Chronic toxicity of azo and anthracenedione dyes to embryo-larval life stages of the Fathead minnow (Pimephales promelas) - Benzenesulfonic acid, 3,3'-[(9,10-dihydro-9,10-dioxo- 1,4-anthracenediyl)diimino]bis[2,4,6-trimethyl-, disodium salt (Acid Blue 80)