Registration Dossier
Registration Dossier
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EC number: 202-179-2 | CAS number: 92-69-3
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
Key value for chemical safety assessment
- EC50 for freshwater algae:
- 2.8 mg/L
- EC10 or NOEC for freshwater algae:
- 0.32 mg/L
Additional information
- The effect of P-PP test item was assessed on algal growth using the unicellular green alga Pseudokirchneriella subcapitata (Selenastrum capricornutum), over an exposure period of 72 hours.
- With respect to the inhibitory effect of the test item, the 0-72 h average specific growth rates yield and areas were significantly different from that of the control group in the examined concentration range of 0.59 - 6.33 mg/L (measured). The overall NOEC was determined as 0.32 mg/L (measured); the overall LOEC was determined as 0.59 mg/L (measured).
- The biological results are summarised in the following table:
Parameter (0-72h) Growth rate (r) (mg/L) Yield (y) (mg/L) Biomass (b) (mg/L)
(Calculation based on measured geometric mean concentrations)
EC50 2.80 0.86 1.07
95% conf. limits 2.37 – 3.30 0.77 – 0.97 0.95 – 1.21
NOEC 0.32 0.32 0.32
LOEC 0.59 0.59 0.59
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