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Indole120-72-9C8H7N

Name: Indole120-72-9C8H7N
Brand: OORENT
SKU: pr2609111864
Price: 33 USD
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CAS No.:

120-72-9

Grade:

Pharmaceutical Grade

Content:

99.5%

Port:

shanghai

Brand:

OORENT

Packaging:

Vial/Bottle/Bag/Carton

Price valid (until):

2026-10-11

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Description

Product Detail

Indole Basic information

description Content analysis Control of Bacterial Processes Toxicity Utilization limitation Chemical property Uses

Product Name:	Indole
Synonyms:	INDOLE;BENZO(B)PYRROLE;IndoleGr;2,3-Benzopyrrole,OrBenzazole,Indole;INDOLE CRYSTALLINE GR;Indole-UL-13C8, 15N;indole,2,3-benzopyrrole,1-benzazole;indole solution
CAS:	120-72-9
MF:	C8H7N
MW:	117.15
EINECS:	204-420-7
Product Categories:	Heterocycle-Indole series;Aromatics;Heterocycles;Building Blocks;C7 to C9;Chemical Synthesis;Citrus aurantium (Seville orange);Heterocyclic Building Blocks;Nutrition Research;Phytochemicals by Plant (Food/Spice/Herb);E-LAnalytical Standards;IInternational Standards;Single Component Standards for MISA Analyses;Volatiles/ Semivolatiles;Organohalides;Organoborons;Boronic ester;Indoles;Simple Indoles;Pyrroles & Indoles;Alpha Sort;Alphabetic;Canada;Pyrroles & Indoles;Indole;bc0001;120-72-9;1
Mol File:	120-72-9.mol

Indole Chemical Properties

Melting point	51-54 °C (lit.)
Boiling point	253-254 °C (lit.)
density	1.22
bulk density	230kg/m3
vapor pressure	0.016 hPa (25 °C)
FEMA	2593 \| INDOLE
refractive index	1.6300
Fp	>230 °F
storage temp.	2-8°C
solubility	methanol: 0.1 g/mL, clear
form	Crystalline Powder
pka	3.17 (quoted, Sangster, 1989)
color	White to slightly pink
PH	5.9 (1000g/l, H2O, 20℃)
Odor	fecal odor, floral in high dilution
Odor Threshold	0.0003ppm
biological source	synthetic
Odor Type	animal
Water Solubility	2.80 g/L (25 ºC)
Sensitive	Light Sensitive
Merck	14,4963
JECFA Number	1301
BRN	107693
Henry's Law Constant	1.9×10¹ mol/(m³Pa) at 25℃, Duchowicz et al. (2020)
Stability:	Stable, but may be light or air sensitive. Incompatible with strong oxidizing agents, iron and iron salts.
Cosmetics Ingredients Functions	PERFUMING
InChI	1S/C8H7N/c1-2-4-8-7(3-1)5-6-9-8/h1-6,9H
InChIKey	SIKJAQJRHWYJAI-UHFFFAOYSA-N
SMILES	c1ccc2[nH]ccc2c1
LogP	2.14-2.24
CAS DataBase Reference	120-72-9(CAS DataBase Reference)
NIST Chemistry Reference	Indole(120-72-9)
EPA Substance Registry System	Indole (120-72-9)

Safety Information

Hazard Codes	Xn,N,T
Risk Statements	21/22-37/38-41-50/53-36-39/23/24/25-23/24/25-52/53
Safety Statements	26-36/37/39-60-61-45-36/37
RIDADR	UN 2811 6.1/PG 3
WGK Germany	1
RTECS	NL2450000
F	8-13
TSCA	TSCA listed
HS Code	2933 99 20
HazardClass	9
PackingGroup	III
Storage Class	6.1C - Combustible acute toxic Cat.3 toxic compounds or compounds which causing chronic effects
Hazard Classifications	Acute Tox. 3 Dermal Acute Tox. 4 Oral Aquatic Acute 1 Eye Irrit. 2
Hazardous Substances Data	120-72-9(Hazardous Substances Data)
Toxicity	LD50 orally in rats: 1 g/kg (Smyth)

