Name: China Factory Supply Top Quality 3-Indolebutyric acid CAS 133-32-4 with good service
Brand: Wuhan Fortuna Chemical Co., Ltd.

Specifications of 3-Indolebutyric acid CAS 133-32-4

Items	Specifications	Results
Appearance	Off-White crystal	Off-White crystal
Melting Point	122~124℃	122~124℃
Residues after Ignition	≤0.2%	0.15%
Loss on Drying	≤0.5%	0.24%
Content	≥98%	98.3%
Conclusion	The product conforms to the above specifications.

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Parameters of 3-Indolebutyric acid CAS 133-32-4

Product parameters
Cas number:	133-32-4
Appearance:	Off-white crystals
Purity:	98%min
Package details:	25kg/drum
Brand:	Fortunachem

Indole-3-butyric acid (IBA) is a synthetic plant hormone belonging to the auxin class. It is not produced in significant quantities by plants themselves but is the most widely used and effective rooting hormone in horticulture and agriculture. It is valued for its stability, effectiveness, and relatively low toxicity compared to the primary natural auxin, Indole-3-acetic acid (IAA).

Chemical Nature: It is a white to off-white crystalline powder. Structurally, it is similar to IAA but has a longer side chain (a butyric acid chain instead of acetic acid), which makes it more stable and less easily broken down by plant enzymes.

Primary Uses and Applications

IBA's core function is to stimulate adventitious root formation (roots that grow from stems, cuttings, or leaves rather than from the plant's main root system). This makes it indispensable in plant propagation.

1. Rooting of Cuttings (Main Use)

This is the most common and important application. IBA is used to dramatically increase the success rate and speed of root development in stem, leaf, or leaf-bud cuttings.

Ornamental Plants: Widely used for propagating roses, poinsettias, geraniums, ivy, and many woody ornamentals (e.g., azaleas, holly).
Fruit Trees & Vines: Essential for cloning rootstocks and cultivars of apples, cherries, grapes, and citrus.
Forestry: Used for propagating high-value timber species and endangered plants from cuttings.

2. Transplanting Aid

Applied as a root dip or soil drench for seedlings, trees, or other transplants to minimize transplant shock and encourage rapid development of new roots, helping the plant establish quickly in its new location.

3. Seed Germination Enhancement

For some species with dormant or difficult-to-germinate seeds, IBA treatment can help break seed dormancy and promote more uniform germination.

4. Tissue Culture (Micropropagation)

Used in plant tissue culture labs as a component of the growth medium to induce root formation in plantlets grown in vitro before they are transferred to soil.

5. Fruit Set and Growth

In some crops (like tomatoes), low concentrations can be used to improve fruit set and development, though other auxins like 4-CPA are more common for this specific use.

How It Works (Mechanism)

IBA functions as a signaling molecule:

Cell Elongation: It promotes elongation of plant cells in the stem and root.
Root Initiation: At the cut end of a stem cutting, it reprograms undifferentiated cells (parenchyma) near the vascular tissue to become root meristem cells (the "factory" for new roots).
Mobilization of Resources: It directs energy and nutrients to the site of application to fuel root growth.

While IBA itself has weak auxin activity, plants convert a portion of it into the more potent IAA, providing a slow-release effect that leads to sustained, effective rooting.

Application Forms & Methods

IBA is available to gardeners and professionals in several formulations:

Form	Description	Typical Use
Rooting Powder	IBA powder mixed with talc. Convenient and popular.	Dip the moistened cut end of the stem into the powder, tap off excess, and plant.
Liquid Concentrate	IBA dissolved in alcohol or other solvent. Can be diluted to precise concentrations.	Used as a quick-dip (soak cut ends for seconds) or as a long-term soak (diluted).
Gel Formulation	IBA in a gel base. Adheres well to the cutting.	Similar to powder; provides good contact with the stem.
Pre-treated Strips	Cuttings pre-dipped and dried by commercial growers.	Ready for direct planting.

Concentration is critical: Herbaceous cuttings require low concentrations (e.g., 500-1,000 ppm), while woody, difficult-to-root cuttings need higher doses (e.g., 3,000-10,000 ppm).

Advantages Over Natural Auxin (IAA)

More Stable: IBA is less prone to breakdown by light and plant enzymes (IAA oxidase).
Longer Lasting: Its conversion to IAA provides a prolonged effect.
More Effective: For rooting cuttings, it is consistently more reliable than IAA.
Less Toxic to Plants: Effective over a wider concentration range before becoming inhibitory.

Safety & Regulation

Toxicity: It has low acute toxicity to humans, birds, and bees but can be an eye and skin irritant.
Environmental Fate: It degrades readily in soil and water.
Regulation: It is a registered pesticide/plant growth regulator in many countries but is widely available to home gardeners.

Summary Table

Application Area	Primary Use	Desired Outcome
Horticulture & Gardening	Rooting stem/leaf cuttings	High success rate, faster root development for cloning plants.
Nursery & Forestry	Transplanting seedlings & trees	Reduced transplant shock, quick establishment.
Agriculture	Propagating fruit tree rootstocks	Efficient, uniform production of clonal rootstocks.
Plant Biotechnology	Tissue culture media component	Induces rooting in micropropagated plantlets.

In essence, Indole-3-butyric acid is the gold-standard synthetic tool for stimulating root growth. Its primary and most valuable use is in the vegetative propagation of plants, enabling gardeners, nurseries, and foresters to reliably clone plants from cuttings.