Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Administrative data

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:
PNEC aqua (freshwater)
PNEC value:
0.22 mg/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:
0.022 mg/L
Assessment factor:
500
Extrapolation method:
assessment factor
PNEC marine water (intermittent releases):
0.1 mg/L

STP

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

Sediment (freshwater)

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

Sediment (marine water)

Hazard assessment conclusion:
PNEC sediment (marine water)
PNEC value:
0.089 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:
10 mg/kg soil dw
Assessment factor:
50
Extrapolation method:
assessment factor

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
no potential for bioaccumulation

Additional information

Conclusion on classification

Justification for classification

Brief description of the data relevant for classification

Degradation

Biodegradation: not readily biodegradable: -33.7% based on DOC removal (OECD 301 A), but degradable in soil with a half-life of 1.5 - 3.3 d

Bioaccumulation

Partition coefficient: log Pow < -2.2 at 21 °C, pH = 6

Aquatic acute toxicity

For fish (Oncorhynchus mykiss): LC50 (96 h) > 100 mg/L

For aquatic invertebrates (Daphnia magna): EC50 (48 h) > 100 mg/L

For algae/aquatic plants (Pseudokirchneriella subcapitata): EC50 (72 h) > 100 mg/L

Aquatic chronic toxicity

For fish: no data available

For aquatic invertebrates (Daphnia magna): NOEC (21 d) 11.1 mg/L

For algae/aquatic plant (Pseudokirchneriella subcapitata): NOEC (72 h) >= 100 mg/L

 

Conclusion on classification

CLP:

The acute aquatic toxicity L(E)C50 values are > 100 mg/L for fish, invertebrates and algae. Therefore, Reaction mass of 2-(3,4-dimethyl-1H-pyrazol-1-yl)succinic acid and 2-(4,5-dimethyl-1H-pyrazol-1-yl)succinic acid does not meet the criteria for classification and labelling as acute aquatic hazard the consolidated version of the Regulation (EC) No. 1272/2008 (CLP).

Valid chronic toxicity data are available for algae and invertebrates. The NOEC values are clearly above 1 mg/L. Therefore, Reaction mass of 2-(3,4-dimethyl-1H-pyrazol-1-yl)succinic acid and 2-(4,5-dimethyl-1H-pyrazol-1-yl)succinic acid does not meet the criteria for classification and labelling as long-term aquatic hazard according to the consolidated version of the Regulation (EC) No. 1272/2008 (CLP).