1-Chloro-4-hydroxyisoquinoline
1-Chloro-4-hydroxyisoquinoline (CAS: 3336-43-4) is a halogenated heterocyclic building block with the molecular formula C 9 H 5 NClOH and a molecular weight of 179.60 g/mol. This compound serves as a valuable intermediate in organic synthesis, particularly for the construction of more complex isoquinoline derivatives. Its utility is primarily in chemical research and development for creating novel molecular structures.

Organic Synthesis Intermediate
Serves as a key building block for the synthesis of diverse isoquinoline-based compounds. Utilised in multi-step reactions for constructing complex organic molecules.
Pharmaceutical Research
A precursor in the development of potential pharmaceutical agents. Its structure allows for modification to explore novel therapeutic targets.
Materials Science
Can be employed in the synthesis of functional materials with specific electronic or optical properties. Its heterocyclic nature offers opportunities for advanced material design.
| Molecular weight | 179.60 |
|---|---|
| Linear formula | C9H5NClOH |
| Assay | 97% |
| Melting point | 184-188 °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 1-Chloro-4-hydroxyisoquinoline used for?
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1-Chloro-4-hydroxyisoquinoline (CAS: 3336-43-4) is primarily used as a building block in organic synthesis and in research for the development of new chemical entities, particularly within pharmaceutical and materials science research.
What are the CAS number and molecular formula for 1-Chloro-4-hydroxyisoquinoline?
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The CAS number for 1-Chloro-4-hydroxyisoquinoline is 3336-43-4, and its linear formula is C 9 H 5 NClOH.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 1-Chloro-4-hydroxyisoquinoline with an assay of 97%. We do not represent this product as USP, BP, EP, or any other pharmacopoeia grade.
How should 1-Chloro-4-hydroxyisoquinoline be handled?
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1-Chloro-4-hydroxyisoquinoline is a Warning substance classified with H315 (Causes skin irritation), H319 (Causes serious eye irritation), and H335 (May cause respiratory irritation). Appropriate personal protective equipment, including a dust mask (type N95 or equivalent), eyeshields, and gloves, should be used. Work in a well-ventilated area and avoid dust formation. Refer to the Safety Data Sheet for full handling instructions.
Is 1-Chloro-4-hydroxyisoquinoline a controlled substance?
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The provided data does not indicate that 1-Chloro-4-hydroxyisoquinoline is a controlled substance.
How is 1-Chloro-4-hydroxyisoquinoline packed and shipped?
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1-Chloro-4-hydroxyisoquinoline is carefully packed for safe transport and export according to international shipping regulations for chemicals.
How can I request a sample or quote for 1-Chloro-4-hydroxyisoquinoline?
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To request a sample or quote for 1-Chloro-4-hydroxyisoquinoline, please contact our sales team through the provided channels on our website.
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