MSDS Information

Provider	Language
ACROS	English
SigmaAldrich	English
ALFA	English

Indole Usage And Synthesis

description	Indole, also called Benzopyrrole, an aromatic heterocyclic organic compound occurring in some flower oils, such as jasmine and orange blossom, in coal tar, and in fecal matter. It has a bicyclic structure, consisting of a six-membered benzene ring fused to a five-membered nitrogen-containing pyrrole ring. It can be produced by bacteria as a degradation product of the amino acid tryptophan. It occurs naturally in human feces and has an intense fecal smell. This off flavour occurs in beer due to contaminant coliform bacteria during the primary fermentation stage of beer brewing. At very low concentrations, however, it has a flowery smell, and is a constituent of many flower scents (such as orange blossoms) and perfumes. Natural jasmine oil, used in the perfume industry, contains around 2.5% of indole. Indole also occurs in coal tar. The participation of the nitrogen lone electron pair in the aromatic ring means that indole is not a base, and it does not behave like a simple amine. Indoles are important precursors for other substances made within the human body and are, therefore, researched and used in lifestyle and medical applications. The compound was officially discovered in 1866 by a scientist working with the properties of zinc dust who reduced oxindole from the zinc dust into an indole. After the discovery, indoles became important constituents of the textile industry, and as more research was conducted, the larger role that indoles played within the human body system was realized. The indolic nucleus in substances like tryptophan and auxin has led to a better understanding of their mechanism within the body.
Content analysis	Press GT-10-4 gas chromatography method for the determination with polar column. Using the polar column method in GT-10-4 gas chromatography to determine the content of indole.
Control of Bacterial Processes	As an intercellular signal molecule in both gram-positive and gram-negative bacteria, indole regulates various aspects of bacterial physiology, including spore formation, plasmid stability, resistance to drugs, biofilm formation, and virulence. Indole has been shown to control a number of bacterial processes such as spore formation, plasmid stability, drug resistance, biofilm formation, and virulence. Indole may have anticarcinogenic activity. Commonly synthesized from phenylhydrazine and pyruvic acid, although several other procedures have been discovered, indole also can be produced by bacteria as a degradation product of the amino acid tryptophan.
Toxicity	GRAS(FEMA)。 LD50 1000 mg/kg(test with rat orally).
Utilization limitation	FEMAmg/kg：soft drinks:0.26；cold drinks:0.28；candy:0.50；bakery product :0.58；pudding:0.02～0.40. Moderate limit (FDA§172．515，2000)
Chemical property	It is the shiny flaky white crystals, and would turn into dark colors when it exposed to light. There would be a strong unpleasant odor with high concentration of indole, but the flavor would change into oranges and jasmine after highly diluted (concentration <0.1%). It has the melting point of 52~53 ℃ and the boiling point of 253~254 ℃. It is soluble in alcohol, ether, hot water, propylene glycol, petroleum ether and most of the non-volatile oil, insoluble in glycerin and mineral oil. Natural indole are widely contained in neroli oil, orange oil, lemon oil, lime oil, citrus oil, peel oil, jasmine oil and other essential oil.
Uses	(1) According to the GB 27 60-96 , indole can be used as flavouring agent and mainly used for preparing the essence of cheese, citrus, coffee, nuts, grape, strawberry, raspberry, chocolate, assorted fruit, jasmine and lily etc. (2) It can be used as the reagent for the determination of nitrite, can also used in the manufacture of perfume and medicine. (3) It can be used as the raw material of perfume, pharmaceuticals and plant growth hormone. (4) Indole is the intermediate for the indole acetic acid and indole butyric acid.The indole acetic acid and indole butyric are plant growth regulator. (5) It can be widely used in the manufacture of the essences of jasmine, lilac, orange blossom, gardenia, honeysuckle, lotus, narcissus, ylang, orchid and prynne etc. It is usually combined with the methyl indole to imitate the artificial civet. The extremely few of the indole can be used in chocolate, raspberry, strawberry, bitter orange, coffee, nuts, cheese, grapes and fruit and other fruity essential oil. (6) Indole is mainly used as spices, dyes, amino acids and the raw materials of pesticide. Indole itself is a spice commonly used in producing the essences of jasmine, lilac, lotus flowers, orchids and other flower flavor. The usage is generally in a few thousandths. (7) It can be used for verifying the gold, potassium and nitrite and manufacturing jasmine-type fragrance. It can also be used in pharmaceutical industry.
Description	Indole has an almost floral odor when highly purified. Otherwise, it exhibits the characteristic odor of feces. It is not very stable on exposure to light (turns red). Indole may be obtained from the 220 - 260°C boiling fraction of coal tar or by heating sodium phenylglycine-o-carboxylate with NaOH, saturating the aqueous solution of the melt with C 02, and finally reducing with sodium amalgam; can be prepared also by the reduction of indoxyl, indoxyl carboxylic acid, or indigo.
