Indole

The page’s line on indole, fecal at high concentration and narcotic in trace, is the house’s editorial and is kept as such. Its odour threshold in water is 11 micrograms per kilogram, as measured by a food-chemistry institute’s panel.

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The record

Each field carries its evidence: open a chip for the source, the quoted words and the confidence. A field with nothing behind it says so and stays empty.

Name

indole

documented

Indole

PUBCHEM-798 · PubChem Compound Summary for CID 798, Indole (1H-indole) · read 2026-09-27

confidence A

CAS

120-72-9

documented

verified: the CAS is among the CID's PubChem synonyms

PUBCHEM-798 · PubChem Compound Summary for CID 798, Indole (1H-indole) · read 2026-09-27

confidence A

PubChem CID

798

documented

PUBCHEM-798 · PubChem Compound Summary for CID 798, Indole (1H-indole) · read 2026-09-27

confidence A

Formula

C8H7N

documented

PUBCHEM-798 · PubChem Compound Summary for CID 798, Indole (1H-indole) · read 2026-09-27

confidence A

Molecular weight

117.15

documented

PUBCHEM-798 · PubChem Compound Summary for CID 798, Indole (1H-indole) · read 2026-09-27

g/mol, as PubChem states it

confidence A

IUPAC name

1H-indole

documented

PUBCHEM-798 · PubChem Compound Summary for CID 798, Indole (1H-indole) · read 2026-09-27

confidence A

SMILES

C1=CC=C2C(=C1)C=CN2

documented

PUBCHEM-798 · PubChem Compound Summary for CID 798, Indole (1H-indole) · read 2026-09-27

confidence A

InChIKey

SIKJAQJRHWYJAI-UHFFFAOYSA-N

documented

PUBCHEM-798 · PubChem Compound Summary for CID 798, Indole (1H-indole) · read 2026-09-27

confidence A

Odour threshold

11 µg/kg in water (orthonasal odour detection threshold in water, determined by the method of Czerny et al. 2008, Eur Food Res Technol 228:265–273, as the database states)

measured

OT-1 · Kreissl J, Mall V, Steinhaus P, Steinhaus M · read 2026-09-30

in air, 0.00030 ppm (v/v) by the triangle odour bag method (OT-3); an older compiled value, 140 ppb in water (OT-4), states no method. The database’s odour quality is “fecal, mothball-like” (OT-1); the record’s descriptors stay the house’s editorial

confidence A

Descriptors

fecal at high concentration, narcotic at trace levels

house interpretation

the house’s own reading, labelled as such

the page’s olfactory editorial, kept as editorial by the house’s review (register row 2260); no descriptor source is filed

where the site says it: /materials, “Jasminum grandiflorum”

confidence C

Volatility class

not on record

not on record

the simulator’s data (modeled) has no entry for indole

Regulation

not on record

not on record

no Regulation record yet

3D structure

PubChem computed 3D conformer · 16 atoms, 17 bonds

modeled

PUBCHEM-798 · PubChem Compound Summary for CID 798, Indole (1H-indole) · read 2026-09-27

PubChem’s computed 3D conformer: a model, drawn schematically, not an experimental structure (the site’s molecule data note)

confidence A

Occurs in

In teaching accords

• A white floral, indolic

Claims register

Every sentence and number the site states about this record, with its status after the 2026-09-27 review.

• verified · CAS 120-72-9
  documented · register row 2

  PUBCHEM-798 · PubChem Compound Summary for CID 798, Indole (1H-indole) · read 2026-09-27

  the CAS is among the PubChem synonyms of CID 798 (the site’s molecule data cas_status)

  where the site says it: /materials, “Jasminum grandiflorum”

  confidence A

• unverified · At high concentration it is objectively fecal. At the trace levels present in jasmine absolute, it produces the headily narcotic depth that makes white flowers so seductive.
  house interpretation · register row 2260

  the house’s own reading, labelled as such

  kept by the house’s review as olfactory editorial (no number); no descriptor source is filed

  where the site says it: /materials, “Jasminum grandiflorum”

  confidence C

• verified · C₈H₇N
  documented · register row 67

  PUBCHEM-798 · PubChem Compound Summary for CID 798, Indole (1H-indole) · read 2026-09-27

  PubChem gives MolecularFormula C8H7N for CID 798 (the site’s molecule data)

  where the site says it: /materials, “Jasminum grandiflorum”

  confidence A

Sources

1. PUBCHEM-798 · PubChem Compound Summary for CID 798, Indole (1H-indole). National Center for Biotechnology Information (NCBI), U.S. National Library of Medicine; live database, read 2026-09-27 through the PUG REST endpoints listed in the site’s molecule data. pubchem.ncbi.nlm.nih.gov/compound/798 · read 2026-09-27 · PubChem data are provided by NCBI; the computed conformer is PubChem-generated. No file from PubChem is stored besides the derived JSON (PUBCHEM-108242, "Licence / reuse", written for CID 108242 and read as PubChem’s general terms; the terms for this CID were not re-read).
2. OT-1 · Kreissl J, Mall V, Steinhaus P, Steinhaus M. Leibniz-LSB@TUM Odorant Database, Version 1.2. Leibniz Institute for Food Systems Biology at the Technical University of Munich: Freising, Germany, 2022. www.leibniz-lsb.de/en/databases/leibniz-lsbtum-o… · read 2026-09-30 · free of charge; scientific use encouraged with full acknowledgement; systematic download or reproduction needs written permission (its copyright page, read 2026-09-30): single values are cited with their references, the responses are not filed
3. OT-3 · Nagata Y. Measurement of Odor Threshold by Triangle Odor Bag Method. In: Odor Measurement Review, pp. 118–127. Ministry of the Environment, Government of Japan (undated on the page; about 2003). www.env.go.jp/en/air/odor/measure/02_3_2.pdf · read 2026-09-30 · a government publication, public on the Ministry’s site; no reuse licence stated; short quotes only, the PDF is not filed

These records are published under CC BY 4.0.

this record as data: /data/molecule/indole.json · version 3 · updated 2026-09-30 · confidence A