HomeProducts

Indole

CAS Number
120-72-9
EC Number
204-420-7
Chemical Formula
C8H7N
Molecular Weight
117.15 g/mol

Description

Indole (CAS 120-72-9 ), also known as 2,3-Benzopyrrole, is a naturally occurring heterocyclic compound sourced from coal tar or produced synthetically for commercial supply. At low concentrations it delivers a floral, jasmine-like character. At higher concentrations it contributes animalic, fecal notes, a dual profile that fragrance and flavor houses actively seek. FEMA 2593 status confirms its recognized standing as a flavoring substance in regulated markets. In fine fragrance and personal care formulations, Indole anchors jasmine, tuberose, and white floral accords. Its odor duality adds naturalistic depth that synthetic alternatives struggle to replicate for high-end perfumery. Flavor manufacturers use it at trace levels in coffee, tobacco, and fruit flavor systems to introduce complexity aligned with naturally occurring profiles. It is essential for creating authentic sensory experiences in food products. In the printing and packaging sector, it serves as an intermediate in the synthesis of certain dyes and pigments, particularly indigo-related colorants. This versatility makes it a staple in industrial chemical manufacturing. Research and specialty chemical producers also consume Indole as a building block for pharmaceutical intermediates and agrochemical synthesis. It is supplied as a white to light tan crystalline solid for various uses. Standard commercial grades include technical and fragrance/flavor-grade material, with purity typically ranging from 98% to 99%+ for flavor and fragrance applications. This ensures consistency across different production batches. Packaging ranges from small drums to bulk quantities to accommodate both specialty formulators and larger industrial buyers. We ensure all materials meet rigorous industry requirements for safety and performance. Contact us for supply of Indole Request Quote

Other Names (Synonyms)

indol | 1H-Indole | 2,3-Benzopyrrole | 1-Benzazole | Ketole | 1-Azaindene

Key Technical Features

  • High Purity Grade standard
  • Consistent Batch Quality
  • Full Regulatory & REACH Support
  • Global Logistics Network enabled

Physical Properties

Melting Point52 °C
Boiling Point128-133 °C @ Press: 28 Torr
Density1 x 10<sup>-6</sup> g/cm³ @ Temp: 25 °C
Flash Point>230 °F
Appearancewhite crystals with an unpleasant odour
ColorWhite to slightly pink
Odorfecal odor, floral in high dilution
FormCrystalline Powder
Water Solubility2.80 g/L (25 ºC)
Vapor Pressure0.016 hPa (25 °C)
Refractive Index1.6300
pH5.9 (1000g/l, H2O, 20℃)
Log P2.14-2.24

Safety & Handling

Danger
GHS05· CorrosiveGHS06· ToxicGHS07· IrritantGHS09· Environment

Hazard Statements

H302Harmful if swallowed
H311Toxic in contact with skin
H318Causes serious eye damage
H319Causes serious eye irritation

Precautionary Statements

P262Do not get in eyes, on skin, or on clothing.
P264Wash … thoroughly after handling.
P270Do not eat, drink or smoke when using this product.
P280Wear protective gloves/protective clothing/eye protection/face protection.
P316Get emergency medical help immediately.
P317Get emergency medical help.
P321Specific treatment (see … on this label).
P330Rinse mouth.
P405Store locked up.
P501Dispose of contents/container in accordance with local regulations.
P265Wash … thoroughly after handling.
P317Get emergency medical help.
P352IF ON SKIN: Wash with plenty of water.
P317If eye irritation persists: Get medical advice/attention. Get emergency medical help.
P364Take off immediately all contaminated clothing and wash it before reuse.
P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

Trade & Regulatory

HS Code29339900
UN Number2811
ADR Class6.1
Packing GroupIII
Storage Class6.1C - Combustible acute toxic Cat.3 toxic compounds or compounds which causing chronic effects
WGK (Germany)1