5-Hydroxyindole-3-acetic acid
5-Hydroxyindole-3-acetic acid (CAS 54-16-0, C10H9NO3) is a crystalline off-white to purple solid with a molecular weight of 191.18 g/mol. This compound is recognised for its role in biological systems, particularly in cell signalling and neuroscience. It is primarily used in research settings to investigate neurotransmission pathways and serotonergic systems.
- IUPAC
- 5-HIAA

Neuroscience Research
Utilised in studies investigating neurotransmitter function and signalling pathways within the nervous system. Its structural relation to serotonin metabolites makes it a valuable tool for exploring neurological processes.
Cell Biology Studies
Employed as a research chemical to understand cellular mechanisms, particularly those involving indole derivatives. It can be used to probe signalling cascades and cellular responses in biological experiments.
Biochemical Investigations
Serves as a reference standard or research tool in biochemical assays. Its properties are leveraged to study metabolic pathways and enzyme activities in vitro.
| Molecular weight | 191.18 |
|---|---|
| Empirical formula | C10H9NO3 |
| Assay | ≥98% (TLC) |
| Form | crystalline |
| Colour | off-white to purple |
| Storage temperature | −20°C |
| Melting point | 161-164 °C (dec.)(lit.) |
| Protective equipment | Eyeshields, Gloves, type N95 (US), type P1 (EN143) respirator filter |
|---|---|
| Water hazard class (WGK, DE) | 3 |
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-Hydroxyindole-3-acetic acid used for?
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5-Hydroxyindole-3-acetic acid is primarily used in research for neuroscience, cell biology, and biochemical investigations, particularly in studying neurotransmission and serotonergic systems.
What is the CAS number and molecular formula for 5-Hydroxyindole-3-acetic acid?
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The CAS number is 54-16-0 and the molecular formula is C10H9NO3.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 5-Hydroxyindole-3-acetic acid with an assay of ≥98% (TLC). We do not represent this product as USP, BP, or EP grade.
How should 5-Hydroxyindole-3-acetic acid be handled and stored?
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Handle with appropriate personal protective equipment, including eyeshields, gloves, and a type N95 respirator filter. Store at -20°C. Refer to the safety data sheet for comprehensive handling information.
Is 5-Hydroxyindole-3-acetic acid a controlled substance?
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Based on the provided data, 5-Hydroxyindole-3-acetic acid is not indicated as a controlled substance.
How is 5-Hydroxyindole-3-acetic acid packed, shipped, and exported?
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Products are carefully packed for export, adhering to international shipping regulations for chemicals. Please contact us for specific export inquiries.
How can I request a sample or quote for 5-Hydroxyindole-3-acetic acid?
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Please use the contact form on our website or email our sales team to request a sample or a quotation for 5-Hydroxyindole-3-acetic acid.
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