Custom Mixture of phenol ethoxylates 2044.15 4-Nonylphenol (isomer mix) 100µg/mL 1833.17 4-Nonoylphenol monoethoxylate (isomer mix) 100µg/mL 1832.17 4-Nonoylphenol diethoxylate (isomer mix) 100µg/mL 1976.21 4-Nonoylphenol triethoxylate (isomer mix)