CAS 9003-13-8 appears in our catalog under these names: Butoxypolypropylene glycol, Poly(propylene glycol) monobutyl ether a, Poly(propylene glycol) monobutyl ether, Butoxypolypropylene glycol, average Mn 1500,RG. Offered by: GLPBio, Sigma-Aldrich, Chemat. Available pack sizes: 1l, 250ml, 5l, 100g, 500g, 2.5kg.