Registration Dossier

Administrative data

Hazard for aquatic organisms

Freshwater

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

Marine water

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

STP

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

Sediment (freshwater)

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

Sediment (marine water)

Hazard assessment conclusion:
PNEC sediment (marine water)
PNEC value:
0.592 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:
0.901 mg/kg soil dw
Extrapolation method:
equilibrium partitioning method

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
no potential for bioaccumulation

Additional information

PNECs are based on the following data for the test substance:

Test type

Results

Microorganisms, activated sludge

3h-EC50respiration: >246.4 mg a.i./l

Short-term studies

 

Daphnia magna

48h-EC50: >400 mg a.i./l

Oncorhynchus mykiss

96h-LC50: >100 mg a.i./l

Chlorella vulgaris

72h-ErC50: >400 mg a.i./l

Chronic studies  

Pseudokirchneriella subcapitata

72h-NOErC: > 46.2 mg a.i./l
Daphnia magna 21d-NOEC reproduction: > 24.06 mg a.i./l

No tests were performed with sediment organisms or terrestrial organisms. The PNECs for those compartments were derived using the equilibrium partitioning theory and log Koc. All relevant substance characteristics were entered into EUSES version 2.1.2 to produce PNECsediment for the freshwater and marine compartment as well as PNECsoil.

Conclusion on classification

The sodium and potassium salts are considered to have the same environmental effect and read-across is fully valid. All data relate to the sodium salt.

The substance is not classified as hazardous to the aquatic environment.

Acute (short-term) aquatic hazard

Acute toxicity (E(L)C50 values) data for fish, crustacea and algae are all >1 mg/l. Therefore the substance needs no classification with Category Acute 1.

Long-term aquatic hazard

Acute toxicity data (E(L)C50 values) are available for fish, crustacea and algae and are > 10 mg/l. Reliable chronic toxicity data are available for crustacea and algae with chronic NOEC values >1 mg/l. In addition the substance is readily biodegradable and the bioaccumulation potential of the substance is low given the log Kow of 1.53. As the chronic toxicity is > 1 mg/l, the substance does not meet the criteria for classification with Categories Chronic 1, 2 or 3.

Safety net classification

The safety net classification does not apply. The substance is readily biodegradable and the low log Kow suggests a lack of bioaccumulation potential. In addition all chronic NOEC values are >1 mg/l. Therefore the substance needs no classification as Chronic Category 4.

Conclusion classification according to CLP Regulation 1272/2008

Based on the results of the acute aquatic toxicity (values > 10 mg/L) and the chronic aquatic toxicity (values > 10 mg/L) and since the substance has a low bioaccumulation potential and is rapidly biodegradable, the substance is not classified as hazardous to the environment according to Regulation 1272/2008.  

Classification according to 67/548/EEC (DSD)

Acute aquatic toxicity is > 1 mg/l and the substance is rapidly biodegradable and has a low bioaccumulation potential (log Kow of -0.12). Therefore the substance is not classified as dangerous for the environment according to Directive 67/548/EEC.