Chemical Properties	Indole has an unpleasant odor at high concentration, odor becomes floral at higher dilutions
Chemical Properties	white crystals with an unpleasant odour
Physical properties	Colorless to yellow scales with an unpleasant odor. Turns red on exposure to light and air. Odor threshold of 0.14 ppm was reported by Buttery et al. (1988).
Occurrence	Reported occurring in several natural products as a complex compound that decomposes during enfleurage or steam distillation yielding free indole; reported found in the essential oil from flower of Jasminum grandiflorum, in neroli oil and in the oil extracted from flowers of bitter orange; also reported in the flowers of several plants: lemon, coffee, Hevea brasiliensis and Randia formosa in the oil extracted from flowers of Jasminum odoratissinium L. and in the oil of Narcissus jonquilla. Also reported found in apricot, mandarin orange peel oil, grapes, kohlrabi, French fried potato, crispbread, cheeses, butter, milk, milk powder, boiled egg, fish oil, chicken, beef, pork, beer, rum, Finnish whiskey, red and white wine, coffee, tea, soybean, mushrooms, cauliflower, figs, rice, licorice, buckwheat, malt, wort, elder flower, clary sage, shrimp, okra, crab, clam, squid and green maté
Uses	Indole occurs in coal tar. It is used, underhigh dilution, in perfumery, and as an intermediatein organic synthesis.
Uses	Can be used in perfumes and in the synthesis of tryptophan.
Uses	In highly dil solutions the odor is pleasant, hence indole has been used in perfumery.
Uses	Indole is a flavoring agent that is a white, flaky crystalline product. it has an unpleasant odor when concentrated and a flowery odor when diluted. it is soluble in most fixed oils and propylene glycol and insoluble in glycerin and mineral oil. it is obtained from decomposi- tion of a protein.
Definition	indole: A yellow solid, C₈H₇N, m.p.52°C. Its molecules consist of a benzenering fused to a nitrogen-containingfive-membered ring. It occurs insome plants and in coal tar, and isproduced in faeces by bacterial action.It is used in making perfumes.Indole has the nitrogen atom positionednext to the fused benzenering. An isomer with the nitrogentwo atoms away from the fused ringis called isoindole.
Preparation	Obtained from the 220 to 260°C boiling fraction of coal tar or by heating sodium phenyl-glycine-o-carboxylate with NaOH, saturating the aqueous solution of the melt with CO2 and finally reducing with sodium amalgam; can be prepared also by the reduction of indoxyl, indoxyl carboxylic acid or indigo.
Aroma threshold values	Detection: 140 ppb
Synthesis Reference(s)	The Journal of Organic Chemistry, 55, p. 580, 1990 DOI: 10.1021/jo00289a036 Chemical and Pharmaceutical Bulletin, 35, p. 1823, 1987 DOI: 10.1248/cpb.35.1823
General Description	Indole is classified under the volatile flavor compounds (VFCs). It is known to play significant role in various biological functions such as anti-inflammatory, anticonvulsant, cardiovascular and antibacterial activities.
Hazard	A carcinogen.
Health Hazard	Low to moderate toxicity was observed inexperimental animals resulting from oral orsubcutaneous administration of indole. Theoral LD50 value in rats is 1000 mg/kg. It is ananimal carcinogen. It caused tumors in bloodand lungs in mice subjected to subcutaneousadministration.
Fire Hazard	Noncombustible solid.
Flammability and Explosibility	Not classified
Biochem/physiol Actions	Taste at 0.3-2 ppm
Source	Indole was detected in jasmine flowers (Jasminum officinale), licorice (Glycyrrhiza glabra), kohlrabi stems (Brassica oleracea var. gongylodes), and hyacinth flowers (Hyacinthus orientalis) at concentrations of 42 to 95, 2, 1.33, and 0.24 to 3.45 ppm, respectively. Indole also occurs in tea leaves, black locust flowers, corn leaves, petitgrain, and yellow elder (Duke, 1992). A liquid swine manure sample collected from a waste storage basin contained indole at a concentration of 4.8 mg/L (Zahn et al., 1997).
Environmental fate	Biological. In 9% anaerobic municipal sludge, indole degraded to 1,3-dihydro-2H-indol-2-one (oxindole), which degraded to methane and carbon dioxide (Berry et al., 1987). Heukelekian and Rand (1955) reported a 5-d BOD value of 1.70 g/g which is 65.4% of the ThOD value of 2.48 g/g. Chemical/Physical. The aqueous chlorination of indole by hypochlorite/hypochlorous acid, chlorine dioxide, and chloramines produced oxindole, isatin, and possibly 3-chloroindole (Lin and Carlson, 1984).
Metabolic pathway	The indole is metabolized in a mineral salt medium inoculated with 9% anaerobically digested nitrate- reducing sewage sludge, resulting in the sequential occurrence of four structurally related compounds: oxindole, isatine, dioxindole, and anthranilic acid. Indole is metabolized by fungus via indoxyl (3-hydroxyindole), N-formylanthranilic acid, anthranilic acid, 2,3-dihydroxybenzoic acid, and catecol, which is further degraded by an ortho cleavage.
Metabolism	Indole is oxidized to 3-hydroxyindole (indoxyl) which is conjugated with glucuronic and sulphuric acids before excretion. The sulphate conjugate seems to be the main product in rabbits and, even with relatively large doses of indole, the sulphate conjugation always exceeds that of glucuronic acid(Williams, 1959).
Purification Methods	It can be further purified by sublimation in a vacuum or by zone melting. The picrate forms orange crystals from EtOH and has m 175o. [Beilstein 20 II 196, 20 III/IV 3176, 20/7 V 5.]
Toxicity evaluation	Indole causes oxidative damage to membranes.

