Indole-3-acetic acid
- CAS No.
- 87-51-4
- Chemical Name:
- Indole-3-acetic acid
- Synonyms
- IAA;INDOLEACETIC ACID;2-(1H-INDOL-3-YL)ACETIC ACID;3-INDOLEACETIC ACID;Gap;Indolylacetic acid;INDOL-3-YLACETIC ACID;HETEROAUXINE;Indoleacetate;indole-3-acetic
- CBNumber:
- CB8783347
- Molecular Formula:
- C10H9NO2
- Molecular Weight:
- 175.18
- MDL Number:
- MFCD00005636
- MOL File:
- 87-51-4.mol
- MSDS File:
- SDS
- TDS File:
- TDS
| Melting point | 165-169 °C (lit.) |
|---|---|
| Boiling point | 306.47°C (rough estimate) |
| Density | 1.1999 (rough estimate) |
| bulk density | 620kg/m3 |
| refractive index | 1.5460 (estimate) |
| Flash point | 171°C |
| storage temp. | -20°C |
| solubility | DMSO:30.0(Max Conc. mg/mL);171.25(Max Conc. mM) |
| pka | 4.75(at 25℃) |
| form | crystalline |
| color | off-white to tan |
| Water Solubility | Soluble in ethanol (50 mg/ml), methanol, DMSO, and chloroform (sparingly). Insoluble in water. |
| Decomposition | 167 ºC |
| Sensitive | Light Sensitive |
| Merck | 14,4964 |
| BRN | 143358 |
| Stability | Stable. Incompatible with strong oxidizing agents. Light sensitive. |
| Major Application |
agriculture environmental |
| Cosmetics Ingredients Functions | SKIN CONDITIONING |
| InChI | 1S/C10H9NO2/c12-10(13)5-7-6-11-9-4-2-1-3-8(7)9/h1-4,6,11H,5H2,(H,12,13) |
| InChIKey | SEOVTRFCIGRIMH-UHFFFAOYSA-N |
| SMILES | OC(=O)Cc1c[nH]c2ccccc12 |
| LogP | 1.410 |
| CAS DataBase Reference | 87-51-4(CAS DataBase Reference) |
| FDA UNII | 6U1S09C61L |
| NIST Chemistry Reference | Indole-3-acetic acid(87-51-4) |
| EPA Substance Registry System | Indole-3-acetic acid (87-51-4) |
| UNSPSC Code | 41116107 |
| NACRES | NA.72 |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |  GHS07 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Signal word | Warning | |||||||||
| Hazard statements | H315-H319-H335 | |||||||||
| Precautionary statements | P261-P280a-P304+P340-P305+P351+P338-P405-P501a | |||||||||
| PPE | Eyeshields, Gloves, type N95 (US) | |||||||||
| Hazard Codes | Xi | |||||||||
| Risk Statements | 36/37/38 | |||||||||
| Safety Statements | 22-24/25 | |||||||||
| WGK Germany | 3 | |||||||||
| RTECS | NL3150000 | |||||||||
| F | 8-10-23 | |||||||||
| Hazard Note | Irritant | |||||||||
| TSCA | TSCA listed | |||||||||
| HS Code | 29339990 | |||||||||
| Storage Class | 11 - Combustible Solids | |||||||||
| Toxicity | LD50 intraperitoneal in mouse: 150mg/kg | |||||||||
| REACH Registrations | Active | |||||||||
| NFPA 704 |
|
Indole-3-acetic acid price More Price(74)
| Manufacturer | Product number | Product description | CAS number | Packaging | Price | Updated | Buy |
|---|---|---|---|---|---|---|---|
| Sigma-Aldrich | I3750 | 3-Indoleacetic acid 98% | 87-51-4 | 5G | $31.3 | 2026-04-30 | Buy |
| Sigma-Aldrich | I3750 | 3-Indoleacetic acid 98% | 87-51-4 | 25g | $112 | 2026-04-30 | Buy |
| Sigma-Aldrich | I3750 | 3-Indoleacetic acid 98% | 87-51-4 | 100g | $283 | 2026-04-30 | Buy |
| Sigma-Aldrich | I2886 | 3-Indoleacetic acid plant cell culture tested, crystalline | 87-51-4 | 5g | $38.8 | 2026-04-30 | Buy |
| Sigma-Aldrich | 45533 | 3-Indoleacetic acid PESTANAL , analytical standard | 87-51-4 | 250mg | $58.2 | 2026-04-30 | Buy |
Indole-3-acetic acid Chemical Properties, Uses, Production
Chemical Properties
white to tan crystals
Uses
Plant growth regulator.
