July 22 (Reuters) - Dow Inc on Thursday said its second-quarter profit doubled from the first, as prices for its chemicals used in plastics and packaging rose on the back of strong consumer and industrial demand as well as lower inventories. Net operating income, which excludes certain items, rose to $2.06 billion, or $2.72 per share, in the three months ended June 30, from $1.02 billion, or $1.36 per share, in the first quarter. (Reporting by Arathy S Nair in Bengaluru; Editing by Anil D’Silva) Our Standards: The Thomson Reuters Trust Principles.