Indole-3-acetic acid CAS:87-51-4

  • Product Name:Indole-3-acetic acid
  • CAS:87-51-4
  • Molecular formula:C10H9NO2
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Indole-3-acetic acid CAS:87-51-4

Indole-3-acetic acid CAS:87-51-4 Basic information

Product Name: Indole-3-acetic acid
Synonyms: indolyl-aceticaci;Kyselina 3-indolyloctova;kyselina3-indolyloctova;omega-Skatole carboxylic acid;omega-skatolecarboxylicacid;Rhizopon A;Rhizopon A, AA;rhizopona
CAS: 87-51-4
MF: C10H9NO2
MW: 175.18
EINECS: 201-748-2
Product Categories: indole derivative;Indoles and derivatives;Carboxylic Acids;Pyrroles & Indoles;Indole;Organic acids;API intermediates;Indoles;PLANT GROWTH REGULATOR;Auxins;Biochemistry;Plant Growth Regulators;Simple Indoles;Plant Hormones;fertilizer;Agricultural Usage;C
Mol File: 87-51-4.mol

Indole-3-acetic acid CAS:87-51-4 Chemical Properties

density: 1.1999 (rough estimate)
Melting point: 165-169 °C(lit.)
Boiling point: 306.47°C (rough estimate)
form: crystalline
storage temp.: −20°C
Water Solubility: Soluble in ethanol (50 mg/ml), methanol, DMSO, and chloroform (sparingly). Insoluble in water.
refractive index: 1.5460 (estimate)
pka: 4.75(at 25℃)
BRN: 143358
Fp: 171°C
NIST Chemistry Reference: Indole-3-acetic acid(87-51-4)
Merck: 14,4964
Stability: Stable. Incompatible with strong oxidizing agents. Light sensitive.
Sensitive: Light Sensitive
CAS DataBase Reference: 87-51-4(CAS DataBase Reference)
EPA Substance Registry System: Indole-3-acetic acid (87-51-4)

分析项目

SPECIFICATION PROPERTIES

技术指标

STANDARD

实测结果

RESULTS

外观

Appearance

类白色晶体

off-White crystal

类白色晶体

off-White crystal

纯度

Purity%

≥98.0

99.17

灼烧残渣

Ignition residue

≤0.1%

0.04

干燥失重 Loss on drying%

≤0.5%

0.35

熔点 M.P.

166-169

符合

Conforms

Indole-3-acetic acid Usage And Synthesis
Chemical Propertieswhite to tan crystals
UsesPlant growth regulator.
DefinitionChEBI: A monocarboxylic acid that is acetic acid in which one of the methyl hydrogens has been replaced by a 1H-indol-3-yl group.
Biosynthesis3-Indolylacetic acid is biosynthesised in plants from tryptophan by two pathways, the indolylpyruvic acid pathway being quantitatively the more important. Experiments with tomato shoots have shown the existence of a tryptophan transaminase, which catalyses the formation of indolylpyruvic acid, and a tryptophan decarboxylase, which catalyses the formation of tryptamine. The decarboxylation of indolylpyruvic acid is catalysed by indolylpyruvate decarboxylase, while indolylacetaldehyde dehydrogenase catalyses the oxidation of indolylacetaldehyde to indolylacetic acid.
The biosynthesis of 3-indolylacetic acid
Biological Functions3-Indolylacetic acid (indole-3-acetic acid, IAA) is one of the auxins, which together with the gibberellins and abscisic acid, cyto- kinins and ethylene are hormones regulating the growth and development of plants. IAA is a ubiquitous constituent of higher plants and the most important auxin. Some other, non-indolic compounds, including phenyl- acetic acid biosynthesised in plants from phenylalanine, have similar properties and synthetic auxins have also been prepared.
In the plant, IAA conjugates with many compounds, including glucose and other sugars, and with aspartic and glutamic acids. This is probably a way of storing the hormone for future use.
IAA initiates many growth effects in plants, including geotropism and phototropism, development of the ovary, division of cells, enlargement in callus tissue, root formation and apical dominance. When fed to plants, the hormone causes growth up to a maximum, which depends on the type of tissue being fed, and thereafter inhibits further growth, probably through the formation of ethylene, which is growth-inhibitory. Stern tissues tolerate the highest levels of IAA and root tissues the lowest. In the plant, the most active sites of IAA synthesis are the young, expanding leaves.
Agricultural UsesIndoleacetic acid (IAA), synthesized in the plant shoot tips, is a naturally occurring auxin. It is a plant growth promoter.
Purification MethodsRecrystallise heteroauxin from EtOH/water [James & Ware J Phys Chem 89 5450 1985]. [Beilstein 22 III/IV 65.] Alternatively recrystallise 30g of the acid with 10g of charcoal in 1L of hot water, filter and cool when 22g of colourless acid separate. Dry it and store it in a dark bottle away from direct sunlight [Johnson & Jacoby Org Synth Coll Vol V 654 1973]. The picrate has m 178-180o. [Beilstein 22 H 66, 22 I 508, 22 II 50, 22 III/IV 1088.] It is a plant growth substance.


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