119251-83-1 28212-44-4 Nonoxynol-5 carboxylic acid Nonoxynol-8 carboxylic acid PEG-5 Nonyl phenyl ether carboxylic acid PEG-8 Nonyl phenyl ether carboxylic acid Poly(oxy-1,2-ethanediyl), alpha-(carboxymethyl)-omega-(4-nonylphenoxy)- Polyethylene glycol (5) nonyl phenyl ether carboxylic acid Polyethylene glycol 400 nonyl phenyl ether carboxylic acid Polyoxyethylene (5) nonyl phenyl ether carboxylic acid Polyoxyethylene (8) nonyl phenyl ether carboxylic acid