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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HCID 10328Generated: October 23, 2026

Indoline

2,3-DIHYDROINDOLE · Dihydroindole · 2,3-DIHYDRO-1H-INDOLE · 1H-Indole, 2,3-dihydro- · IDN · NDOLINE · INDOLINE · 1-Azaindan

https://huagongshe.com/en/chemical/10328

Indoline molecular structure

Identifiers & Physical Properties

CAS No.496-15-1
Molecular formulaC8H9N
Average molar mass119.16 g/mol
Monoisotopic mass119.07349929 g/mol
SMILESc1ccc2c(c1)CCN2
InChIKeyLPAGFVYQRIESJQ-UHFFFAOYSA-N
PubChem CID10328
ChEMBLCHEMBL388803
ChEBICHEBI:43295
EC No.207-816-8
DTXSIDDTXSID9052133

Chemical & Physical Properties

XLogP1.9
Topological polar surface area12
Hydrogen bond donors1
Hydrogen bond acceptors1
Rotatable bonds0
Heavy atoms9
Formal charge0
Complexity101
Chemical classesNitrogen Compounds -> IndolesDye
SpringerMaterials Properties15N nuclear magnetic resonance spectrum
Physical DescriptionBrown liquid[Alfa Aesar MSDS]
Collision Cross Section120.8 Ų [M+H]+ [CCS Type: DTBuffer gas: N2Ionization: APCI+Dataset: TOXCASTSource Identifier: DTXSID9052133]
Melting point-21 °C
Boiling point220-221 °C (lit.)
Density1.063 g/mL at 25 °C (lit.)
Refractive indexn20/D 1.592(lit.)
Flash point199 °F
Storage conditionsKeep in dark place,Sealed in dry,Room Temperature
Solubility5g/llnsoluble in water, soluble in alcohol and oils. Poorly soluble in Propylene glycol.5 g/L (20 ºC)
pKa (acidity coefficient)5.20±0.20(Predicted)
Physical stateliquid (clear)
Colorclear dark brown
Odora mild, delicate, but extremely tenacious floral odor
SensitivityLight Sensitive
BRN111915
InChI1S/C8H9N/c1-2-4-8-7(3-1)5-6-9-8/h1-4,9H,5-6H2
InChIKeyLPAGFVYQRIESJQ-UHFFFAOYSA-N
SMILESC1Cc2ccccc2N1
CAS DataBase Reference496-15-1(CAS DataBase Reference)
EWG's Food Scores1
FDA UNII6DPT9AB2NK
NIST Chemistry Reference1H-Indole, 2,3-dihydro-(496-15-1)
EPA Substance Registry System1H-Indole, 2,3-dihydro- (496-15-1)
UNSPSC Code12352100
NACRESNA.22
GHS pictogramGHS07
Signal wordWarning
GHS hazard statementsH227-H302-H315-H319-H335
GHS precautionary statementsP210e-P261-P280a-P305+P351+P338-P405-P501a
Hazard symbolsXi
Risk statements (R)36/37/38
Safety statements (S)23-24/25-37/39-26
Water hazard class (WGK)3
RTECS numberNL6906300
Hazard NoteIrritant
TSCA inventory statusTSCA listed
Customs code29339990
Storage class10 - Combustible liquids

Safety & Regulations

GHS classificationThis chemical does not meet GHS hazard criteria for 18.2% (2 of 11) of reports.WarningH302 (54.5%): Harmful if swallowed [Warning Acute toxicity, oral]P261, P264, P264+P265, P270, P271, P280, P301+P317, P302+P352, P304+P340, P305+P351+P338, P319, P321, P330, P332+P317, P337+P317, P362+P364, P403+P233, P405, and P501 (click each P-code to see the statement)Aggregated GHS information provided per 11 reports by companies from 7 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.
Regulatory informationChemical: 1H-Indole, 2,3-dihydro-1H-Indole, 2,3-dihydro-: Does not have an individual approval but may be used under an appropriate group standard
Hazards summaryA skin and strong eye irritantToxic by ingestion[Alfa Aesar MSDS] See Indole.
Hazard Classes and CategoriesAcute Tox. 4 (54.5%)
Water hazard class (WGK)3
TSCA inventory statusTSCA listed
RTECS numberNL6906300
Customs code29339990
Risk statements (R)36/37/38
Signal wordWarning
GHS pictogramGHS07
Hazard symbolsXi
hazard_noteIrritant
Safety statements (S)23-24/25-37/39-26
Storage class10 - Combustible liquids
GHS hazard statementsH227-H302-H315-H319-H335
GHS precautionary statementsP210e-P261-P280a-P305+P351+P338-P405-P501a

Applications & Uses

Uses

Indole is used in perfumery and in preparing tryptophan, one of the 20 amino acids commonly found in animal proteins. It has important application in the industry of plant growth. It is used to prepare indoleacetic acid (auxin) and other plant growth substances which help the development of roots in plant. Indole and its derivatives are widely used in making perfumes, dyes, agrochemicals and medicines.

Uses

Reactant for preparation of:Inhibitors of NOD1-Induced Nuclear Factor-κB ActivationSphingosine-1-phosphate 4(S1P4) receptor antagonistsCytotoxic cell cycle inhibitors2-AminopyridinesPET agent for imaging of protein kinase C (PKC)Sodium-dependent glucose co-transporter 2 (SGLT2) inhibitors for the management of hyperglycemia in diabetesα4β2-Nicotinic acetylcholine receptor-selective partial agonistsmGlu4 positive allosteric modulatorsBacterial biofilm inhibitorsSerotonin 5-HT6 receptor antagonists

Uses

As an indole derivative, Indoline can be used in the preparation of various medicinal compounds such as potential α1-adrenoceptor (α1-AR) antagonists.