Indole-3-butyric acid

Indole-3-butyric acid structural formula

Indole-3-butyric acid structural formula

Structural formula

Business number 03P1
Molecular formula C12H13NO2
Molecular weight 203

3-Indolylbutyric acid,

4-(indol-3-yl)butyric acid (IUPAC),

Indole-3-butyric acid,

Indolebutyric acid,

3-indolebutyric acid,

4-(3-indolyl)butyric acid,

3-Indolebutyric acid (IBA),

Azindylbutyric acid,

Indolebutyric acid,

Plant Growth Regulator

Numbering system

CAS number:133-32-4

MDL number:MFCD00005664

EINECS number:205-101-5

RTECS number:NL5250000

BRN number:171120

PubChem number:24896067

Physical property data

1. Physical property data

1. Properties: The pure product is a white crystalline solid.

2. Density (g/mL, 25/4℃): Uncertain

3. Relative vapor density (g/mL, air=1): Uncertain

4. Melting point (ºC): 124125

5. Boiling point (ºC, 0.67kpa or 5 mmHg) : Uncertain

6. Refractive index: Uncertain

7. Flash point (ºC): Uncertain

8. Specific rotation (ºC): Uncertain

9. Autoignition point or ignition temperature (ºC) is uncertain

10. Vapor pressure (kPa, 25ºC): <10×10-6


11. Saturated vapor pressure (kPa, 60ºC): Uncertain

12. Heat of combustion (KJ/mol): Uncertain

13. Critical temperature (ºC): 50.3

14. Critical pressure (KPa): Uncertain

15. Log value of oil-water (octanol/water) partition coefficient: Uncertain


16. Explosion upper limit (%, V/V): Uncertain

17. Explosion lower limit (%, V/V): Uncertain

18. Dissolution Properties: Hardly soluble in water, solubility in water is 0.25g/L at 20°C. Easily soluble in benzene and soluble in other organic solvents.

Toxicological data

Acute toxicity data:

Rat oral LD: >500mg/kg

Mouse oral LD50: 100mg/kg

Mouse intraperitoneal cavity LD50: 100mg/kg

Mutation data:

Mold-Aspergillus nidulans gene conversion and mitosis: 1mmol/L

Mold-Aspergillus nidulans sex chromosomes Loss: 1mmol/L

Human leukocytes: 100nmol/L

Ecological data

None yet

Molecular structure data

1. Molar refractive index: 58.90

2. Molar volume (cm3/mol): 162.3

3. Isotonic specific volume (90.2K ): 448.6

4. Surface tension (3.0 dyne/cm): 58.3

5. Polarizability (0.5 10-24cm 3): 23.35

Compute chemical data

1. Hydrophobic parameter calculation reference value (XlogP): 2.3

2. Number of hydrogen bond donors: 2

3. Number of hydrogen bond acceptors: 2

4. Number of rotatable chemical bonds: 4

5. Number of tautomers:

6. Topological molecular polar surface area (TPSA): 53.1

7. Number of heavy atoms: 15

8. Surface charge: 0

9. Complexity: 230

10. Number of isotope atoms: 0

11. Determine the number of atomic stereocenters: 0

12. Uncertain number of atomic stereocenters: 0

13. Determine the number of chemical bond stereocenters Number: 0

14. Number of uncertain chemical bond stereocenters: 0

15. Number of covalent bond units: 1

Properties and stability

None yet

Storage method

None yet

Synthesis method

1. Obtained from the condensation of indole and γ-butyrolactone at the reflux temperature of tetralin. Or by reacting indole with Grignard reagent and α-chloropropionitrile, 3-butyronitrile indole is obtained, which is then hydrolyzed by NaOH and reacted with hydrochloric acid.

2.Add indole, γ-butyrolactone and potassium hydroxide to tetralin, stir and heat to dissolve , reflux and dehydrate, add xylene and hot water to dissolve after slightly cooling, and separate the liquids while hot. After the water layer is cooled, it is neutralized with hydrochloric acid to obtain a crude product, which is then recrystallized with benzene to obtain indolebutyric acid.


1. It is a broad-spectrum indole plant growth regulator and a good rooting agent, which can promote the rooting of herbaceous and woody ornamental plant cuttings. .

2.Plant growth regulator. It is often used for root soaking and transplanting of woody and herbaceous plants, which can accelerate root growth and increase the percentage of plant rooting. It can also be used for seed soaking and seed dressing of plant seeds, which can increase the germination rate and survival rate.

BDMAEE:Bis (2-Dimethylaminoethyl) Ether

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