Plant Growth Regulator: Indole-3-butyric acid (IBA) functions as a potent plant hormone and auxin, promoting root development and enhancing plant growth.
Versatile Metabolite: As a plant metabolite, IBA plays a crucial role in the regulation of various physiological processes in plants, including cell elongation and division.
Natural Origin: Derived from butyric acid, IBA is a naturally occurring compound, making it a preferred choice for organic farming and sustainable agricultural practices.
Effective in Rooting: IBA is widely used in horticulture and agriculture to promote rooting in plant cuttings, aiding in the propagation of various plant species.
Indole-3-butyric acid is an indole-3-yl carboxylic acid, where butanoic acid is attached to a 1H-indol-3-yl group at the first position. It acts as a plant hormone, auxin, and plant metabolite. This compound is derived from butyric acid and is the conjugate acid of indole-3-butyrate.

Parameters
| Melting point | 124-125.5 °C(lit.) |
| Boiling point | 341.55°C (rough estimate) |
| density | 1.1255 (rough estimate) |
| bulk density | 360kg/m3 |
| refractive index | 1.5440 (estimate) |
| storage temp. | 2-8°C |
| solubility | DMF: 25 mg/mL; DMSO: 25 mg/mL; Ethanol: 25 mg/mL; PBS (pH 7.2): 0.1 mg/mL |
| pka | 4.83±0.10(Predicted) |
| form | Liquid |
| color | Clear colorless to pale yellow |
| Water Solubility | Soluble in water(0.25g/L). |
| Sensitive | Air Sensitive |
| Merck | 14,4965 |
| BRN | 171120 |
| Stability: | Stable. Incompatible with strong oxidizing agents. Light sensitive. |
| InChIKey | JTEDVYBZBROSJT-UHFFFAOYSA-N |
| LogP | 2.300 |
| CAS DataBase Reference | 133-32-4(CAS DataBase Reference) |
| EPA Substance Registry System | Indole-3-butyric acid (133-32-4) |
Safety Information
| Hazard Codes | T,Xi |
| Risk Statements | 25-36/37/38 |
| Safety Statements | 26-36-45-38-36/37/39-28A |
| RIDADR | UN 2811 6.1/PG 3 |
| WGK Germany | 3 |
| RTECS | NL5250000 |
| F | 8-10-23 |
| Hazard Note | Irritant |
| TSCA | T |
| HazardClass | 6.1 |
| PackingGroup | III |
| HS Code | 29339990 |
| Hazardous Substances Data | 133-32-4(Hazardous Substances Data) |
| Toxicity | LD50 i.p. in mice: 100 mg/kg (Anderson) |

Indole butyric acid (IBA) is a versatile plant growth regulator from the indole class, known for its effectiveness as a rooting agent. It promotes root formation in both herbaceous and woody ornamental plants. Additionally, it can be used to enhance fruit setting in crops, improving the overall fruit setting rate.

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