About this material
Indole is a white to light brown crystalline solid powdery material.
It’s a bicyclic structure, consisting of a benzene ring fused to a pyrrole ring. Fully aromatic due to delocalised electrons across the fused rings.
It is super strong, with a fecal odour in high concentrations, but at low concentrations, it has a beautifully pleasant, floral scent (like jasmine)
It has the most powerful and intensely diffusive potent scent, far more powerful than Indolarome by IFF, nearly resembling tar in its off-putting and suffocating nature in its raw form.
When diluted to less than 0.1% or combined in blends, it emits strong floral aromas and the most pleasing aura.
Although volatile at room temperature, it exhibits lasting strength.
It is found naturally in coal tar, animal feces, and many plants.
It is commonly used as a component of jasmine and orange blossom perfumes (in low concentrations).
The absolute companion to any Jasmine formulation.
Scent character
Highlights from the material’s listed odour profile.
Note position
Base note
Material character
A closer lookOdour strength
(Recommend smelling in a 1% solution or less)
Listed qualitative strength
Tenacity / substantivity
400 hour(s)
at 50% in DPG
Listed reference conditions
Fragrance development
Base note
Illustrative note development · no measured evaporation data
Molecular identity

C8H7N
CAS-linked compound reference — Indole
This compound record is linked to the explicitly recorded CAS number. It is not supplier confirmation of the supplied grade, purity, stereochemistry, isomer proportions or complete composition.
- Reference molecular weight
- 117.15 g/mol
- Reference IUPAC name
- 1H-indole
More compound properties
Computed and structural reference properties for the named compound. These are not measured supplier specifications or properties of a complete dilution, mixture or batch.
- XLogP (computed)
- 2.1
- Exact mass (Da)
- 117.057849228
- Monoisotopic mass (Da)
- 117.057849228
- Topological polar surface area (Ų)
- 15.8
- Complexity
- 101
- Formal charge
- 0
- Hydrogen bond donors
- 1
- Hydrogen bond acceptors
- 0
- Rotatable bonds
- 0
- Heavy atoms
- 9
- Isotope atoms
- 0
- Atom stereocentres
- 0
- Bond stereocentres
- 0
- Covalent units
- 1
- SMILES
- C1=CC=C2C(=C1)C=CN2
- InChI
- InChI=1S/C8H7N/c1-2-4-8-7(3-1)5-6-9-8/h1-6,9H
- InChIKey
- SIKJAQJRHWYJAI-UHFFFAOYSA-N
Reference data checked 2026-10-27.
CAS 120-72-9 · reference checked 2026-10-27.
Fragrance allergen reference
Generic regulatory reference only. This is not a supplier allergen declaration, measured composition, allergen-free claim or finished-product labelling assessment.
Raw-material reference based on recorded CAS numbers. A CAS match identifies a reference entry; it does not verify the supplied grade, composition, purity or finished-product compliance. Naturals, bases and mixtures require composition review.
European Union / Northern Ireland
No direct listed-entry CAS match in this jurisdiction’s held reference set. This does not mean the material is allergen-free. Constituents, grouped entries and natural-material composition may require further review.
Finished-cosmetic declaration thresholds: greater than 0.001% leave-on; greater than 0.01% rinse-off. Apply the current target-market rules to the actual complete formulation; no concentration is inferred here.
Commission Regulation (EU) 2023/1545 · Regulation (EU) 2023/1545 with 11 November 2025 corrigendum; checked 2026-10-26.
Held EU transition dates: placing noncompliant products on the market until 2026-07-31; making them available until 2028-07-31. Check applicability and current law for the intended market. 2025 corrigendum.
Great Britain
No direct listed-entry CAS match in this jurisdiction’s held reference set. This does not mean the material is allergen-free. Constituents, grouped entries and natural-material composition may require further review.
Finished-cosmetic declaration thresholds: greater than 0.001% leave-on; greater than 0.01% rinse-off. Apply the current target-market rules to the actual complete formulation; no concentration is inferred here.
