

Hazard for aquatic organisms

Freshwater

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

Marine water

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

STP

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

Sediment (freshwater)

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

Sediment (marine water)

Hazard assessment conclusion:
PNEC sediment (marine water)
PNEC value:
0.014 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:
0.024 mg/kg soil dw
Extrapolation method:
equilibrium partitioning method

Hazard for predators

Secondary poisoning

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

Additional information

Conclusion on classification

Classification related key information

Biodegradation in water: screening test: 90% (DOC) in 19 days (EU-Method C.4-B)

Log Kow: 3.23 (OECD 107)

Acute toxicity:

- to Fish: LC50 (96 h) = 6.82 mg/L (based on expert statement)

- to Crustacea: EC50 (48 h) = 46 mg/L for Daphnia magna (EU Directive 92/69/EWG)

- to Algae: ECr50 (72 h) = 45 mg/L for Scenedesmus subspicatus (EU Directive 92/69/EWG)

Chronic toxicity:

- to Fish: not available

- to Crustacea: not available

- to Algae: NOEC (72h) = 14 mg/L for Scenedesmus subspicatus (EU Directive 92/69/EWG)

 

Classification justification according to CLP

Based on the data above, 4-tert-butylcyclohexanol is considered rapidly biodegradable. The acute aquatic toxicity L(E)C50 is > 1 mg/L for fish, invertebrates and algae. Valid chronic toxicity data are available for the alga Scenedesmus subspicatus with a NOEC > 10 mg/L. 4-tert-butylcyclohexanol does not need to be classified according to the Regulation (EC) No. 1272/2008 (CLP) and the Regulation (EU) No. 286/2011 (2ndATP).