indicatorforoxidimetry;ERIO GREEN B [INDICATOR FOR OXIDIMETRY];sodium 4-[[4-(diethylamino)phenyl]-(4-diethyliminiocyclohexa-2,5-dien-1-ylidene)methyl]naphthalene-2,7-disulfonate;sodium 4-[[4-(diethylamino)phenyl]-(4-diethylazaniumylidenecyclohexa-2,5-dien-1-ylidene)methyl]naphthalene-2,7-disulfonate;N-Ethyl- or N-Methyl-quaternized 4-[(4-Aminophenyl)(4-imino-2,5-cyclohexadien-1-ylidene)methyl]-2,7-naphthalenedisulfonic acid hydroxide inner salt sodium salt