General chemical formula of<unk> s<unk> s are compounds bearing the functional group diazenyl R−N=N−R′, in which R and R′ can be either aryl or alkyl. IUPAC defines<unk> s as: "Derivatives of diazene (diimide), HN=NH, wherein both hydrogens are substituted by hydrocarbyl groups, e.g. PhN=NPh<unk> benzene or diphenyldiazene." The more stable derivatives contain two aryl groups. The N=N group is called an<unk>  group. The name<unk>  comes from<unk> te, the French name for nitrogen that is derived from the Greek (a-, "not") + (zōē, life). Many textile and leather articles are dyed with<unk>  dyes and pigments.
Azo compound
Covid-Organics
Titratable acid
Perfluorinated compound
Alkylphenol
Polychlorinated naphthalene
Glycoside
Lewisite