Registration Dossier

Administrative data

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:
PNEC aqua (freshwater)
PNEC value:
0.008 mg/L
Assessment factor:
50
Extrapolation method:
assessment factor
PNEC freshwater (intermittent releases):
0.016 mg/L

Marine water

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

STP

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

Sediment (freshwater)

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

Sediment (marine water)

Hazard assessment conclusion:
PNEC sediment (marine water)
PNEC value:
0.058 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:
0.112 mg/kg soil dw
Extrapolation method:
equilibrium partitioning method

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
no potential for bioaccumulation

Additional information

Conclusion on classification

Aquatic environment classification

Alpha-methylstyrene proved to be not readily biodegradable (54 % biodegradation after 28 days). However, in-depth evaluation of the biodegradation study results lead to the conclusion that the test substance is rapidly biodegraded in standard test systems.

The lowest acute EC/LC50 value in aquatic tests is the EC50 of 1.645 mg/L for Daphnia magna.

The lowest reliable long-tern effect value in aquatic studies is the 21 d NOEC of 0.401 mg/l for Daphnia magna.

Basic data for classification:

Lowest reliable acute L(EC)50 value:       1.645 mg/L for Daphnia magna

Lowest reliable long-term NOEC value:    0.401 mg/L for Daphnia magna

Ready biodegradable                                no, but rapidly biodegradable

log Pow                                                    < 4

Special concern:                                        no

 

Legal classification according

to 67/548/EEC Annex 1:                       dangerous for the environment: N, R51/53

Legal classification according to Commission Regulation (EU) No 286-2011 of 11 March 2011 amending, for the purposes of its adaptation to technical and scientific progress, Regulation (EC) No 1272/2008:

Classification:   Aquatic Chronic 2 (H411)

Labelling:         Signal word: Warning; Pictogram for environmental hazards: GHS09

                                                               Reason for classification:     NOEC: 0.1 – 1 mg/L; not readily biodegradable

Self-classification according toCommission Regulation (EU) No 286-2011 of 11 March 2011 amending, for the purposes of its adaptation to technical and scientific progress, Regulation (EC) No 1272/2008:

Classification:   Aquatic Chronic 3 (H412)

Labelling:          no pictogram, no signal word

                                                                Reason for classification:     NOEC: 0.1 – 1 mg/L; rapidily biodegradable

Hazard to the atmospheric environment:

(Hazardous to the ozone layer: This includes substances which are listed in Annex I to Regulation (EC) No 2037/2000 of the European Parliament and of the Council ofon substances that deplete the ozone layer (1) and its subsequent amendments):

alpha-methylstyrene is not listed in Annex I of (EC) No 2037/2000.

M-Factor:                                       No