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Figure 2.2
The reaction in the manufacture of azo-colorants (Verband der chemischen Industrie).
Azocolorants in Textiles and Toys
diazotization
+
coupling
R - NH2
®
R - N = N] Cl
–
R - N = N - R’
HCI,NaNO2
R’-H,NaOH
aromatic amine
diazonium
coupling-
azo-colorant
diazo component
compound
component