Regulation (EC) No 1223/2009, Annex III (Great Britain) · legislation.gov.uk current text checked 2026-10-26.
Current supplier composition or allergen declarations are required to assess naturals, bases, mixtures and actual concentrations. Reference data checked 2026-10-26; bundle 2026-10-27. Supplementary private documents remain separate.
Product specification
| CAS number | 120-72-9 |
|---|---|
| Odour description (decreasing) | Powerful, Animal, Floral, Moth Ball, Fecal, Naphthelene |
| Odour strength | High (Recommend smelling in a 1% solution or less) |
| Perfumery use | Effective from the smallest traces up to 0.1%Listed perfumery guidance; this is not an IFRA limit. |
| Substantivity | 400 hour(s) at 50% in DPG |
| Solvent | None |
| Physical state | Solid |
| Synonyms | 1-Benzo(b)Pyrrole |
| Recorded name / preparation | 1H-indole, Indole Natural |
Safety & handling
Signal word: Danger
Hazard statements:
- H302 Harmful if swallowed.
- H311 Toxic in contact with skin.
Precautionary statements:
- P264 Wash hands and other contacted skin thoroughly after handling.
- P270 Do no eat, drink or smoke when using this product.
- P280 Wear protective gloves/eye protection/face protection.
- P301+P312 IF SWALLOWED: Call a POISON CENTER or doctor/physician if you feel unwell.
- P302+P352 IF ON SKIN: Wash with plenty of soap and water.
- P312 Call a POISON CENTER or doctor/physician if you feel unwell.
- P330 Rinse mouth.
- P361 Remove/Take off immediately all contaminated clothing.
- P363 Wash contaminated clothing before reuse.
- P405 Store locked up.
- P501 Dispose of contents/container to: approved disposal site.
Professional/Industrial use only.
Datasheets & customer documents
Available documents are attached to eligible completed orders in your account.
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Supplementary documents are supplied only where explicitly listed and available. Check documentation information
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Documentation Supply PolicyIFRA formulation guide
Generic reference only — not an IFRA certificate, compliance decision or use recommendation. The Responsible Person and qualified safety assessor must assess the actual finished formula using current applicable IFRA Standards, supplementary documentation where available and the CPSR.
Raw-material reference based on recorded CAS numbers. A CAS match identifies a reference entry; it does not verify the supplied grade, composition, purity or finished-product compliance. Naturals, bases and mixtures require composition review.
Source: 51st Amendment overview, held source checked 2026-10-21. Bundle 2026-10-27. Individual Standards prevail over the overview.
No direct IFRA overview entry matched the recorded CAS in this held dataset. This does not mean unrestricted use, absence of relevant Standards or compliance. Constituent restrictions may still apply.
IFRA source overview · Individual IFRA Standards and supplementary documentation
Supplier certificates and private documents are separate evidence. Their availability does not determine whether this generic guide is shown. This is a dated local reference, not a live regulatory feed.
Creative ideas to explore
Creative directions, not tested formulas.Petals and peel
With bergamot and a light citrus ideaExplore a brighter version of the floral character using a simple citrus counterpoint. Compare it with the unchanged flower accord and note whether the citrus frames the bloom or becomes the main subject of the sketch.
Stem and blossom
With geranium and leafy notesSketch the flower with a greener setting, keeping leaf and blossom as distinct ideas. Compare a clean floral reference with the greener version to decide how much of the imagined stem and garden belongs in the composition.
Petals over wood
With a transparent wood directionPlace the floral material against a spare wood backdrop and follow the balance through the evaluation. Try a softer wood variation separately, then choose whether your flower needs an open, airy setting or a smoother, more enveloping frame.







Franca Tulino (verified owner) –
Ovidiu (verified owner) –
Super!
suson.teodor (verified owner) –
Indole – Animalic, floral, and powerful — brings natural intensity and realism to jasmine and white-flower accords.