2NAA

2-Naphthaleneacetic acid, commonly abbreviated as 2-NAA, is a synthetic plant hormone in the auxin family. It is used to promote root formation in plant cuttings and in plant tissue culture, making it a common component of rooting powders, gels, and rooting solutions. As a synthetic analogue of natural indole-3-acetic acid, 2-NAA influences cellular processes that lead to adventitious root development, helping propagate a wide range of woody and herbaceous species.

In its commercial form, 2-NAA is frequently supplied as salts, such as the sodium salt, to improve solubility and ease of application. The chemical itself is typically a white to off-white solid with varying solubility in water depending on the salt form. Its activity depends on concentration, formulation, and the biological system being treated, with effectiveness varying across species and tissue types.

Applications of 2-NAA span horticulture, forestry, and plant tissue culture. It is used to improve rooting of cuttings, to enhance micropropagation protocols, and to support clonal propagation efforts in nurseries and research settings. It is often employed alongside other plant growth regulators to optimize rooting outcomes.

Safety and regulation: 2-NAA is handled as an agrochemical and should be used in accordance with product labels and applicable regulations. It can be an irritant to skin and eyes and should be used with appropriate protective equipment. Environmental considerations include limiting release to aquatic systems and following disposal guidelines.