Indole-3-Acetic Acid CAS No. 87-51-4

Indole-3-Acetic Acid (IAA) 

CAS No.: 87-51-4 | EC No.: 201-748-2

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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

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2. Key Applications

Plant Growth Regulation

Root Development: Promotes adventitious root formationFruit Setting: Increases fruit retention and prevents premature droppingCell Division: Stimulates meristematic tissue growth

Physiological Effects

Regulates proton pump activity in cell membranesModulates plant phototropism and gravitropism

Research Applications

Standard auxin for plant tissue cultureEssential reagent for plant physiology studies

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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

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4. Physical & Chemical Properties

Light Sensitivity: Degrades under UV light (store in amber containers)Thermal Stability: Stable at room temperatureSolubility Enhancement: Soluble in alkaline solutions

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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

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6. Safety Information

Precautionary Statements:

H315: Causes skin irritationH319: Causes serious eye irritationH335: May cause respiratory irritation

Protective Measures:

P261: Avoid breathing dustP305+P351+P338: Eye contact rinse procedureP302+P352: Skin contact washing instructions

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7. Quality Specifications

Purity: ≥98% (HPLC)Loss on Drying: ≤0.5%Residue on Ignition: ≤0.1%

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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.

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