When it comes to rooting agents, I’m sure we are all familiar with them. Common ones include naphthaleneacetic acid, IAA 3-indole acetic acid, IBA 3-Indolebutyric-acid, etc. But do you know the difference between indolebutyric acid and indoleacetic acid?
【1】 Different sources
IBA 3-Indolebutyric-acid is an endogenous hormone in plants. Its source is within plants and it can be synthesized within plants. IAA 3-indole acetic acid is an artificially synthesized substance, similar to IAA, and does not exist in plants.
【2】 Their physical and chemical properties are different
Pure IAA 3-indole acetic acid is a colorless leaf-like crystal or crystalline powder. It is readily soluble in anhydrous ethanol, ethyl acetate and dichloroethane, soluble in ether and acetone, and insoluble in benzene, toluene, gasoline and chloroform.
IBA 3-Indolebutyric-acid is soluble in organic solvents such as acetone, ether and ethanol, but poorly soluble in water.
【3】 Different stability:
The mechanisms of action of IAA 3-indole acetic acid and IBA 3-Indolebutyric-acid are basically similar. They can promote cell division, elongation and expansion, induce tissue differentiation, enhance the permeability of cell membranes, and accelerate the flow of protoplasm. However, IBA 3-Indolebutyric-acid is more stable than IAA 3-indole acetic acid, but it is still prone to decomposition when exposed to light. It is better to store it away from light.
【4】 Compound preparations:
If the regulators are compounded, the effect will be superimposed or even better. Therefore, it is still recommended to be compounded with similar products, such as sodium naphthoacetate, sodium nitrophenolate, etc.
Post time: Sep-08-2025