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Table 3 Toxicity data for dye 21 diluted in Daphnia media

From: Towards a reliable prediction of the aquatic toxicity of dyes

Concentration (mg L−1) Total immobilized organisms % pH
Control 0/20 0 6.75
1.25 0/20 0  
2.5 1/20 5  
5 2/10 10  
10 4/20 20b  
20a 1/20 5 6.33
  1. aDye precipitated, b more than 10% indicate toxicity