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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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:
1.6 mg/L
Assessment factor:
100
Extrapolation method:
assessment factor
PNEC freshwater (intermittent releases):
5.48 mg/L

Marine water

Hazard assessment conclusion:
PNEC aqua (marine water)
PNEC value:
0.16 mg/L
Assessment factor:
1 000
Extrapolation method:
assessment factor

STP

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

Sediment (freshwater)

Hazard assessment conclusion:
PNEC sediment (freshwater)
PNEC value:
1 050 mg/kg sediment dw
Extrapolation method:
equilibrium partitioning method

Sediment (marine water)

Hazard assessment conclusion:
PNEC sediment (marine water)
PNEC value:
105 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:
1 045 mg/kg soil dw
Extrapolation method:
equilibrium partitioning method

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
no potential for bioaccumulation

Additional information

In accordance with the “Guidance on information requirements and chemical safety assessment, Chapter R.10" :

- an AF of 100 is applied to the long-term toxicity value NOEC(160.5 mg/L) for the derivation of the freshwater PNECaqua.

- an AF of 1000 is applied to the long-term toxicity value NOEC (160.5 mg/L) for the derivation of the marine water PNECaqua.

- an AF of 100 is applied to the lowest short-term toxicity value LC50 (548 mg/L) for the derivation of the intermitent release PNECaqua.

Conclusion on classification

For the classification:


Acute:


lowest EC 50 for MgCL2: 548 mg/L, Biesinger et al.(1972)). The MgCL2 is not classified for acute toxicity.


 


Chronic.


lowest NOEC 21 d for MgCL2= 160.5 mg/L. The MgCL2 is not classified for chronic toxicity.


Although no chronic data are available for fish, the remaining Chronic 4 classification category under CLP can be removed based on the following arguments:



  • Fish are less sensitive compared to aquatic invertebrates based on the acute toxicity data.

  • The lowest LC50 for fish is 2119.5 mg of MgCl2/L (541 mg Mg/L), which is more than 500 times higher than the chronic threshold concentration level (1 mg/L). This observation strongly suggests that no chronic effects below 1 mg Mg/L are expected for fish.

  • No significant chronic effects are noted for both algae and daphnids at a concentration of 1 mg Mg/L


 


Magnesium Chloride is not classified as dangerous for the environment under the CLP regulation 1272/2008.