Description

Indole-3-Butyric Acid (IBA) (4-(1H-indol-3-yl)butanoic acid) is a highly effective plant growth regulator belonging to the auxin class of phytohormones. With the molecular formula C₁₂H₁₃NO₂ and CAS number 133-32-4, this white to off-white crystalline powder is widely used in plant tissue culture, horticulture, and agriculture to stimulate root formation in cuttings and enhance plant propagation. IBA is soluble in organic solvents such as ethanol, acetone, and dimethyl sulfoxide (DMSO), but has limited solubility in water. It is available in high-purity grades (>98%) suitable for laboratory research, commercial plant production, and formulation into rooting powders or solutions. Proper storage at 2-8°C in a tightly sealed container is recommended to maintain stability.

Properties

• CAS Number: 133-32-4
• Complexity: 230
• IUPAC Name: 4-(1H-indol-3-yl)butanoic acid
• InChI: InChI=1S/C12H13NO2/c14-12(15)7-3-4-9-8-13-11-6-2-1-5-10(9)11/h1-2,5-6,8,13H,3-4,7H2,(H,14,15)
• InChI Key: JTEDVYBZBROSJT-UHFFFAOYSA-N
• Exact Mass: 203.094628657
• Molecular Formula: C12H13NO2
• Molecular Weight: 203.24
• SMILES: C1=CC=C2C(=C1)C(=CN2)CCCC(=O)O
• Topological: 53.1
• Monoisotopic Mass: 203.094628657
• Physical Description: White or slightly yellow solid; Off-white powder;
• Color/Form: White to slightly yellow crystals
• Odor: Essentially odorless
• Vapor Pressure: 0.00000117 [mmHg]
• Henry’s Law Constant: Henry’s Law constant: 1.3X10-11 atm cu m/mol@ 25 °C /Estimated/
• Stability/Shelf Life: Very stable in neutral, acidic and alkaline media.
• Dissociation Constants: pKa = 4.7 /Estimated/
• Synonyms: Indole-3-butyric acid, 133-32-4, 3-Indolebutyric acid, 4-(1H-Indol-3-yl)butanoic acid, Indolebutyric acid, Hormodin, Seradix, 1H-INDOLE-3-BUTANOIC ACID, 4-(3-Indolyl)butyric acid, Jiffy grow, 4-indol-3-ylbutyric acid, Indole-3-butanoic acid, Indolbutyric acid, Seradix 2, Seradix 3, 4-(Indol-3-yl)butyric acid, 1H-Indole-3-butyric acid, Seradix B 2, Seradix B 3, Rhizopon AA, beta-Indolebutyric acid, Indole butyric acid, Butyric acid, 4-(indolyl)-, Indol-3,4′-yl butyric acid, Caswell No. 499, 3-Indolyl-gamma-butyric acid, CCRIS 1020, HSDB 7214, NSC 3130, EPA Pesticide Chemical Code 046701, CHEBI:33070, AI3-17434, EINECS 205-101-5, 4-Indol-3-ylbutyric acid [BSI:ISO], BRN 0171120, Kyselina 4-indol-3-ylmaselina, Kyselina 4-indol-3-ylmaselina [Czech], 061SKE27JP, DTXSID8032623, NSC-3130, 1H-Indole-3-butanoic acid (9CI), INDOLEBUTYRIC ACID [MI], DTXCID6012623, 5-22-03-00140 (Beilstein Handbook Reference), 4-INDOL-3-YLBUTYRIC ACID [ISO], 4-INDOL-3-YLBUTYRIC ACID [HSDB], 3Indolebutyric acid, Indole3butanoic acid, betaIndolebutyric acid, 1HIndole3butyric acid, 1HIndole3butanoic acid, 3Indolylgammabutyric acid, 4(Indol3yl)butyric acid, Kyselina 4indol3ylmaselina, Butyric acid, 4(indolyl), Indol3,4’yl butyric acid, 1HIndole3butanoic acid (9CI), USEPA/OPP Pesticide Code: 046701, nsc3130, IBA, 3-Indolylbutyric acid, 3-Indolebutyric acid (IBA), 3-Indolebutyricacid, 933-32-4, 4-(3-Indolyl)butanoic acid, Indole 3-butyric acid, Indolyl-3-butyric acid, 3-Indolebutyrate, .beta.-IBA, 3-Indole butyric acid, 4-(1H-Indol-3-yl)butyric acid, 4-(1H-Indol-3-yl)-butyric acid, MFCD00005664, .beta.-Indolebutyric acid, 4-indol-3-ylbutanoic acid, 3-Indolyl-.gamma.-butyric acid, .gamma.-(3-Indolyl)butyric acid, .gamma.-(Indole-3)-butyric acid, .gamma.