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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 200-158-2 | CAS number: 52-90-4
Short-term toxicity to fish
Administrative data
Link to relevant study record(s)
Description of key information
L-Cysteine induced no lethal effects in fish at 100 mg/L or below : the LC50 is > 100 mg/L.
Key value for chemical safety assessment
Additional information
The acute toxicity of L-Cysteine to zebra fish (Danio rerio) in a 96‑hour semi-static test with daily test medium renewal according to the EU Commission Directive 92/69/, Part C.1, the Commission Regulation (EC) No 440/2008, Part C.1 and the OECD Guideline for Testing of Chemicals No. 203 (1992) was investigated.A limit test was performed in accordance with the guidelines to demonstrate that the test item has no toxic effect on the test organisms at the nominal concentration of 100 mg/L. Thus, the only nominal concentration tested was 100 mg/L. In conclusion, the test item L-Cysteine had no acute toxic effects on zebra fish up to the nominal concentration of 100 mg/L under the present test conditions.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
