5-Chloroindole-2-carboxylic acid
5-Chloroindole-2-carboxylic acid (CAS 10517-21-2) is a halogenated heterocyclic compound with the molecular formula C9H6ClNO2 and a molecular weight of 195.60 g/mol. As a valuable indole derivative and building block, it finds application in chemical synthesis and research laboratories. Its structure makes it a useful intermediate for creating more complex molecules, particularly within medicinal chemistry and materials science research.

Chemical Synthesis Intermediate
5-Chloroindole-2-carboxylic acid serves as a key intermediate in organic synthesis. Its functional groups allow for various chemical transformations, facilitating the construction of diverse molecular architectures.
Research and Development
This compound is utilised in academic and industrial research settings for developing novel compounds. It is particularly relevant in the exploration of new pharmaceutical agents and advanced materials.
Heterocyclic Chemistry
As a substituted indole, it is a crucial component for chemists working with heterocyclic building blocks. Its specific structure aids in the synthesis of specialised indole-based compounds.
| Molecular weight | 195.60 |
|---|---|
| Empirical formula | C9H6ClNO2 |
| Assay | 98% |
| Melting point | 287 °C (dec.)(lit.) |

Hazard statements
- H302Harmful if swallowed
- 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) | Xn |
| Risk statements (R) | 22-36/37/38 |
| 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-2-carboxylic acid used for?
+
5-Chloroindole-2-carboxylic acid is primarily used as an intermediate in chemical synthesis and for research and development purposes, particularly within heterocyclic chemistry and the exploration of novel compounds.
What are the CAS number and formula for 5-Chloroindole-2-carboxylic acid?
+
The CAS number for 5-Chloroindole-2-carboxylic acid is 10517-21-2, and its molecular formula is C9H6ClNO2.
What grade and purity does Tech Serve Solutions supply?
+
Tech Serve Solutions supplies 5-Chloroindole-2-carboxylic acid with a minimum assay of 98%. This product is intended for research and laboratory use, and TSS does not represent it as USP, BP, or EP grade.
How should 5-Chloroindole-2-carboxylic acid be handled safely?
+
5-Chloroindole-2-carboxylic acid is classified with a Warning signal word. It is harmful if swallowed (H302), causes skin irritation (H315), causes serious eye irritation (H319), and may cause respiratory irritation (H335). Appropriate personal protective equipment, including a dust mask (type N95 US), eyeshields, and gloves, should be used. Ensure adequate ventilation.
Is 5-Chloroindole-2-carboxylic acid a controlled substance?
+
The provided data does not indicate that 5-Chloroindole-2-carboxylic acid is a controlled substance.
How is this chemical packed, shipped, or exported?
+
Tech Serve Solutions specialises in the global supply and export of fine chemicals. Specific packing and shipping details are confirmed upon order based on quantity and destination.
How can I request a sample or quote for 5-Chloroindole-2-carboxylic acid?
+
To request a sample or a quotation, please contact our sales department through the website or by phone, providing the product name and CAS number (10517-21-2).
▶ Related products

1-(2-Fluorobenzyl)piperazine
C11H15FN2
Chemical Synthesis
1-(2-Fluorophenyl)biguanide hydrochloride
Chemical Synthesis

1-(2-Fluorophenyl)cyclopropanecarboxylic acid
C10H9FO2
Chemical Synthesis
1-(2-Fluorophenyl)piperazine
C10H13FN2
Chemical Synthesis
1-(2-Fluorophenyl)piperazine monohydrochloride
C10H13FN2 · HCl
Chemical Synthesis
1-(2-Furoyl)-1H-benzotriazole
C11H7N3O2
Chemical Synthesis
1-(2-Furoyl)piperazine
C9H12N2O2
Chemical Synthesis
1-(2-Hydroxy-5-methylphenyl)-3-phenyl-1,3-propanedione
Chemical Synthesis
▶ Explore more

3-Methyl-1,5-di-p-tolyl-1,4-pentazadiene
Chemical Synthesis

3-Methyl-1,5-pentanediol
Chemical Synthesis

3-Methyl-1-(2-methylphenyl)-1H-pyrazol-5-amine
C11H13N3
Chemical Synthesis
3-Methyl-1-(3′-sulfoamidophenyl)-5-pyrazolone
C10H11N3O3S
Chemical Synthesis