Aromatic Azo- and Benzidine-Based Substances


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Azo Unknowns

Substances Colour Index (C.I.) Information [1] Empirical Data Availability [***] Section 71
Chemical Abstracts Service Registry Number (CAS RN) Domestic Substances List (DSL) Name C.I. Generic Name(s) C.I. Consti-
tution Number(s)
Other CASNo. Asso-
ciated with C.I. name / number
Physical-Chemical Properties Ecolo-
gical End-
points
Health End-
points
Water Solu-
bility
Log Kow Mel-
ting / Decom-
posi-
tion point
Monoazo Unknowns
63224-47-5 Benzenediazonium, 4-[(2,6-dichloro-4-nitrophenyl)azo]-2,5-dimethoxy-, (T-4)-tetrachlorozincate(2-) (2:1) -- -- -- -- -- -- -- X N
63281-10-7 3-Pyridinecarbonitrile, 5-[[2-chloro-4-(methylsulfonyl)phenyl]azo]-4-methyl-2,6-bis[[3-(2-phenoxyethoxy)propyl]amino]- -- -- -- -- -- -- -- -- N
72391-06-1 Spiro[isobenzofuran-1(3H),9’(8’aH)-xanthylium], 3’,6’-bis(diethylamino)-3-oxo-, chloride, compd. with [4-[(4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]-3-hydroxy-1-naphthalenesulfonato(3-)]chromium (1:1) -- -- -- -- -- -- -- -- Y
83221-38-9 Benzenesulfonamide, 4-[[4-[[4-(2-hydroxybutoxy)-3-methylphenyl]azo]phenyl]amino]-3-nitro-N-(phenylsulfonyl)-, monolithium salt -- -- -- -- -- -- -- -- Y
Disoazo Unknowns
6708-61-8 1-Triazene, 1-(4-nitro-1-naphthalenyl)-3-[4-(phenylazo)phenyl]- -- -- -- -- -- -- -- -- Y

Notes and Legend

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2026-10-08