CAS 9038-95-3 appears in our catalog under these names: Poly(ethylene glycol-ran-propylene glycol) monobutyl ether average Mn ~3000, POLY(ETHYLENE GLYCOL-RAN-PROPYLENE GLYC&, Ethylene oxide-propylene oxide copolymer monobutyl ether, Mw 4000, MW:4000, Ethylene oxide-propylene oxide copolymer monobutyl ether, Mw 1000. Offered by: Ambeed, Sigma-Aldrich, Fluorochem. Available pack sizes: 100g, 500g, 1000g, 1L, 1kg.