Registration Dossier

Data platform availability banner - registered substances factsheets

Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Toxicity to aquatic algae and cyanobacteria

Currently viewing:

Administrative data

Link to relevant study record(s)

Description of key information

Based on nominal concentrations the 72-hour EC50 values for growth rate Selenastrum capricornutum was estimated to be 166 mg/L (closed system) and 213 mg/L (open system), based on measured values of 1,2-dichlorethane. 

Key value for chemical safety assessment

EC50 for freshwater algae:
166 mg/L

Additional information

The acute toxicity of 1,2-dichloroethane upon the growth of a freshwater green alga (Selenastrum capricornutum) was observed over a period of 72 hours in a static test according to OECD guideline 201 adapted for volatile substances (closed system enriched in CO2). The EC50 for biomass was determined to be 166 mg/L.

Further on, the following additional information on toxicity to algae and cyanobacteria is available:




Haematococcus pluvialis

> 1000 mg/L (24 h)

(change in photosynthetic oxygen production)

Krebs, F. (1985)

Desmodesmus subspicatus

412 mg/L TT (7 days)

Trenel, J. & Kuehn, R. (1982)

Desmodesmus subspicatus

710 mg/L TT (8 days)

Bringmann, G. % Kuehn, R. (1980)

Skeletonema costatum

> 433 mg/L (96 h)

Syracuse Res. Corp. (1978)

Mycrocytis aeruginosa

105 mg/L TT (8 days)

Bringmann, G. & Kuehn, R. (1978)

Phaeodactylum tricornutum

340 mg/L

(primary productivity)

Pearson, al.(1975)

Desmodesmus subspicatus

189 mg/L

Freitag, al.(1994)

Haematococcus pluvialis

130 mg/L

(inhibition of oxygen production)

Knie, J. (1983)

Reference list

Bringmann, G. & Kuehn, R. (1978): Vom Wasser 50, 45 - 60.

Bringmann, G. & Kuehn, R. (1980): Water Research 14, 231 - 241.

Freitag, D., Ballhorn, L., Behechti, A., Fisher, K. & Thumm, W. (1994): Structural configuration and toxicity of chlorinated alkanes; Chemosphere 282: 253-259.

Knie, J., Haelke, A., Juhnke, I., Schiller, W. (1983): Ergebnisse der Untersuchungen von chemischen Stoffen mit vier Biotests; Dtsch. Gewaesserkundl. Mitt. 27(3), 77-79.

Krebs, F. (1985): Bundesanstalt fuer Gewaesserkunde, 59 - 64, 73 - 75.

Pearson, C.R. & McConnell, G. (1975): Chlorinated C1 and C2 hydrocarbons in the marine environment. Proc. R. Soc. London, Ser. B. 189 (1096), 305-332.

Trenel, J. & Kuehn, R. (1982): Inst. Wasser-, Boden-, Lufthyg. Bundesgesundheitsamt, Juli 1982, 12 - 14, 25 - 27, Anlage 2 (23 - 28), Anlage 4 (1 - 5).

Syracuse Res. Corp. (1978): NTIS/OTS 0511060 # 40-7848049.