IPTG, Dioxane Free (Isopropyl-b-D-thiogalactoside)

IPTG is a carbohydrate used to induce b-galactosidase for the selection of recombinant plasmids. Used to select for lac Y mutants and to induce the lac operon in E. coli. IPTG will also induce the cellular content of lactose permease. It is used in conjunction with X-Gal or Bluo-Gal in blue-white selection of recombinant bacterial colonies that induce expression of the lac operon in E. coli.||Synonyms:|IPTG; Isopropyl-ß-D-thiogalactopyranoside; Isopropyl-ß-D-thiogalactoside||CAS No:|367-93-1||Molecular Formula:|C9H18O5S||Molecular Weight:|238.31||Appearance:|White crystalline or powder||Purity: |≥99%||Identity (IR):|Conforms to structure||pH (5%):|5.0-7.0||Solubility:|Colorless, clear, complete||Dioxane:|Not Detected||Specific Rotation (C=1,H2O):|-29° to -35°||Melting Point:|110-114°C||Water (KF):|≤1%||Blue-White Assay:|Induces b-galactosidase in a pUC 18-containing strain.||Storage and Stability:|Stable for 12 months after receipt at -20°C.