Indole-3-Acetic Acid CAS No. 87-51-4
Agrochemicals 2025-03-02
Indole-3-Acetic Acid (IAA)
CAS No.: 87-51-4 | EC No.: 201-748-2
1. Chemical Identification
| Property | Specification |
|---|---|
| IUPAC Name | 1H-Indole-3-acetic acid |
| Molecular Formula | C₁₀H₉NO₂ |
| Molecular Weight | 175.18 g/mol |
| Appearance | Off-white to tan crystalline powder |
| Melting Point | 165-169°C |
| Refractive Index | 1.5460 (estimate) |
| pKa | 4.75 (at 25°C) |
| Solubility | Slightly soluble in water |
Synonyms:
Heteroauxin, 3-Indoleacetic acid, IAA
2. Key Applications
Plant Growth Regulation
- Root Development: Promotes adventitious root formation
- Fruit Setting: Increases fruit retention and prevents premature dropping
- Cell Division: Stimulates meristematic tissue growth
Physiological Effects
- Regulates proton pump activity in cell membranes
- Modulates plant phototropism and gravitropism
Research Applications
- Standard auxin for plant tissue culture
- Essential reagent for plant physiology studies
3. Product Advantages
✔ Natural Auxin Activity – Identical to endogenous IAA
✔ Dual Functionality – Can promote or inhibit growth depending on concentration
✔ Broad Compatibility – Effective across most plant species
4. Physical & Chemical Properties
- Light Sensitivity: Degrades under UV light (store in amber containers)
- Thermal Stability: Stable at room temperature
- Solubility Enhancement: Soluble in alkaline solutions
5. Handling & Storage
| Parameter | Requirement |
|---|---|
| Storage Temp | 2-8°C (refrigerated) |
| Packaging | 1kg aluminum foil bags |
| Shelf Life | 36 months when properly stored |
| Special Notes | Protect from light and moisture |
6. Safety Information
Precautionary Statements:
- H315: Causes skin irritation
- H319: Causes serious eye irritation
- H335: May cause respiratory irritation
Protective Measures:
- P261: Avoid breathing dust
- P305+P351+P338: Eye contact rinse procedure
- P302+P352: Skin contact washing instructions
7. Quality Specifications
- Purity: ≥98% (HPLC)
- Loss on Drying: ≤0.5%
- Residue on Ignition: ≤0.1%
Disclaimer:
This product is for research and agricultural use only. Application rates should be determined through field trials. Users must comply with local agricultural regulations.
