Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.
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EC number: 200-158-2 | CAS number: 52-90-4
Endpoint summary
Administrative data
Description of key information
Acute/chronic toxicity - fish: LC50 Danio rerio = 100 mg / L / 96 hours (OECD 203)
Acute/chronic toxicity - aquatic invertebrates: EC50 Daphnia magna = 100 mg / L / 48 hours (OECD 202)
Acute/chronic toxicity - algae: EC50 Pseudokirchneriella subcapitata = 100 mg / L / 72 hours (OECD 201)
Toxicity to microorganisms and soil macro-organisms: EC50 (activated sludge of an exhaust system predominantly domestic) = 1000 mg / L / 3 hours (OECD 209)
Additional information
Bibliographic source:
ECHA Registration Dossier: L-cysteine.