Gibberellic Acid
Category: Agrochemicals  Publish Time: 2011-10-09 13:16 
Gibberellic acid is a simple gibberellin, promoting growth and elongation of cells. It affects decomposition of plants and helps plants grow if used in small amounts, but eventually plants develop tolerance for it. Gibberellins have a number of effects on plant development. They can: 1) stimulate rapid stem and root growth, 2) induce mitotic division in the leaves of some plants, 3) increase seed germination rate. Gibberellic acid is sometimes used in laboratory and greenhouse settings to trigger germination in seeds that would otherwise remain dormant. It is also widely used in the grape-growing industry as a hormone to induce the production of larger bundles and bigger grapes, especially Thompson seedless grapes, and in the Okanagan and Creston Valley it is used in the cherry industry as a growth regulator.

 

CAS NO.:
77-06-5

Chemical Structure:
 

 

Chemical Formula:
C19H22O6
Molar Mass:
346.37 g/mol

Synonyms:

920, Gibberellin A3; Gibberellin; GA3, ACIDE GIBBERELLIQUE , ACTIVOL GA, BERELEX, BRELLIN, CEKUGIB,,GA3,GIBB-3-ENE-1,10-DICARBOXYLIC ACID, 2,4A,7-TRIHYDROXY-1-METHYL-8-METHYLENE-, 1,4A-LACTONE, (+)-GIBBERELLIC ACID, GIBBERELLIN A3,GIBBERELLIN A3, GIBBERELLIN X, GIBRESCOL, GIB-SOL, GIB-TABS,GROCEL, MAXON (PLANT GROWTH REGULATOR), NCI-C55823, PRO-GIBB,RALEX, RELEASE LC, RYZUP, 2,4A,7-TRIHYDROXY-1-METHYL-8-METHYLENEGIBB-3-ENE-1,10-DICARBOXYLIC ACID 1,4A-LACTONE

Physio-chemical Properties

White crystalline and odorless Powder; soluble in methyl alcohol, ethanol, acetone and ethyl acetate; practically insoluble in kerosene,chloroform, ether, benzene and water; stable under acidic conditions and degradable when mixed with basic substances

Melting point: 233 - 235 °C (decomposition)

Solubility in water: 5 g/l (20 °C)

Hazards

EU classification

Irritant (Xi)

R-phrases R36

S-phrases R26, S36
Specification:

Active Ingredients: Min. 90%; Min. 93%

Gibberellic acid 90%

Gibberellic acid 10% tablet

Gibbberellic acid 20% tablet

Gibberellic acid 10%/20% soluble powder

Gibberellic Acid 85%, 90%, 93%, 95% TC

Gibberellic Acid 2%, 4% EC

Gibberellic Acid 10%, 20% Soluble Tablet

Gibberellin Paste 2.7%

Gibberellic Acid 10%, 20% Soluble Powder

Apple Caretaker 3.6% GA4/A7+6BA

GA4+7 90% TC

4% S.L.(Pro-Gibb 4%, can be applied at 1.2 liters (2.54 pts) Pro-Gibb per 100 gallons water, approximately 10 to 14)

Application Sites & Compatibility

Corn, small grains, grain sorghum, asparagus, sugarcane, pastures, rangeland and agricultural seed crops, no crop sites, forest lands, lawns and ornamental turf.

Compatible with most other herbicides.

Mode of Action:

Gibberellic Acid-3 (GA-3) is a naturally occurring plant growth regulator (hormone) that may cause a variety of effects, including the stimulation of seed germination in some cases.GA-3 occurs naturally in the seeds of many species and is produced commercially by growing Gibberella fujikuroi fungus cultures in vats, then extracting and purifying the GA-3.Presoaking seeds in GA-3 solution will in many cases cause the rapid germination of many types of highly dormant seeds which would otherwise need cold treatment, after-ripening, aging, or other prolonged pre-treatments.

Gibberellic acid is a simple gibberellin, a tetracyclic diterpene acid promoting growth and elongation of cells. It affects decomposition of plants and helps plants grow if used in small amounts, but eventually plants develop tolerance for it. Gibberellic acid stimulates the cells of germinating seeds to produce mRNA molecules that code for hydrolytic enzymes. Gibberellic acid is a very potent hormone whose natural occurrence in plants controls their development. Since GA regulates growth, applications of very low concentrations can have a profound effect while too much will have the opposite effect.
Usage

It is usually used in concentrations between 0.01-10 mg/L.Gibberellins are used in agriculture for various purposes. GA-3 is sprayed on seedless grapes to increase grape size and yield, and is used on navel oranges, lemons, blueberries, sweet and tart cherries, artichokes and other crops to decrease or increase fruit set, delay rind aging, etc. These effects are highly dependent on concentration and stage of plant growth.
Caution:

1. It is readily degradable in basic substances and un-degradable under dry conditions. Its aqueous solution will become ineffective at 5 degree Celcius.

2. The pure product has low water solubility. Dissolve with a little ethanol before use.

3. The GA3-treated cottonseed should not be kept for further sowing.

4. It should be kept at low temperature and at a dry place and prevented from strong light irritation and constant heating.
Packing:

1 Kg or 5 Kg in one Aluminum Tin; 10 Kgs per carton
Storage:

Kept in a well-closed container, protected from light and stored in a dry place.

Shelf Life:

2 Years when stored below
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