CAS 23783-42-8 appears in our catalog under these names: Tetraethylene glycol monomethyl ether, Tetraethyleneglycol monomethyl ether, 98% , Tetraethyleneglycol monomethyl ether, Tetraethylene Glycol Monomethyl Ether, >98.0%(GC), Tetraethyleneglycol monomethyl ether, 98%. Offered by: GLPBio, Thermo Scientific (Alfa Aesar), Biosynth, TCI, Thermo Scientific (Acros). Available pack sizes: 500mg, 5g, 25g, 100g, 250g, 500g, 1000g, 2000g.