5-Chloroindole-3-carboxaldehyde
5-Chloroindole-3-carboxaldehyde (CAS: 827-01-0) is a halogenated indole derivative with the molecular formula C9H6ClNO and a molecular weight of 179.60 g/mol. It serves as a valuable building block in organic synthesis, particularly within the pharmaceutical and fine chemical industries. This compound is characterised by its indole core substituted with a chlorine atom and a carboxaldehyde group, making it a reactive intermediate for constructing more complex molecular architectures. Its primary utility lies in research and development settings for creating novel compounds.

Pharmaceutical Intermediate
Utilised in the synthesis of active pharmaceutical ingredients (APIs) and drug discovery programmes. The indole scaffold is prevalent in many biologically active molecules.
Organic Synthesis Building Block
Serves as a versatile reagent for introducing the 5-chloroindole moiety into various organic structures. Its aldehyde functionality allows for a range of chemical transformations.
Research and Development
Employed in academic and industrial laboratories for the exploration of new chemical entities and reaction methodologies. It is a key component in heterocyclic chemistry.
| Molecular weight | 179.60 |
|---|---|
| Empirical formula | C9H6ClNO |
| Assay | 98% |
| Melting point | 213-216 °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-Chloroindole-3-carboxaldehyde used for?
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5-Chloroindole-3-carboxaldehyde is primarily used as a building block in organic synthesis, particularly for the development of new pharmaceutical agents and in chemical research.
What are the CAS number and chemical formula for this compound?
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The CAS number is 827-01-0 and the chemical formula is C9H6ClNO.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 5-Chloroindole-3-carboxaldehyde with an assay of 98%. We do not represent this product as USP, BP, or EP grade.
How should 5-Chloroindole-3-carboxaldehyde be handled?
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Handle with appropriate personal protective equipment, including a dust mask (N95), eyeshields, and gloves. Avoid breathing dust and ensure adequate ventilation to prevent respiratory irritation (H335). It may cause skin (H315) and eye (H319) irritation. Store in a well-ventilated place.
Is this chemical available for export?
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Yes, Tech Serve Solutions is a global supplier and exporter of fine chemicals, including 5-Chloroindole-3-carboxaldehyde.
How can I request a quote or sample?
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To request a quote or sample, please contact our sales department through the website or by phone, referencing the product name and CAS number (827-01-0).
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