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EC number: 210-868-4 | CAS number: 624-89-5
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
The results show that ErC50 and NOECr (based on growth rate) are higher than 500 mg/L and 76 mg/L (based on nominal concentrations), respectively. Thus EMS was found to be slightly harmful to algae.
Key value for chemical safety assessment
- EC10 or NOEC for freshwater algae:
- 76 mg/L
Additional information
The determination of the growth inhibition of the fresh algae Pseudokirchneriella subcapitata exposed to ethyl methyl sulphide for a duration of 72h was performed following the method OECD 201 and according to GLP (Thiébaud, 2001). Algae were exposed to the following nominal concentrations for 72h: 0, 76, 122, 195, 313 and 500 mg/L. The final concentrations of methyl ethyl sulfide were maintained within the designated limit of 80% of the initial concentrations in non inoculated flasks. Therefore, the effect concentrations and NOEC have been calculated using the nominal concentrations.
The study was performed using an algal suspension so that the initial cell concentration was equal to 1x10E4 cells/mL. The algal concentration was measured daily. Analytical chemistry (gas chromatography) and physical-chemical measurement (pH and O2 concentration) were carried out at the beginning and the end of the test. The validity criteria of the study were respected: the increase in cell density (R), measured in the control solution between the end and the beginning of the test, was greater than a factor of 16 (R = 114) .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.
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