3',6'-Dihydroxy-4',5'-diiodospiro(isobenzofuran-1(3H),9'-(9H)xanthene)-3-one 38577-97-8 4'5'-Diiodofluorescein 518-40-1 C.I. Solvent Red 73 CCRIS 4901 D & C Orange No. 10 D&C Orange no. 10 EINECS 254-010-7 Spiro(isobenzofuran-1(3H),9'-(9H)xanthen)-3-one, 3',6'-dihydroxy-4',5'-diiodo-