iodic acid 25659-31-8 CHEBI:24857 HIO3 HOIO2 Iodsaeure [IO2(OH)] hydrogen trioxoiodate hydroxidodioxidoiodine hydroxy-lambda(5)-iodanedione 58060_FLUKA trioxoiodic acid Caswell No. 499A EINECS 231-962-1 EPA Pesticide Chemical Code 046902 Iodic acid (HIO3) Monoiodic acid 221929_SIAL