Provided is a compound which thickens or gels a fluid organic material to a desired viscosity, or which uniformly stabilizes the formulation of a composition containing the fluid organic material.The compound according to the present invention is represented by Formula (1):R1—(CONH—R2)n (1)where R1 represents an n-valent aromatic hydrocarbon group containing two or more benzene rings R2 represents an aliphatic hydrocarbon group containing 6 or more carbon atoms and n represents an integer of 4 or more. The group R1 is preferably a group corresponding to an aromatic hydrocarbon selected from the group consisting of benzophenone, biphenyl, and naphthalene, except for removing hydrogen atoms in a number of n from the aromatic hydrocarbon. A thickening/stabilizing agent according to the present invention includes the compound.
