The present invention provides an azo compound represented by the following general formula (I) and a colorant-containing curable composition containing a binder and an azo compound represented by the following general formula (I): ##STR1## wherein R1 represents a C1-21 alkyl, a C1-10 perfluoroalkyl, a C2-21 alkenyl, a C1-21 aryl, a C1-21 aralkyl, a C1-21 alkylamino, a C1-21 aralkylamino, a C1-21 arylamino, methacryloylamino, or ethoxycarbonylamino; R2 represents a single bond, —CH2—, —CH2CH2—, —CH2CH2CH2— or —CH2CH2CH2CH2—; R3 represents H, a C1-21 alkyl, a halogen, OH, or a C1-21, alkoxy; R4 represents a C1-21 alkyl, a C2-21 alkenyl, a C1-21 aryl, a C1-21 aralkyl or additionally H in the case of the colorant-containing curable composition; R5 represents H, a metal cation, or a cation of a nitrogen-containing compound; m=1 or 2 (additionally 0 in case of the colorant containing curable composition); and n=0 to 4.

 
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