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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Toxicity to aquatic algae and cyanobacteria

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Administrative data

Link to relevant study record(s)

Description of key information

MOE (2004) gives a 48 hr toxicity of octane-1-thiol to algae of ErC50: 0.03867 mg/l and NOEC: 0.010412 mg/L. This is supported by read across from dodecane-1-thiol. The NOEC, EC10 and EC50 for biomass and growth rate are below the solubility limit of dodecane-1-thiol as well as the limit of detection of analysis for the experiment, which corresponds to a concentration of  <14.5 ug/l.

Key value for chemical safety assessment

EC50 for freshwater algae:
0.039 mg/L
EC10 or NOEC for freshwater algae:
0.01 mg/L

Additional information

MOE (2004) is only available as a summary and so it has not been fully evaluated. This study is used as a critical study for the SIDS endpoint and is used in the IUCLID Data Set for Octane-1-thiol (2004). The study has been given a Klimisch score 2 - reliable with restrictions (Klimisch et al, 1997) in the IUCLID Data Set and is here considered as Klimisch 2 until the reference is available as being sponsored by MOE one can consider the study as relevant.

This is supported by read across from dodecane-1 -thiol. Thiebaud (1999) is a static, 72 -hour study which follows OECD guideline 201. It cannot be verified that the concentrations were maintained within 80% of the nominal concentrations, because the limit of solubility of dodecane-1-thiol is below the limit of analysis. The study has been given a reliability of 2 - reliable with restrictions (Klimisch et al 1997).