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Cas No: 120-72-9
USD $ 3.0-3.0 / Kilogram 1 Kilogram 1-50 Metric Ton/Month Hangzhou Dayangchem Co., Ltd. Contact Supplier
Cas No: 120-72-9
USD $ 1.0-1.0 / Kilogram 25 Kilogram 10000 Kilogram/Month Career Henan Chemical Co Contact Supplier
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Cas No: 120-72-9
USD $ 1.0-1.0 / Metric Ton 1 Metric Ton 10 Metric Ton/Month Chemical Co.Ltd Contact Supplier
Indole CAS NO.120-72-9
Cas No: 120-72-9
USD $ 1.0-3.0 / Metric Ton 1 Metric Ton 10 Metric Ton/Day Hebei yanxi chemical co.,LTD. Contact Supplier
High purity Indole with high quality and best price cas:120-72-9
Cas No: 120-72-9
USD $ 25.0-50.0 / Kilogram 1 Kilogram 99999 Kilogram/Year Hangzhou Dingyan Chem Co., Ltd Contact Supplier
Amadis Chemical offer CAS#120-72-9;CAT#A804576
Cas No: 120-72-9
No Data 10 Milligram Amadis Chemical Co., Ltd. Contact Supplier
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No Data No Data No Data Chemwill Asia Co., Ltd. Contact Supplier
Cas No: 120-72-9
USD $ 5.0-5.0 / Kilogram 1 Kilogram 1000 Kilogram/Month Enke Pharma-tech Co.,Ltd. (Cangzhou, China ) Contact Supplier
Indole CAS: 120-72-9
Cas No: 120-72-9
USD $ 1.0-2.0 / Metric Ton 5 Metric Ton 1000 Metric Ton/Year Henan Sinotech Import&Export Corporation Contact Supplier
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No Data 1 Kilogram 300 Kilogram/Month HENAN SUNLAKE ENTERPRISE CORPORATION Contact Supplier

120-72-9 Usage


(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.


LD50 1000 mg/kg(test with rat orally).

Chemical Properties

white crystals with an unpleasant odour

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)

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.

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.]

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.


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.


In highly dil solutions the odor is pleasant, hence indole has been used in perfumery.


Can be used in perfumes and in the synthesis of tryptophan.

120-72-9 Well-known Company Product Price

Brand (Code)Product description CAS number Packaging Price Detail
Aldrich (I3408)  Indole  ≥99% 120-72-9 I3408-500G 3,279.51CNY Detail
Aldrich (I3408)  Indole  ≥99% 120-72-9 I3408-100G 850.59CNY Detail
Aldrich (I3408)  Indole  ≥99% 120-72-9 I3408-25G 351.00CNY Detail
Alfa Aesar (A14427)  Indole, 99%    120-72-9 1000g 2936.0CNY Detail
Alfa Aesar (A14427)  Indole, 99%    120-72-9 250g 863.0CNY Detail
Alfa Aesar (A14427)  Indole, 99%    120-72-9 50g 365.0CNY Detail
TCI America (I0021)  Indole  >99.0%(GC) 120-72-9 500g 1,990.00CNY Detail
TCI America (I0021)  Indole  >99.0%(GC) 120-72-9 100g 520.00CNY Detail
TCI America (I0021)  Indole  >99.0%(GC) 120-72-9 25g 195.00CNY Detail



According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 10, 2017

Revision Date: Aug 10, 2017


1.1 GHS Product identifier

Product name 1H-indole

1.2 Other means of identification

Product number -
Other names 1H-Benzo[b]pyrrole

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only. Fragrances
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:120-72-9 SDS

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