4-Chlorophenoxyacetic acid (4-CPA)
4-Chlorophenoxyacetic acid (4-CPA) is a widely used herbicide and plant growth regulator. 4-Chlorophenoxyacetic acid (4-CPA) mimics endogenous auxin and regulates plant cell division, differentiation and gene expression. 4-Chlorophenoxyacetic acid (4-CPA) is used to control weeds and promote fruit growth[3][4].