- les colorants nitrés comme par exemple le 1,4-bis-[(2-hydroxyethyl)amino]-2-nitrobenzene, le 1-(2-hydroxyethyl)amino-2-nitro-4-[di-(2-hydroxyethyl)amino]benzene (HC Blue No. 2), le 1-amino-3-methyl-4-[(2-hydroxyethyl)amino]-6-nitrobenzene (HC Violet No. 1), le chlorhydrate de 4-[ethyl-(2-hydroxyethyl)amino]-1-[(2-hydroxyethyl)amino]-2-nitrobenzene (HC Blue No. 12), le 1-[(2,3-dihydroxypropyl)amino]-4-[methyl-(2-hydroxyethyl)amino]-2-nitrobenzene (HC Blue No. 10), le chlorhydrate de 1-[(2,3-dihydroxypropyl)amino]-4-[ethyl-(2-hydroxyethyl)amino]-2-nitrobenzene (HC Blue No. 9), le 1-(3-hydroxypropylamino)-4-[di-(2-hydroxyethyl)amino]-2-nitrobenzene (HC Violet No. 2), le 1-amino-4-[(2-hydroxyethyl)amino]-2-nitrobenzene (HC Red No. 7), le 2-amino-4,6-dinitrophenol, 1,4-diamino-2-nitrobenzene (CI76070), le 4-amino-2-nitrodiphenylamine (HC Red No. 1), le chlorhydrate de 1-amino-4-[di-(2-hydroxyethyl)amino]-2-nitrobenzene (HC Red No. 13), le 1-amino-5-chloro-4-[(2-hydroxyethyl)amino]-2-nitrobenzene, le 4-amino-1-[(2-hydroxyethyl)amino]-2-nitrobenzene (HC Red No. 3), le 4-amino-2-nitro-1-(prop-2-en-1-yl)amino)benzene, le 4-amino-3-nitrophenol, le 4-[(2-hydroxyethyl)amino]-3-nitrophenol, le 4-[(2-nitrophenyl)amino]phenol (HC Orange No. 1), le 1-[(2-aminoethyl)amino]-4-(2-hydroxyethoxy)-2-nitrobenzene (HC Orange No. 2), le 4-(2,3-dihydroxypropoxy)-1-[(2-hydroxyethyl)amino]-2-nitrobenzene (HC Orange No. 3), le 1-amino-5-chloro-4-[(2,3-dihydroxypropyl)amino]-2-nitrobenzene (HC Red No. 10), le 5-chloro-1,4-[di-(2,3-dihydroxypropyl)amino]-2-nitrobenzene (HC Red No. 11), le 2-[(2-hydroxyethyl)amino]-4,6-dinitrophenol, le 4-ethylamino-3-nitrobenzoic acid, le 2-[(4-amino-2-nitrophenyl)amino]benzoic acid, le 2-chloro-6-ethylamino-4-nitrophenol, le 2-amino-6-chloro-4-nitrophenol, le 4-[(3-hydroxypropyl)amino]-3-nitrophenol, la 2,5-diamino-6-nitropyridine, la 3-amino-6-(methylamino)-2-nitropyridine, la 1,2,3,4-tetrahydro-6-nitroquinoxaline, la 7-amino-3,4-dihydro-6-nitro-2H-1,4-benzoxazine (HC Red No.14), le 1,2-diamino-4-nitrobenzene (CI76020), le 1-amino-2-[(2-hydroxyethyl)amino]-5-nitrobenzene (HC Yellow No. 5), le 1-(2-hydroxyethoxy)-2-[(2-hydroxyethyl)amino]-5-nitrobenzene (HC Yellow No. 4), le 1-[(2-hydroxyethyl)amino]-2-nitrobenzene (HC Yellow No. 2), le 2-[(2-hydroxyethyl)amino]-1-methoxy-5-nitrobenzene, 2-amino-3-nitrophenol, 1-amino-2-methyl-6-nitrobenzene, le 1-(2-hydroxyethoxy)-3-methylamino-4-nitrobenzene, le 2,3-(dihydroxy-propoxy)-3-methylamino-4-nitrobenzene, le 2-[(2-hydroxyethyl)amino]-5-nitrophenol (HC Yellow No. 11), le chlorhydrate de 3-[(2-aminoethyl)amino]-1-methoxy-4-nitrobenzene (HC Yellow No. 9), le 1-[(2-ureidoethyl)amino]-4-nitrobenzene, le 4-[(2,3-dihydroxypropyl)amino]-3-nitro-1-trifluoromethylbenzene (HC Yellow No. 6), le 1-chloro-2,4-bis-[(2-hydroxyethyl)amino]-5-nitrobenzene (HC Yellow No.10), le 4-[(2-hydroxyethyl)amino]-3-nitro-1-methylbenzene, le 1-chloro-4-[(2-hydroxyethyl)amino]-3-nitrobenzene (HC Yellow No. 12), le 4-[(2-hydroxyethyl)amino]-3-nitro-1-trifluoromethylbenzene (HC Yellow No. 13), le 4-[(2-hydroxyethyl)amino]-3-nitrobenzonitrile (HC Yellow No. 14), le 4-[(2-hydroxyethyl)amino]-3-nitrobenzamide (HC Yellow No. 15), et le 2,4-dinitro-1 -hydroxynaphthalene.