3-Methylindole
3-Methylindole (CAS: 83-34-1, Formula: C9H9N) is a heterocyclic organic compound with a molecular weight of 131.17 g/mol. It is a key indole derivative, often appearing as a crystalline solid. Primarily utilised as a building block in chemical synthesis, it plays a role in the creation of more complex molecules within pharmaceutical and research sectors. This compound is a valuable reagent for organic chemists.
- IUPAC
- Skatole
- Synonyms
- Skatole

Chemical Synthesis Intermediate
3-Methylindole serves as a versatile intermediate in the synthesis of various organic compounds. Its indole structure is a common motif in pharmaceuticals and natural products, making it a valuable starting material for complex molecule construction.
Research and Development
In research laboratories, 3-Methylindole is employed in exploring novel chemical pathways and developing new synthetic methodologies. It is a fundamental building block for heterocyclic chemistry investigations.
Building Block for Heterocycles
As a heterocyclic building block, 3-Methylindole is instrumental in constructing molecules featuring the indole core. This is relevant in the discovery and development of new chemical entities.
| Molecular weight | 131.17 |
|---|---|
| Empirical formula | C9H9N |
| Assay | 98% |
| Boiling point | 265-266 °C(lit.) |
| Melting point | 92-97 °C(lit.) |


Hazard statements
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
- H411Toxic to aquatic life with long-lasting effects
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P273Avoid release to the environment
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Flash point | 132 °C / 269.6 °F |
| Transport (UN / ADR) | UN 3335 |
| Water hazard class (WGK, DE) | 2 |
| Hazard codes (EU) | Xi,N |
| Risk statements (R) | 36/37/38-51/53 |
| Safety statements (S) | 26-36-61 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is 3-Methylindole primarily used for?
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3-Methylindole is primarily used as a building block and intermediate in chemical synthesis, particularly for the construction of more complex heterocyclic organic compounds.
What are the CAS number and molecular formula for 3-Methylindole?
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The CAS number for 3-Methylindole is 83-34-1, and its molecular formula is C9H9N.
What grade and purity does Tech Serve Solutions supply for 3-Methylindole?
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Tech Serve Solutions supplies 3-Methylindole with a minimum assay of 98%. This product is suitable for research and chemical synthesis and is not represented as USP, BP, or EP grade.
What are the main safety hazards associated with 3-Methylindole?
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3-Methylindole is a Warning substance, classified with hazards H315 (Causes skin irritation), H319 (Causes serious eye irritation), H335 (May cause respiratory irritation), and H411 (Toxic to aquatic life with long lasting effects). Appropriate personal protective equipment including dust masks (N95), eyeshields, and gloves should be used, and it should be handled in a well-ventilated area, avoiding release into the environment.
How is 3-Methylindole typically packed and shipped?
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3-Methylindole is carefully packed to ensure safe transit and is exported globally by Tech Serve Solutions. Specific packaging details are available upon request.
How can I request a sample or quote for 3-Methylindole?
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To request a sample or a quote for 3-Methylindole, please contact the Tech Serve Solutions sales team through our website or by phone.
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