Potassium 4-(1H-indol-3-yl)butanoate（Cat No.:L045949）is an organic salt composed of a butanoic acid chain substituted with an indole ring at the 3-position and neutralized with a potassium cation. It typically appears as a solid, soluble in water and polar solvents. Structurally related to the natural compound indole-3-butyric acid (IBA), it serves as a plant growth regulator, particularly in stimulating root development in horticulture and agriculture. Its indole moiety allows biological activity, while the potassium salt form enhances solubility and handling. It is also used in biochemical research involving auxin-related pathways.