4-indol-3-ylbutyric acid
Plant growth regulator
auxin
NOMENCLATURE
Common name 4-indol-3-ylbutyric acid (draft BSI, ISO-E, accepted in lieu of a common name)
IUPAC name 4-(indol-3-yl)butyric acid
Chemical Abstracts name 1H-indole-3-butanoic acid
Other names IBA CAS RN [133-32-4]
PHYSICAL CHEMISTRY
Mol. wt. 203.2 M.f. C12H13NO2 Form Colourless to pale yellow crystals. M.p. 123-125 ºC V.p. <0.01 mPa (25 ºC) Solubility In water 250 mg/l (20 ºC). In benzene >1000, acetone, ethanol, and diethyl ether 30-100, chloroform 0.01-0.1 (all in g/l). Stability Very stable in neutral, acidic and alkaline media. F.p. Non-flammable
COMMERCIALISATION
History The ability of the acid and its simple esters to stimulate root formation in cuttings reported by P. W. Zimmerman & F. Wilcoxon (Contrib. Boyce Thompson Inst., 1935, 7, 209) and by P. W. Zimmerman & A. E. Hitchcock (ibid., p. 439). Introduced by Union Carbide Corp. and by May & Baker Ltd (both now Bayer CropScience). Patents US 3051723 Manufacturers Bayer CropScience; Cyclo
APPLICATIONS
Mode of action Plant growth regulator which acts on cell division and cell elongation. Uses Used to stimulate rooting of cuttings of herbaceous and woody ornamentals. Formulation types DP. Selected products: 'Seradix' (Bayer CropScience); mixtures: 'Boll-Set' (+ gibberellic acid) (Micro Flo); 'PGR-IV' (+ gibberellic acid) (Marman, Micro Flo)
OTHER PRODUCTS
'Chryzoplus' (Rhizopon, Fargro); 'Chryzopon' (Rhizopon, Fargro); 'Chryzosan' (Rhizopon, Fargro); 'Chryzotek' (Rhizopon, Fargro); 'Chryzotop' (Rhizopon, Fargro); 'Rhizopon AA' (Rhizopon, Fargro) mixtures: 'Cytoplex HMS' (+ gibberellic acid+ kinetin) (Plant BioTech); 'Early Harvest' (+ cytokinins+ gibberellic acid) (Griffin); 'Foli-Zyme GA' (+ cytokinins+ gibberellic acid) (Stoller); 'Maxon II' (+ gibberellic acid) (Agriliance); 'Super Lagniappe' (+ cytokinins+ gibberellic acid) (Agriliance); 'Synergol' (+ dichlorophen+ 1-naphthylacetic acid) (Hortichem) Discontinued products: 'Rootone' * (Rhône-Poulenc) mixtures: 'Mepex Plus-CP' * (+ cytokinins+ gibberellic acid+ mepiquat chloride) (Griffin)
ANALYSIS
By hplc. Details available from Bayer CropScience.
MAMMALIAN TOXICOLOGY
Oral Acute oral LD50 for mice 100 mg/kg. Other Acute i.p. LD50 for mice 100 mg/kg (H. H. Anderson et al., Proc. Soc. Exp. Biol. Med., 1936, 34, 138). Toxicity class EPA (formulation) III
ECOTOXICOLOGY
Bees Not toxic to bees.
ENVIRONMENTAL FATE
Soil/Environment Rapidly degraded in soil.
|