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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

An OECD 201 study using the mixed isomers (m and p) of diisopropylbenzene was conducted by the Japanese MOE.

Key value for chemical safety assessment

EC50 for freshwater algae:
2.7 mg/L
EC10 or NOEC for freshwater algae:
0.69 mg/L

Additional information

In a study conducted according to OECD Guideline 201 (Alga, Growth Inhibition Test), Selenastrum capricornutum were exposed to diisopropylbenzene concentrations for 72 h in closed system and EC50 and NOEC in respect to biomass and growth rate determined. The test was conducted using solvent (mixture of a dispersant of HCO40 and DMF) and the estimated values were higher than water solubility, however, analytical monitoring was done. In respect to biomass the 72 h EbC50 and NOEC were determined to be 1.6 mg/L and 0.31 mg/L (measured concentrations) and in respect to growth rate the 72 h ErC50 and NOEC were found to be 2.7 mg/L and 0.69 mg/L (measured concentrations), respectively. The EC50 and NOEC values are higher than the water solubility of DIPB thereby indicating that the substance is not toxic at the limit of water solubility.