Uses
It is applied as plant growth hormone. is an inducer of plant cell elongation and division shown to cause uncontrolled growth.
Definition
ChEBI: A monocarboxylic acid that is acetic acid in which one of the methyl hydrogens has been replaced by a 1H-indol-3-yl group.
Biosynthesis
3-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 Functions
3-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.
General Description
3-Indoleacetic acid is a highly effective, growth promotor in lower plant life, formed by a variety of fungi, including yeast and has been isolated from Aspergillus niger and Rhizopus sp. It is commonly employed in horticulture and industry.
Agricultural Uses
Indoleacetic acid (IAA), synthesized in the plant shoot tips, is a naturally occurring auxin. It is a plant growth promoter.
storage
Store at -20°C
Purification Methods
Recrystallise 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.
Indole-3-acetic acid Preparation Products And Raw materials
Raw materials
Preparation Products
1of2
| Supplier | Tel | Country | ProdList | Advantage | |
|---|---|---|---|---|---|
| Hubei Harvest chemical Co.,Ltd. | 13277936479 | 2381448056@qq.com | China | 549 | 58 |
| Shanghai Jinshi Biochemical Technology Co., Ltd | 18601717983 18601717983 | 291017736@qq.com | China | 499 | 58 |
| Wuhu NuoweiChemistry Co., Ltd. | 0553-8233716 18055326116 | 2209551708@qq.com | China | 400 | 58 |
| J & K SCIENTIFIC LTD. | 18210857532 18210857532 | jkinfo@jkchemical.com | China | 96815 | 76 |
| Jiangsu Huayu Chemical Co., Ltd. | 25-83241163 | sales@elegantnutri.com | China | 55 | 55 |
| Meryer (Shanghai) Chemical Technology Co., Ltd. | 4006356688 18621169109 | market03@meryer.com | China | 40202 | 62 |
| INTATRADE GmbH | +49 3493/605464 | sales@intatrade.de | Germany | 3563 | 66 |
| future industrial shanghai co., ltd | 400-0066400 13621662912 | sales@jonln.com | China | 1989 | 65 |
| Alfa Aesar | 400-6106006 | saleschina@alfa-asia.com | China | 30103 | 84 |
| TAIYUAN RHF CO.,LTD. | +86 351 7031519 | sales@RHFChem.com | China | 2334 | 56 |
View Latest Price from Indole-3-acetic acid manufacturers
| Image | Update time | Product | Price | Min. Order | Purity | Supply Ability | Manufacturer | |
|---|---|---|---|---|---|---|---|---|
 |
2026-10-14 | Indole-3-acetic acid
87-51-4
|
0.99 | RongNa Biotechnology Co.,Ltd | ||||
 |
2026-10-14 | Indole-3-acetic acid
87-51-4
|
1KG | 98%min | 1000kg/month | WUHAN FORTUNA CHEMICAL CO., LTD | ||
 |
2026-08-12 | Indole-3-acetic acid
87-51-4
|
$125.00 | 1ASSAYS | 98% | 1-20mt | Baoji Guokang Healthchem Co., Ltd. |
-
- Indole-3-acetic acid
87-51-4
- 0.99
- RongNa Biotechnology Co.,Ltd
-
- Indole-3-acetic acid
87-51-4
- 98%min
- WUHAN FORTUNA CHEMICAL CO., LTD
-
- Indole-3-acetic acid
87-51-4
- $125.00
- 98%
- Baoji Guokang Healthchem Co., Ltd.