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ECHEMI Editorial Reference

Indole has an unpleasant odor at high concentration, odor becomes floral at higher dilutions white crystals with an unpleasant odourindole: A yellow solid, C8H7N, m.p.52°C. Its molecules consist of a benzenering fused to a nitrogen-containingfive-membered ring. It occurs insome plants and in coal tar, and isproduced in faeces by bacterial action.It is used in making perfumes.Indole has the nitrogen atom positionednext to the fused benzenering.
Indole is an aromatic heterocyclic organic compound with formula C8H7N. It has a bicyclic structure, consisting of a six-membered benzene ring fused to a five-membered nitrogen-containing pyrrole ring. Indole is widely distributed in the natural environment and can be produced by a variety of bacteria. As an intercellular signal molecule, indole regulates various aspects of bacterial physiology, including spore formation, plasmid stability, resistance to drugs, biofilm formation, and virulence. The amino acid tryptophan is an indole derivative and the precursor of the neurotransmitter serotonin.
Solid|White lustrous, flakey crystalline solid; Unpleasant odour at high concentration, odour becomes floral at higher dilutions
1H-indole is an indole and a polycyclic heteroarene. It has a role as an Escherichia coli metabolite. It is a tautomer of a 3H-indole.

Basic Info

Product Name:

Indole

Other Name:

1H-Indole;Indole;1-Azaindene;1-Benzazole;2,3-Benzopyrrole;Ketole;Benzo[b]pyrrole;NSC 1964

CAS No.:

120-72-9

Molecular Formula:

C8H7N

InChIKeys:

InChIKey=SIKJAQJRHWYJAI-UHFFFAOYSA-N

Molecular Weight:

117.14800

Exact Mass:

117.15

EC Number:

204-420-7

UNII:

8724FJW4M5

NSC Number:

1964

DSSTox ID:

DTXSID0020737

Color/Form:

LEAFLETS (WATER, PETROLEUM), CRYSTALS (ETHER)|Colorless to yellowish scales, turning red on exposure to light and air.|WHITE CRYSTALLINE SOLID|Colorless, shiny flakes

HScode:

2933990090

Categories:

Bulk Drug Intermediates

Characteristics

PSA:

15.79000

XLogP3:

2.1

Appearance:

Solid

Density:

1 x 10^-6 g/cm³ @ Temp: 25 °C

Melting Point:

52 °C

Boiling Point:

128-133 °C @ Press: 28 Torr

Flash Point:

136ºC

Refractive Index:

1.68

Water Solubility:

H2O: 2.80 g/L (25 ºC)

Storage Conditions:

2-8ºC

Vapor Pressure:

0.0298mmHg at 25°C

Toxicity:

LD50 orally in rats: 1 g/kg (Smyth)

Odor:

ALMOST FLORAL ODOR WHEN HIGHLY PURIFIED, OTHERWISE EXHIBITS CHARACTERISTIC ODOR OF FECES

OH:

1.54e-10 cm3/molecule*sec

Dissociation Constants:

pKa (basic)= -2.4

Collision Cross Section:

