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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Ecotoxicological information

Endpoint summary

Administrative data

Description of key information

Additional information

L-Cysteine shows no aquatic toxicity in acute testing.

Long-term testing

In Annex IX REACH, it is laid down that long-term toxicity testing shall be proposed by the registrant if the CSA indicates the need to investigate further the effects. According to Annex I of REACH, the CSA triggers further action when the substance fulfils the criteria for any of most hazard classes or categories set out in Annex I to Regulation (EC) No. 1272/2008 (for details see REACH Annex I section 0.6.3.) or is assessed to be a PBT or vPvB.

The hazard assessment reveals neither a need to classify the substance as dangerous to the environment, nor is it a PBT or vPvB substance, nor are there any further indications that the substance may be hazardous to the environment.

Therefore, and for reasons of animal welfare, a long-term toxicity testing is not required.