Registration Dossier

Administrative data

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:
PNEC aqua (freshwater)
PNEC value:
2.2 µg/L
Assessment factor:
10
Extrapolation method:
assessment factor
PNEC freshwater (intermittent releases):
6.1 µg/L

Marine water

Hazard assessment conclusion:
PNEC aqua (marine water)
PNEC value:
0.22 µg/L
Assessment factor:
100
Extrapolation method:
assessment factor

STP

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

Sediment (freshwater)

Hazard assessment conclusion:
PNEC sediment (freshwater)
PNEC value:
1.72 mg/kg sediment dw
Assessment factor:
10
Extrapolation method:
assessment factor

Sediment (marine water)

Hazard assessment conclusion:
PNEC sediment (marine water)
PNEC value:
0.345 mg/kg sediment dw
Assessment factor:
50
Extrapolation method:
assessment factor

Hazard for air

Air

Hazard assessment conclusion:
no hazard identified

Hazard for terrestrial organisms

Soil

Hazard assessment conclusion:
PNEC soil
PNEC value:
0.01 mg/kg soil dw
Assessment factor:
10
Extrapolation method:
assessment factor

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
PNEC oral
PNEC value:
1.1 mg/kg food
Assessment factor:
90

Additional information

Conclusion on classification

Lowest values for short-term toxicity data per taxon:

Species

Result (mg/l)

Algae: Pseudokirchneriella subcapitata

72h-ECr50 > 0.835

Invertebrates: Nitocra spinipes

96h-LC50 = 0.61

Fish: Lepomis macrochirus

4d-LC50 = 1.49

AHTN has log Kow 5.4 and is not readily biodegradable. Acute toxicity studies are available for the three trophic levels. The lowest value is 0.61 mg/l. Therefore, AHTN is classified for its acute (short-term) Aquatic Hazard Category Acute 1, M-factor: 1 in accordance with CLP Regulation (EC) No 1271/2008.

Lowest values for long-term toxicity data per taxon:

Species

Result (mg/l)

Algae: Pseudokirchneriella subcapitata

72h-ECr50 > 0.835 72h-NOECr = 0.40

Invertebrates

 

Acartia tonsa (marine)

6d-EC10(larval dev. ratio) = 0.028, NOEC = 0.022

Daphnia magna

21d-NOECrepr = 0.196

Fish

 

Pimephales promelas

36d-NOEC = 0.035

Brachydanio rerio

34d-NOEC = 0.035

AHTN is classified for its chronic toxicity based on the lowest NOEC of 0.022 mg/l as Aquatic Hazard Category Chronic 1 with M-factor 1 (0.01 < NOEC ≤ 0.1 mg/l and not readily biodegradable in accordance with CLP Regulation (EC) No 1271/2008.