Registration Dossier

Administrative data

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:
PNEC aqua (freshwater)
PNEC value:
0.13 mg/L
Assessment factor:
10
Extrapolation method:
assessment factor
PNEC freshwater (intermittent releases):
0.41 mg/L

Marine water

Hazard assessment conclusion:
PNEC aqua (marine water)
PNEC value:
0.013 mg/L
Assessment factor:
100
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

Hazard for terrestrial organisms

Soil

Hazard assessment conclusion:
no exposure of soil expected
Extrapolation method:
equilibrium partitioning method

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
no potential for bioaccumulation

Additional information

As 1,1,1-trichloroethane is nowadays only used as an intermediate for chemical synthesis in closed system processes under strictly controlled conditions, there is no formal necessity to derive PNECs for foreseeable releases in environment. Nevertheless, as acute and chronic aquatic ecotoxicity test results are available, freshwater and marine aquatic PNECs are provided. A PNEC for intermittent release is also provided for information, in case of an accidental emission, as this relates to acute effects. Other PNECs are not derived based on lack of exposure of these compartments.

Conclusion on classification

Presently, the environmental classification of 1,1,1-trichloroethane according to dir. 67/548, annex 1 and 1272/2008 regulation, annex 6, table 3.2 is

N - Dangerous for the environment.

R59 - Dangerous for the ozone layer.

According to the acute aquatic toxicity data that sets in the range 10 -100 mg/l. Chronic toxicity data are available for the 3 trophic levels and are above 1 mg/l. The substance is not rapidly biodegradable but has low potential for bioaccumulation. According to talbe 4.1.0 of Commission Regulation No 286/2011 (2nd ATP to CLP regulation), 1,1,1 -trichloroethane is not to be classified as dangerous to the aquatic environment.

According to Commission Regulation No 286/2011, 1,1,1 -trichloroethane is not to be classified as hazardous to the ozone layer "H420: Harms public health and the environment by destroying ozone in the upper atmosphere"