Synonyms: Ethanol,2,2'-[[4-(methylamino)-3-nitrophenyl]imino]di- (7CI,8CI);1-Methylamino-2-nitro-4-N,N-(bis-b-hydroxyethyl)aminobenzene; HC Blue 1; HC Blue No. 1; HC Blue Number 1;N-Methyl-N',N'-bis(2-hydroxyethyl)-2-nitro-p-phenylenediamine;N1-Methyl-N4,N4-bis(2-hydroxyethyl)-2-nitro-p-phenylenediamine;N4,N4-Bis(2-hydroxyethyl)-N1-methyl-2-nitro-p-phenylenediamine;N4,N4-Bis(2'-hydroxyethyl)-N1-methyl-2-nitro-p-phenylenediamine