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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Ecotoxicological information

Ecotoxicological Summary

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Administrative data

Hazard for aquatic organisms

Freshwater

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

Marine water

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

STP

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

Sediment (freshwater)

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

Sediment (marine water)

Hazard assessment conclusion:
PNEC sediment (marine water)
PNEC value:
0.276 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:
0.544 mg/kg soil dw
Extrapolation method:
equilibrium partitioning method

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
no potential for bioaccumulation

Additional information

Conclusion on classification

Official classification:

Aquatic compartment

According to Regulation (EC) No 1272/2008 Annex VI Table 3.1 and Table 3.2 the substance holds no relevant classification.

 

Self-classification:

Aquatic compartment

The substance is not considered to be acutely hazardous to the aquatic environment.

The substance is considered to be chronically hazardous to aquatic organisms (Category Chronic 3).

 

According to the criteria outlined in Table 4.1.0(a) (Commission Regulation (EU) No 286/2011 amending Regulation (EC) No 1272/2008), DMCHA (CAS 98-94-2) is not to be classified as acutely hazardous to the aquatic environment since the lowest acute effect value is greater than 1 mg/L (Algae, 72 h ErC50 = 3.5 mg/L).

Long-term toxicity data are available for daphnia and algae. Therefore, classification is based on the available chronic data and on acute toxicity data for the trophic level not covered by chronic data (fish).

 

Chronic toxicity data:

The substance is rapidly degradable and the lowest EC10 is > 0.1 and ≤ 1 mg/L (Algae, 72-h ErC10 = 0.6 mg/L; BASF SE, 2019). According to the criteria outlined in Table 4.1.0(b) (ii) (Commission Regulation (EU) No 286/2011 amending Regulation (EC) No 1272/2008), the substance is to be classified as chronically hazardous to the aquatic environment (Category Chronic 3).

 

Acute toxicity data:

The LC50 determined for fish was > 10 to ≤ 100 mg/L (96 h LC50 = 28.1 mg/L, not pH-adjusted). In addition, it should be noted that, no mortality was observed at a concentration of 100 mg/L after pH-adjustment (BASF AG, 1988; report no. 10F0354/875163). The substance is rapidly degradable, the log Kow is < 4, and the BCF value is < 500. Therefore, the substance does not meet the criteria outlined in Table 4.1.0(b) (iii) (Commission Regulation (EU) No 286/2011 amending Regulation (EC) No 1272/2008). The substance is not to be classified as chronically hazardous to the aquatic environment.

 

In summary, it can be concluded that DMCHA (CAS 98-94-2) is to be classified as chronically hazardous to the aquatic environment (Category Chronic 3).