5-Hydroxyisoquinoline
5-Hydroxyisoquinoline (CAS: 2439-04-5), a derivative of isoquinoline with the molecular formula C9H7NO and a molecular weight of 145.16, serves as a valuable building block in chemical synthesis. It is primarily utilised in the development of complex organic molecules and heterocyclic compounds. This technical grade material, with an assay of 90%, is suitable for various research and industrial applications requiring specific isoquinoline scaffolds.
- IUPAC
- 5-Isoquinolinol
- Synonyms
- 5-Isoquinolinol

Organic Synthesis Intermediate
5-Hydroxyisoquinoline is employed as a key intermediate in the synthesis of more complex organic molecules. Its heterocyclic structure makes it useful for building intricate molecular frameworks found in pharmaceuticals and specialty chemicals.
Heterocyclic Compound Development
This compound is a useful precursor for researchers developing novel heterocyclic compounds. It enables the introduction of the isoquinoline moiety into target molecules for diverse research purposes.
Research and Development
Utilised in R&D laboratories, 5-Hydroxyisoquinoline supports the exploration of new chemical entities and reaction pathways. Its specific structure facilitates custom synthesis projects.
| Molecular weight | 145.16 |
|---|---|
| Empirical formula | C9H7NO |
| Assay | 90% |
| Grade | technical grade |

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) | 26-37/39 |
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-Hydroxyisoquinoline used for?
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5-Hydroxyisoquinoline is primarily used as a building block in organic synthesis and for the development of heterocyclic compounds in research and development settings.
What are the CAS number and formula for 5-Hydroxyisoquinoline?
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The CAS number for 5-Hydroxyisoquinoline is 2439-04-5 and its empirical formula (Hill notation) is C9H7NO.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 5-Hydroxyisoquinoline as technical grade with an assay of 90%. We do not represent this product as USP, BP, or EP grade.
How should 5-Hydroxyisoquinoline be handled safely?
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According to GHS data, 5-Hydroxyisoquinoline is a Warning substance that causes skin irritation (H315), serious eye irritation (H319), and may cause respiratory irritation (H335). Recommended personal protective equipment includes a dust mask type N95 (US), eyeshields, and gloves. Avoid breathing dust. Ensure adequate ventilation.
Is 5-Hydroxyisoquinoline a controlled substance?
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The provided data does not indicate that 5-Hydroxyisoquinoline is a controlled substance.
How is 5-Hydroxyisoquinoline packed and exported?
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Tech Serve Solutions packs and exports fine chemicals and reagents in compliance with international shipping regulations to ensure safe transit.
How can I request a quote or sample for 5-Hydroxyisoquinoline?
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To request a quote or sample, please contact our sales department through the website or by phone, providing the product name and CAS number.
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