gibberellic acid
90%tech,10%tablet,
Plant growth regulator
gibberellins
NOMENCLATURE
Common name gibberellic acid (BSI, draft E-ISO, accepted in lieu of a common name); acide gibbérellique (draft F-ISO)
IUPAC name (3S,3aS,4S,4aS,7S,9aR,9bR,12S)-7,12-dihydroxy-3-methyl-6-methylene-2-oxoperhydro-4a,7-methano-9b,3-propeno[1,2-b]furan-4-carboxylic acid
Alt: (3S,3aR,4S,4aS,6S,8aR,8bR,11S)-6,11-dihydroxy-3-methyl-12-methylene-2-oxo-4a,6-ethano-3,8b-prop-1-enoperhydroindeno[1,2-b]furan-4-carboxylic acid
Chemical Abstracts name (1a,2b,4aa,4bb,10b)-2,4a,7-trihydroxy-1-methyl-8-methylenegibb-3-ene-1,10-dicarboxylic acid 1,4a-lactone
Other names gibberellin A3; GA3 (ambiguous) CAS RN [77-06-5]
PHYSICAL CHEMISTRY
Mol. wt. 346.4 M.f. C19H22O6 Form Crystalline solid. M.p. 223-225 ºC (decomp.) Solubility In water 5 g/l (room temperature). Soluble in methanol, ethanol, acetone, and aqueous alkalis; slightly soluble in diethyl ether and ethyl acetate. Insoluble in chloroform. Potassium, sodium, and ammonium salts: Readily soluble in water (potassium salt 50 g/l). Stability Dry gibberellic acid is stable at room temperature, but slowly undergoes hydrolysis in aqueous or aqueous-alcoholic solutions, DT50 (20 ºC) c. 14 d (pH 3-4), 14 d (pH 7). In alkalis, undergoes a rearrangement to less biologically-active compounds. Decomposed by heat. pKa 4.0
APPLICATIONS
Mode of action Acts as a plant growth regulator on account of its physiological and morphological effects in extremely low concentrations. Translocated. Generally affects only the plant parts above the soil surface. Uses Has a variety of applications, e.g. to improve fruit setting of clementines and pears (especially William pears); to loosen and elongate clusters and increase berry size in grapes; to control fruit maturity by delaying development of the yellow colour in lemons; to reduce rind stain and retard rind ageing in navel oranges; to counteract the effects of cherry yellows virus diseases in sour cherries; to produce uniform seedling growth in rice; to promote elongation of winter celery crop; to induce uniform bolting and increase seed production in lettuce for seed; to break dormancy and stimulate sprouting in seed potatoes; to extend the picking season by hastening maturity in artichokes; to increase the yield in forced rhubarb; to increase the malting quality of barley; to produce brighter-coloured, firmer fruit, and to increase the size of sweet cherries; to increase yields and aid harvesting of hops; to reduce internal browning and increase yields of Italian prunes; to increase fruit set and yields of tangelos and tangerines; to improve fruit setting in blueberries; to advance flowering and increase the yield of strawberries; and also a variety of applications on ornamentals. Application rates up to 80 g/a per application, depending on desired effect. Formulation types EC; SG; SP; TB; Crystals. Compatibility Incompatible with alkaline materials and solutions containing chlorine.
CERTIFICATE OF ANALYS:
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product name: |
gibberellic acid 90% tech |
gibberellic acid 20% tablet |
gibberellic acid 10% tablet |
|
a.i. content: |
90.15% |
20.15% |
10.05% |
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loss at heat: |
0.10% |
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|
|
heavy metal: |
0.00% |
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|
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apperance: |
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white or almost white tablets |
white tablets |
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tablet weight: |
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5.09 |
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ph value: |
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6.1 |
6.6 |
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dissolving time: |
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9(min) |
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solubility and stablity: |
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0.3%(after 5 min) |
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(pass 75 u m test sieve) |
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0(after 18 hour) |
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test in wet sieve: |
|
99.80% |
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bubble up atter a minute: |
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2/ml |
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powder and debris: |
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0.04% |
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water: |
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|
2.40% |
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water insoluble: |
|
|
0.27% |
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crumple time: |
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10(min) |
