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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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:
0.17 mg/L
Assessment factor:
1 000
Extrapolation method:
assessment factor
PNEC freshwater (intermittent releases):
1.7 mg/L

Marine water

Hazard assessment conclusion:
PNEC aqua (marine water)
PNEC value:
0.017 mg/L
Assessment factor:
10 000
Extrapolation method:
assessment factor

STP

Hazard assessment conclusion:
PNEC STP
PNEC value:
419 mg/L
Assessment factor:
1
Extrapolation method:
assessment factor

Sediment (freshwater)

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

Sediment (marine water)

Hazard assessment conclusion:
PNEC sediment (marine water)
PNEC value:
0.062 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:
0.024 mg/kg soil dw
Extrapolation method:
equilibrium partitioning method

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
no potential for bioaccumulation

Additional information

PNEC freshwater sediment:
K_(susp-water) = 0.91
RHO_(susp) = 1150
Conversion factor (wwt -> dwt): 4.6
PNEC_freshwater sediment = (K_susp-water)/RHO_(susp))*PNEC_freshwater*1000
= (0.91/1150) * 0.17 * 1000
= 0.13 mg/kg wwt
= 0.62 mg/kg dwt
 
The PNEC (sediment-freshwater) of dry weight (dw) of potassium N,N-dimethylglycinate is 0.62 mg/kg corresponding to the wet weight (ww) value of 0.13 mg/kg (conversion factor: 4.6).

PNEC marine sediment:
K_(susp-water) = 0.91
RHO_(susp) = 1150
Conversion factor (wwt -> dwt): 4.6
PNEC_freshwater sediment = (K_susp-water)/RHO_(susp))*PNEC_marine water*1000
= (0.91/1150) * 0.017 * 1000
= 0.013 mg/kg wwt
= 0.062 mg/kg dwt
 
The PNEC (sediment-saltwater) of dry weight (dw) of potassium N,N-dimethylglycinate is 0.062 mg/kg corresponding to the wet weight (ww) value of 0.013 mg/kg (conversion factor: 4.6).

PNEC soil:
K_(soil-water) = 0.212
RHO_(soil) = 1700
Conversion factor (wwt ->dwt): 1.13
PNEC_soil = (K_(soil-water)/RHO_(soil))*PNEC_freshwater * 1000
= (0.212/1700) * 0.17 * 1000
= 0.0212 mg/kg wwt
= 0.024 mg/kg dwt
 
The PNEC (soil) of dry weight (dw) of potassium N,N-dimethylglycinate is 0.024 mg/kg corresponding to the wet weight (ww) value of 0.0212 mg/kg (conversion factor: 1.3).

Conclusion on classification

Acute aquatic toxicity:

All environmental toxicity data from algae, daphnia and fish revealed a LC/EC50 well above the threshold for classification (> 1 mg/L). Based on the acute aquatic toxicity results obtained, potassium N,N-dimethylglycinate is not considered to be classified and labelled for acute aquatic toxicity according to Regulation (EC) No 1272/2008 (CLP).

Chronic aquatic toxicity:

A toxicity test in the green algae revealed an EC50 (72 h) of 170 mg/L. Thus, potassium N,N-dimethylglycinate is not considered to be classified and labelled for chronic aquatic toxicity according to Regulation (EC) No 1272/2008 (CLP).