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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Marine water

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

STP

Hazard assessment conclusion:
no emission to STP expected

Sediment (freshwater)

Hazard assessment conclusion:
no exposure of sediment expected

Sediment (marine water)

Hazard assessment conclusion:
no exposure of sediment expected

Hazard for air

Air

Hazard assessment conclusion:
no hazard identified

Hazard for terrestrial organisms

Soil

Hazard assessment conclusion:
PNEC soil
PNEC value:
16 µg/kg soil dw
Extrapolation method:
equilibrium partitioning method

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
no potential for bioaccumulation

Additional information

Based on the available aquatic toxicity data, mmt is classified as highly toxic to aquatic life. Based on the available data and information, mmt is not readily biodegradable and a half life was unable to be calculated. Based on the available data, the bioaccumulation factor for mmt is less than 2000 and would therefore not meet the bioaccumulation criterion. Therefore, as mmt does not meet the bioacculative criterion for PBT or vPvB, it would not be considered either PBT or vPvB.

Conclusion on classification

For acute classification purposes, the lowest LC50 or 0.21 mg/l (acute fish toxicity) was considered. According with EC/1272/2008, mmt is classified as an Acute Aquatic Category 1 toxicant. The Hazard Statement associated with this classifications is ‘H400: Very toxic to aquatic life’.

 

For chronic classification purposes, the algal NOEC of 0.07 was used. This in conjunction with the fact that mmt is not biodegradable (see section 5.2 of the IUCLID data set) result in a classification per EC/1272/2008 as a Chronic Aquatic Category 1 toxicant. The Hazard statement associated with this classification is ‘H410: Very toxic to aquatic life with long lasting effects’.