70750-17-3 C12-13 Pareth-5 carboxylic acid PEG-5 C12-13 Alkyl ether carboxylic acid Poly(oxy-1,2-ethanediyl), alpha-(carboxymethyl)-omega-hydroxy-,C12-13-alkyl ethers Polyethylene glycol (5) C12-13 alkyl ether carboxylic acid Polyoxyethylene (5) C12-13 alkyl ether carboxylic acid