7826
The HC5 - 50s predicted by the two approaches were two to five times ( metals ) and 10 to 100 times ( organic chemicals ) higher than the predicted no effect concentrations ( PNECs ) for the aquatic environment listed in the risk assessment reports .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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