Indole-5-Carboxylic Acid CAS#1670-81-1

Multi-Functional Heterocyclic Scaffold: Functions as a vital indole-derived starting material to construct numerous pharmaceutical agents and fine chemical products.

Broadly Applied in Drug Discovery: Occupies an essential position within medicinal chemistry studies, aiding the creation of novel therapeutic leads and bioactive substances.

Well Suited for Enzyme Inhibitor Preparation: Works as a core precursor for assembling enzyme inhibitors, which underpins cutting-edge biochemical and pharmaceutical investigations.

Enables Progress in Oncology Research: Deployed to develop anticancer immunomodulators and other therapeutic agents, rendering it highly useful for cancer-focused research initiatives.

Product Description of Indole-5-Carboxylic Acid CAS#1670-81-1

Indole-5-carboxylic acid (CAS#1670-81-1), bearing the molecular formula C₉H₇NO₂, is a flexible heterocyclic scaffold originating from the indole skeleton. It is heavily adopted across research work as an essential synthetic intermediate and reactant to produce enzyme inhibitors, anticancer immunomodulators, and a broad array of therapeutic agents.

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Indole-5-Carboxylic Acid Chemical Properties

Melting point 

211-213 °C (lit.)

Boiling point 

287.44°C (rough estimate)

density 

1.2480 (rough estimate)

refractive index 

1.5050 (estimate)

storage temp. 

Keep in dark place,Sealed in dry,Room Temperature

solubility 

Soluble in ethanol (50 mg/ml), dimethyl sulfoxide and methanol.

pka

4.40±0.30(Predicted)

form 

Powder

color 

Light beige to yellow

BRN 

124391

InChIKey

IENZCGNHSIMFJE-UHFFFAOYSA-N

CAS DataBase Reference

1670-81-1(CAS DataBase Reference)

Hazard Codes 

Xn,Xi

Risk Statements 

36/37/38-21/22

Safety Statements 

22-24/25-36/37/39-26

WGK Germany 

3

HazardClass 

IRRITANT

HS Code 

29339990

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Product Application of Indole-5-Carboxylic Acid CAS#1670-81-1

Indole-5-carboxylic acid functions as a critical synthetic scaffold for organic transformations and pharmaceutical manufacturing. It enjoys extensive adoption within research and development programs, alongside routine synthetic workflows and industrial-scale chemical production.

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