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Registration Dossier
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EC number: 273-257-1 | CAS number: 68955-19-1 This substance is identified by SDA Substance Name: C12-C18 alkyl alcohol sulfuric acid sodium salt and SDA Reporting Number: 16-062-04.
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
72h EC50 (Desmodesmus subspicatus, growth rate) = 20 mg/L (nominal concentration, EU Method C.3)
72h EC10 (Desmodesmus subspicatus, growth rate) = 7.6 mg/L (nominal concentration, EU Method C.3)
Key value for chemical safety assessment
- EC50 for freshwater algae:
- 20 mg/L
- EC10 or NOEC for freshwater algae:
- 7.6 mg/L
Additional information
Three studies are available for C12-18AS Na (CAS 68955-19-1). The key, GLP study of Scholz (1997) was conducted according to the EU method C.3 with Desmodesmus subspicatus. The EC50 value for growth rate reported after 72 h of exposure was 20 mg/L. The 72-hour EC10 value was 7.6 mg/L.
A supporting test was preformed by Marshall (1992) according to OECD 201 with Desmodesmus subcapitatus. The 72 h EC50 for growth rate and biomass, as well as NOEC for biomass were above 3.09 mg/L.
The further available supporting study of (Muhlberg 1992) is conducted according to the German standard method DIN 38412, part 9. The 96-hour EC50 was 38 mg/L based on cell number.
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