121 Å² [M+H]+ [CCS Type: DT, Method: single field calibrated with Agilent tune mix (Agilent)]|117.08 Å² [M-H]- [CCS Type: DT, Method: single field calibrated with Agilent tune mix (Agilent)]

Experimental Properties:

CONGEALING POINT: MORE THAN 51 °C (AFTER BEING DRIED OVER SULFURIC ACID)|Enthalpy of vaporization= 597.5 kJ/kg from 10.3 to 27.4 °C|hydroxyl radical rate constant = 1.54X10-10 cu-cm/molc sec @ 25 °C

Heat of Combustion:

3.650 kJ/kg at 25 °C

See More Indole Properties 

Hazard Identification

Classification of the substance or mixture

Acute toxicity - Category 4, Oral

Acute toxicity - Category 3, Dermal

Skin sensitization, Category 1

Serious eye damage, Category 1

GHS label elements, including precautionary statements

Precautionary statement(s)
Pictogram(s)
Signal word	Danger
Hazard statement(s)	H302 Harmful if swallowed H311 Toxic in contact with skin H317 May cause an allergic skin reaction H318 Causes serious eye damage
Prevention	P264 Wash ... thoroughly after handling. P270 Do not eat, drink or smoke when using this product. P280 Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/... P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P272 Contaminated work clothing should not be allowed out of the workplace.
Response	P301+P317 IF SWALLOWED: Get medical help. P330 Rinse mouth. P302+P352 IF ON SKIN: Wash with plenty of water/... P316 Get emergency medical help immediately. P321 Specific treatment (see ... on this label). P361+P364 Take off immediately all contaminated clothing and wash it before reuse. P333+P317 If skin irritation or rash occurs: Get medical help. P362+P364 Take off contaminated clothing and wash it before reuse. P305+P354+P338 IF IN EYES: Immediately rinse with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. P317 Get medical help.
Storage	P405 Store locked up.
Disposal	P501 Dispose of contents/container to an appropriate treatment and disposal facility in accordance with applicable laws and regulations, and product characteristics at time of disposal.

Other hazards which do not result in classification

no data available

Handling and Storage

Precautions for safe handling

Handling in a well ventilated place. Wear suitable protective clothing. Avoid contact with skin and eyes. Avoid formation of dust and aerosols. Use non-sparking tools. Prevent fire caused by electrostatic discharge steam.

Conditions for safe storage, including any incompatibilities

Store the container tightly closed in a dry, cool and well-ventilated place. Store apart from foodstuff containers or incompatible materials.

See More Indole Safety Data Sheet 

Seller Information

Business Type:
Trader

Main Products:
pharmaceutical intermediates,peptides,electronic chemicals

Location:
Room 102, 1st Floor, East Office Building, No. 45 Pengwan Road, Qianwan Bonded Port Area, Qingdao Zone, China (Shandong) Pilot Free Trade Zone

Payment Terms:
100% TT in advance

Average lead Time:
10

Total Annual Revenue:
$10 million-$25 million

Total Employees:
51-100

Year of Establishment:
2024

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We are mainly specilized in supply of pharmaceutical intermediates, electronic chemicals，food additives, and other fine chemical products.
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Website: orientchem.cc
Email: scarlett@orientchem.cc
WhatsApp: +86 17753254221

Inquiry History

10 Inquiries

Country	Product	Purchase Quantity	Date Posted
India	Good price of Indole 99% White Powder 120-72-9 Quanjinci	1 20' Fcl	Sep 14, 2023
United Kingdom	High Quality 99% Purity of Indole CAS NO 120-72-9 ISO 9001:2005 REACH Verified Producer	1 KG	Oct 7, 2023
United Kingdom	Ready to ship medicine raw material powder Indole CAS 120-72-9 with cheap price Indole-15N	1 KG	Oct 7, 2023
Turkey	Indole	500 G	Sep 11, 2026
Russia	Indole	200 KG	Nov 27, 2024
India	Indole	100 MT	Oct 11, 2024
India	Indole	300 KG	Jun 25, 2026
United States	indole	1 KG	Feb 15, 2024
Turkey	Indole	1 MT	Dec 12, 2024
India	Indole powder	10 MT	Sep 23, 2024

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Indole120-72-9C8H7N

Product Description

Seller Information

Inquiry History

Classification of the substance or mixture

GHS label elements, including precautionary statements

Other hazards which do not result in classification

Precautions for safe handling

Conditions for safe storage, including any incompatibilities

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