What is Gibberellic Acid CAS 77-06-5?

Gibberellic acid, also called gibberellin A3 or GA3, is a naturally occurring plant hormone with the formula C19H22O6. It is supplied as a white to pale yellow crystalline powder and used as a plant-growth regulator.

What are the main agricultural uses of GA3?

GA3 is used to break seed dormancy, promote germination, stimulate stem elongation, improve flowering, fruit set and berry sizing, and improve crop uniformity. It is used on crops such as grapes, citrus, rice, vegetables, cotton and flowers.

Why is Gibberellic Acid used in grape production?

In table grapes, GA3 can improve cluster elongation, berry size and fruit set, and support production of seedless or more uniform fruit. Response depends on variety, dose, timing and growing conditions, so local recommendations should be followed.

How is Gibberellic Acid applied and how soluble is it?

GA3 is generally dissolved in a suitable organic solvent or formulated as a water-soluble powder/tablet before dilution into an aqueous spray. The free acid has low water solubility, commonly about 5 g/L at room temperature, so use a formulation or preparation method suited to the target crop and equipment.

What is the chemical stability of GA3?

Dry GA3 is relatively stable, and acidic solutions are more stable than alkaline ones. It degrades under alkaline conditions, and prepared aqueous solutions should normally be used promptly and kept away from prolonged heat or incompatible alkaline materials.

Which specifications should I check before ordering Gibberellic Acid?

Confirm GA3 content, appearance, loss on drying, pH, residue on ignition and any registration or related-impurity requirements. Technical-grade material is often quoted at 90% or higher, while formulation or analytical requirements may need a different purity.

Gibberellic Acid CAS 77-06-5

Gibberellic Acid (CAS 77-06-5) is a pentacyclic diterpene acid functioning as a highly active plant growth regulator in agricultural crop management and the malting industry. Chemically identified as Gibberellin A3 or GA3, this white to pale yellow crystalline powder acts to stimulate rapid cell elongation, break seed dormancy, and induce flowering. As a potent Gibberellin hormone derivative, it is widely utilized in grape viticulture to increase berry size and in breweries to accelerate barley germination. We ensure bulk supply capabilities for this material, providing access to competitive factory pricing and customized specifications to meet specific purity requirements (e.g., 90% TC). Full technical documentation, including MSDS, TDS, COA, is available to support compliance and safety protocols.

CAS: 77-06-5
Synonyms: Gibberellin A3, GA3
Einecs: 201-001-0
Molecular Formula: C19H22O6
Grade: 90% Technical Grade
Package: 1kg Aluminum Foil Bag, 25kg Fiber Drum, or Customized Tablets (5g/10g)

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Product Description

Gibberellic Acid (GA3) is a natural phytohormone that plays a crucial role in regulating plant development. It is extracted through the fermentation of the fungus Gibberella fujikuroi. As a broad-spectrum plant growth regulator, it effectively promotes cell division and elongation.

Our GA3 is widely used in agriculture to stimulate rapid stem and root growth, induce flowering, increase fruit size, and produce seedless fruits (especially in grapes). It is also essential for breaking dormancy in seeds and tubers, ensuring uniform germination rates. The product is suitable for a wide variety of crops including rice, cotton, fruits, vegetables, and flowers.

1 Physicochemical Properties

2 Applications

3 Storage Conditions

4 Safety Precautions

Physicochemical Properties

Parameter	Specification (90% Technical Grade)
Appearance	White to pale yellow crystalline powder
Active Ingredient (GA3)	≥ 90.0%
Melting Point	223°C – 225°C
Loss on Drying	≤ 0.5%
pH Value	2.0 – 4.0 (Acidic)
Residue on Ignition	≤ 0.1%
Specific Optical Rotation	+80° to +90°
Solubility	Soluble in ethanol, methanol, acetone; Slightly soluble in water (Formulations like SP/TB are water-soluble)
Stability	Stable in dry state and acidic solution; Unstable in alkaline solution

Applications

Fruit Enhancement: Used on grapes, citrus, and pears to induce seedless fruit setting, increase fruit size, and prevent fruit drop.
Rice Production: Promotes heading and flowering in hybrid rice seed production, significantly increasing yield.
Dormancy Breaking: Applied to seed potatoes and other seeds to break dormancy and promote early and uniform sprouting.
Vegetable Growth: Promotes stem elongation in celery, spinach, and other leafy vegetables to increase biomass and harvest quality.
Floral Industry: Used to induce flowering in long-day plants and accelerate growth in ornamental plants.
Malting: Accelerates the germination of barley in the brewing industry.

For related plant-growth-regulator raw materials, subject to applicable crop-use registrations, see Naphthalene Acetic Acid and 2-Naphthoxyacetic Acid.

Storage Conditions

Temperature: Store in a cool, dry place. Avoid high temperatures as heat can degrade potency.
Light: Keep away from direct sunlight. The product is light-sensitive.
Container: Keep the original packaging tightly sealed until ready for use.
Shelf Life: 2 years under proper storage conditions.

Safety Precautions

Toxicity: GA3 is a low-toxicity plant growth regulator, generally safe for humans and animals when used as directed.
Handling: Avoid contact with skin and eyes. Do not inhale dust/mist. Wear protective gloves and a mask during application.
Hygiene: Wash hands and exposed skin thoroughly with soap and water after handling.
Restrictions: Do not mix with alkaline pesticides or fertilizers, as GA3 decomposes rapidly in alkaline conditions.

FAQ - Technical & Supply Chain

Q:
What is Gibberellic Acid CAS 77-06-5?

A: Gibberellic acid, also called gibberellin A3 or GA3, is a naturally occurring plant hormone with the formula C19H22O6. It is supplied as a white to pale yellow crystalline powder and used as a plant-growth regulator.
Q:
What are the main agricultural uses of GA3?

A: GA3 is used to break seed dormancy, promote germination, stimulate stem elongation, improve flowering, fruit set and berry sizing, and improve crop uniformity. It is used on crops such as grapes, citrus, rice, vegetables, cotton and flowers.
Q:
Why is Gibberellic Acid used in grape production?

A: In table grapes, GA3 can improve cluster elongation, berry size and fruit set, and support production of seedless or more uniform fruit. Response depends on variety, dose, timing and growing conditions, so local recommendations should be followed.
Q:
How is Gibberellic Acid applied and how soluble is it?

A: GA3 is generally dissolved in a suitable organic solvent or formulated as a water-soluble powder/tablet before dilution into an aqueous spray. The free acid has low water solubility, commonly about 5 g/L at room temperature, so use a formulation or preparation method suited to the target crop and equipment.
Q:
What is the chemical stability of GA3?

A: Dry GA3 is relatively stable, and acidic solutions are more stable than alkaline ones. It degrades under alkaline conditions, and prepared aqueous solutions should normally be used promptly and kept away from prolonged heat or incompatible alkaline materials.
Q:
Which specifications should I check before ordering Gibberellic Acid?

A: Confirm GA3 content, appearance, loss on drying, pH, residue on ignition and any registration or related-impurity requirements. Technical-grade material is often quoted at 90% or higher, while formulation or analytical requirements may need a different purity.

Ordering & Documentation

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