24545-86-6 3',6'-Dihydroxy-4',5'-dinitrospiro(isobenzofuran-1(3H),9'-(9H)xanthene)-3-one 3',6'-Dihydroxy-4',5'-dinitrospiro(isobenzofuran-1(3h),9'-(9H)xan- then)-3-one CI 45396 EINECS 246-308-0 Solvent orange 16 Spiro(isobenzofuran-1(3H),9'-(9H)xanthen)-3-one, 3',6'-dihydroxy-4',5'-dinitro-