5-Iodoindole
5-Iodoindole (CAS: 16066-91-4), with the molecular formula C8H6IN and a molecular weight of 243.04 g/mol, is a halogenated heterocyclic compound. It serves as a valuable building block in organic synthesis, particularly for the construction of more complex indole-based molecules. Its applications are predominantly within chemical research and development laboratories.

Organic Synthesis Intermediate
5-Iodoindole is utilised as a key intermediate in the synthesis of various organic compounds. Its iodo-substitution allows for diverse coupling reactions, enabling the introduction of the indole core into larger molecular structures.
Pharmaceutical Research
This compound serves as a building block in the development of novel pharmaceutical agents. The indole scaffold is present in numerous biologically active molecules, making 5-Iodoindole a relevant starting material for drug discovery efforts.
Material Science
Applications extend to material science, where indole derivatives are explored for their electronic and optical properties. 5-Iodoindole can be incorporated into polymers or organic electronic materials.
| Molecular weight | 243.04 |
|---|---|
| Empirical formula | C8H6IN |
| Assay | 97% |
| Melting point | 101-104 °C(lit.) |

Hazard statements
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38 |
| Safety statements (S) | 26-36 |
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 5-Iodoindole primarily used for?
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5-Iodoindole is primarily used as a building block in organic synthesis, particularly in the development of pharmaceutical agents and in material science research.
What is the CAS number and formula for 5-Iodoindole?
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The CAS number for 5-Iodoindole is 16066-91-4, and its empirical formula is C8H6IN.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 5-Iodoindole with a purity of 97%. This product is intended for research and laboratory use; TSS does not represent it as USP, BP, or EP grade.
How should 5-Iodoindole be handled safely?
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5-Iodoindole is classified with Warning signal word and carries hazard statements H315, H319, and H335, indicating it can cause skin irritation, serious eye irritation, and respiratory irritation. Appropriate personal protective equipment, including Eyeshields, Gloves, and a dust mask type N95 (US), should be worn. Handle in a well-ventilated area. In case of eye contact, rinse cautiously with water for several minutes, removing contact lenses if present and easy to do; continue rinsing.
Is 5-Iodoindole exported globally by TSS?
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Yes, Tech Serve Solutions is a specialist global supplier and exporter of fine chemicals, including 5-Iodoindole.
How can I request a sample or quote for 5-Iodoindole?
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To request a sample or a quote for 5-Iodoindole, please contact our sales department via the contact form on our website or by telephone.
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