Disodium polyoxyethylene sulfosuccinate DNS 501 Poly(ethylene glycol) sulfosuccinate disodium salt Poly(oxy-1,2-ethanediyl), α-(3-carboxy-1-oxo-3-sulfopropyl)-ω-hydroxy-, disodium salt Poly(oxy-1,2-ethanediyl), α-(3-carboxy-1-oxo-3-sulfopropyl)-ω-hydroxy-, sodium salt (1:2) Polyethylene glycol monomaleate disodium sulfonate