Indole-3-Acetic Acid (IAA) – Heteroauxin Plant Growth Hormone 99%
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  • Indole-3-Acetic Acid (IAA) – Heteroauxin Plant Growth Hormone 99%

IAA | Indole-acetic acid

€12,00
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Indole-3-acetic acid (IAA) – Heteroauxin

Other names: 3-Indoleacetic acid, 1H-Indole-3-acetic acid, Indoleacetic acid, Heteroauxin, β-Indoleacetic acid, IAA, indole acetic acid, indole-3-acetic acid
Agrotype: Plant growth regulator – Stimulator
Chemical formula: C₁₀H₉NO₂
CAS No.: 87-51-4
Purity: ≥ 98% active ingredient
Appearance: White powder
Solubility: Poorly soluble in water. Easily soluble in ethanol and methanol.
Shelf life: 3 years
Packaging options: 1 g, 3 g, 5 g, 10 g, 100 g, 1 kg (on request)
Similar products: Potassium salt of indole-3-acetic acid

Weight: 1 g
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Product Description

Indole-3-acetic acid (IAA), also known as heteroauxin, is a naturally occurring plant hormone from the auxin family — one of the most widely distributed and physiologically active growth regulators in plants.

IAA plays a vital role in plant growth and development by stimulating cell elongation and promoting cell division. Its influence extends far beyond growth stimulation — IAA is deeply involved in leaf abscission, flowering, fruit development, and many other physiological processes.

  • Leaf abscission control: Before leaf drop, the flow of IAA from the leaf to the petiole decreases sharply. Applying IAA to the petiole can prevent leaf fall.

  • Flowering and fruiting: IAA affects flower sex expression, pollen tube growth, and fruit development. Seeds produce IAA, which is transported to the fruit tissue and stimulates its growth. Removing seeds stops fruit growth, but growth resumes if IAA is supplied artificially.

  • Interaction with gibberellins: Some effects of gibberellins are mediated by their stimulation of IAA production.

It is important to note that while low concentrations of IAA stimulate plant growth, higher concentrations may inhibit it.

Recommended Uses

  • Plant propagation and seedling development

  • Stimulation of root, shoot, and fruit growth

  • Control of leaf abscission and enhancement of flowering

  • Use in plant tissue culture and biotechnology research

Preparation of Working Solution

  1. Use a small glass container.

  2. Add the required amount of IAA powder and a small amount of alcohol. Stir thoroughly.

  3. If undissolved powder remains, add a little more alcohol and continue stirring until the stock solution is completely clear.

  4. To prepare the working solution, dilute the required amount of the stock solution in water and mix well.

Alcohol will not harm the plants — its final concentration is extremely low and can even act as a mild fungicide.

Storage and Stability

  • Store the powder in a cool, dark place.

  • The working solution quickly loses activity and should be used within 24 hours.

  • The remaining stock solution can be stored at +3 °C to +8 °C for up to 2–3 weeks.

It is recommended to purchase IAA as a powder and prepare the working solution freshly before use.

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