-(Indol-3-yl)butyric acid, 1H-Indole-3-butyrate, beta-Indolylbutyric acid, 1H-Indole-3-butanoate, F0919-1266, 4-(3-Indolyl)butyric acid 100 microg/mL in Acetonitrile, gamma-(Indol-3-Yl)butyric acid, 3IB, SR-01000477768, UNII-061SKE27JP, Indolebutyrate, Chryzopon, Chryzosan, Chryzotek, Oxyberon, Hormex, b-Indolebutyrate, 3-Iodolebutyrate, 3-Indole butyrate, beta-Indolebutyrate, Indole 3-butyrate, Indole-3 Butyrate, Indolyl-3-butyrate, Indole-3-Butrylate, b-Indolebutyric acid, 3-indolebutyric-acid, 3-Indolybutyric acid, 4-indol-3-ylbutyrate, Indole-3 Butyric acid, Indole-3-Butrylic acid, 4-(indolyl)- butyrate, Enamine_005659, 4-(3-Indolyl)butyrate, 4-(3-Indole)-butyrate, 4-(Indol-3-yl)butyrate, .gamma.-Indolebutyric acid, 4-Indol-3-ylbutyric-acid, CBKinase1_000084, CBKinase1_012484, 4-(3-Indole)butyric acid, 4-(indolyl)- butyric acid, 4-(Indol-3)-butyric acid, 4-(3-1H-Indolyl)butyrate, Oprea1_093618, Oprea1_136608, SCHEMBL35884, 3-Indolebutyric acid, 98%, 4-(3-Indole)-butyric acid, CBDivE_001082, MLS006011821, 4-(3-Indolyl)-butyric acid, WLN: T56 BMJ D3VQ, .gamma.-Indole-3-butyric acid, CHEMBL582878, gamma-(Indole-3)-butyric acid, Indole-3-butyric acid (8CI), 4-(1H-Indol-3-yl)-butyrate, 4-(3-1H-Indolyl)butyric acid, HMS1410B05, HMS3604N19, HMS3655J16, SMSSF-0062427, ALBB-005980, BCP00909, HY-N0186, STR04308, Tox21_301287, BBL000073, BDBM50129081, s2253, SBB028533, STK246981, 4-(1H-Indol-3-yl)butanoic acid #, [3-(3-Indolyl)propyl]carboxylic acid, AKOS000273851, AC-2855, BCP9000128, CCG-110315, CG-0518, CS-6288, DB02740, FI07798, SB15075, IDI1_007894, NCGC00164296-01, NCGC00164296-02, NCGC00164296-03, NCGC00164296-05, NCGC00257530-01, CAS-133-32-4, SMR001252209, ST011964, Indole-3-butyric acid, >=99.0% (T), DB-011205, I0026, NS00009538, SW219851-1, EN300-16684, D78109, AB00375585-03, Q2622539, SR-01000477768-1, SR-01000477768-3, BRD-K43187796-001-02-3, BRD-K43187796-237-01-5, Z56754864, Indole-3-butyric acid, PESTANAL(R), analytical standard, 67085FE2-19DF-4524-B354-17BD9781B318, Indole-3-butyric acid, plant cell culture tested, BioReagent

Application

Indole-3-Butyric Acid is primarily used as a rooting hormone to promote adventitious root development in plant cuttings, including woody ornamentals and difficult-to-root species. It is applied as a powder, liquid dip, or foliar spray in horticulture and nursery operations. Researchers utilize IBA to study auxin-mediated plant developmental processes such as cell elongation, vascular differentiation, and apical dominance. The compound is also employed in plant tissue culture media to induce callus formation and somatic embryogenesis.

Safety and Hazards

GHS Hazard Statements

• H301: Toxic if swallowed [Danger Acute toxicity, oral]
• H402: Harmful to aquatic life [Hazardous to the aquatic environment, acute hazard]
• H412: Harmful to aquatic life with long lasting effects [Hazardous to the aquatic environment, long-term hazard]

Precautionary Statements

• P264, P270, P273, P301+P316, P321, P330, P405, and P501

Hazard Classes and Categories

• Acute Tox. 3 (98%)
• Skin Irrit. 2 (95.9%)
• Eye Irrit. 2 (67.3%)
• STOT SE 3 (65.3%)

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Disclaimer: Sold exclusively for laboratory research. Prohibited for commercial use, diagnostics, or human/animal applications. Buyers assume all compliance liability.