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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Long-term toxicity to fish

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Administrative data

Link to relevant study record(s)

Description of key information

Long term effects on fish are not expected due to the high volatility of the test substance.

Key value for chemical safety assessment

Additional information

Due to the physico-chemical properties of chloroethane (CAS 75-00-3) a long-term toxicity of the substance to fish is not expected. Chloroethane is a gaseous substance characterised by a vapour pressure of 134200 Pa at 20 °C (62330 Pa at 0 °C). Dissolved chloroethane will evaporate from the water surface as indicated by the calculated Henry's Law constant of 1124.70 Pa m³/mol (Gossett, 1987).Thus the substance is not expected to exist in the aquatic compartment over a longer period of time.Due to these characteristics, extensive elimination by evaporation in conventional STPs can be expected. Therefore only low concentrations, if any, are likely to be released into the water phase. The potentially released substance will not accumulate in natural waters but evaporate from the natural water bodies. Thus, a long-term exposure of aquatic organisms is not anticipated. The substance is furthermore characterised by a very low bioaccumulation potential.

Therefore, and for reasons of animal welfare, long-term testing is omitted.


Waiving according to REACH Annex XI, section 2 (testing is technically not possible)
Chloroethane is a gas - testing is technically not feasible: the testing guidelines for chronic fish toxicity (OECD TG 210 and 215) have no provisions for testing of gases. On the contrary, flow-through systems cannot be closed but are open. If the volatility is high (extremely high for the gas chloroethane) even a high flow rate cannot compensate for the losses caused by volatility.
In conclusion, long-term testing is omitted.