CAS 9003-13-8 appears in our catalog under these names: Butoxypolypropylene glycol, POLY(PROPYLENE GLYCOL) MONOBUTYL ETHER,&, Poly(propylene glycol) monobutyl ether, Butoxypolypropylene glycol. Offered by: GLPBio, Sigma-Aldrich, Chemat. Available pack sizes: 1l, 250ml, 5l, 100g, 500g, 2.5kg.