Registration Dossier

Administrative data

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:
PNEC aqua (freshwater)
PNEC value:
0.004 mg/L
Assessment factor:
10
PNEC freshwater (intermittent releases):
0.001 mg/L

Marine water

Hazard assessment conclusion:
PNEC aqua (marine water)
PNEC value:
0 mg/L
Assessment factor:
100

STP

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

Sediment (freshwater)

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

Sediment (marine water)

Hazard assessment conclusion:
PNEC sediment (marine water)
PNEC value:
0.002 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:
0.019 mg/kg soil dw
Assessment factor:
10
Extrapolation method:
assessment factor

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
no potential for bioaccumulation

Additional information

Conclusion on classification

The data relevant for classification is summarised below. For the acute and chronic classification, a M-factor of 1 has to be applied.

Endpoint

Classification criteria CLP (Regulation 1272/2008/EC)

Relevant data for Glufosinate-ammonium

Degradation

not rapidly degradable

 not rapidly degradable

-t1/2biodegradation in surface water:
DT50 = 54.3 days

- t1/2biodegradation in soil: DT50 = 6.5 days

- t1/2(hydrolysis): stable

- t1/2(photolysis):stable

Bioaccumulation

log Kow >4

and/or

experimentally determined BCF ≥ 500

log Kow <1 (pH 5, 7 and 9)

Not bioaccumulative

BCF <1 (Lepomis macrochirus; measured)

Acute aquatic toxicity

Category Acute 1:

L(E)C50 ≤ 1 mg/L

Lowest relevant acute aquatic endpoint:

ErC50 (72 h) = 0.132 mg a.s./L (nominal concentration) for Anabaena flos-aquae

Chronic aquatic toxicity for not rapidly degradable substances

Category Chronic 1 (not rapidly degradable): NOEC or ECx ≤

0.1 mg/L

Lowest relevant chronic aquatic endpoint:

NOEC (72 h): 0.039 mg a.s./L (nominal concentration) forAnabaena flos-aquae