Registration Dossier
Registration Dossier
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EC number: 201-184-7 | CAS number: 79-19-6
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
The Effective concentration (EC50) for Thiosemicarbazide was found to be 19 mg/L and the NOEC is 2.8mg/L in a 72 hr study conducted on Algae on the basis of effect on growth rate.
Key value for chemical safety assessment
- EC50 for freshwater algae:
- 19 mg/L
- EC10 or NOEC for freshwater algae:
- 2.8 mg/L
Additional information
Toxicity test of thiosemicarbazide was done at two concentration 2.8 mg/L and 19 mg/L for 72 h. The EC50 value for thiosemicarbazide is considered to be 19mg/L and the NOEC is 2.8 mg/L.
Based on the value and biodegradability status, the substance may be classified in aquatic chronic category 3 as per the CLP regulation.
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