5-Amino-1,2,3,4-tetrahydroisoquinoline
5-Amino-1,2,3,4-tetrahydroisoquinoline (CAS: 115955-90-3), with the molecular formula C9H12N2 and a molecular weight of 148.20 g/mol, is a heterocyclic organic compound. It serves as a valuable building block in chemical synthesis, particularly within the realm of isoquinoline derivatives. This compound is a key intermediate for the development of more complex molecular structures in research and industrial applications.
- IUPAC
- 1,2,3,4-Tetrahydro-5-aminoisoquinoline
- Synonyms
- 1,2,3,4-Tetrahydroisoquinoline, 5-amino-4-tetrahydroisoquinoline,115955-90-3, C9H12N21,2,3,4-Tetrahydro-5-aminoisoquinoline

Organic Synthesis Intermediate
Utilised as a foundational component in the synthesis of complex organic molecules. Its tetrahydroisoquinoline core and amino substituent make it a versatile precursor for derivatisation.
Pharmaceutical Research
Serves as a building block in the discovery and development of new pharmaceutical agents. The isoquinoline scaffold is present in various biologically active compounds.
Agrochemical Development
Can be employed in the synthesis of novel agrochemicals, contributing to the development of new crop protection agents.
Material Science
Potentially used in the development of new materials with specific electronic or optical properties due to its heterocyclic aromatic structure.
| Molecular weight | 148.20 |
|---|---|
| Empirical formula | C9H12N2 |
| Assay | 98% |
| Melting point | 153-155 °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 5-Amino-1,2,3,4-tetrahydroisoquinoline used for?
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5-Amino-1,2,3,4-tetrahydroisoquinoline is primarily used as a building block in organic synthesis, finding applications in pharmaceutical research, agrochemical development, and potentially material science.
What is the CAS number and molecular formula for 5-Amino-1,2,3,4-tetrahydroisoquinoline?
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The CAS number is 115955-90-3, and the molecular formula is C9H12N2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 5-Amino-1,2,3,4-tetrahydroisoquinoline with an assay of 98%. TSS does not represent this product as USP, BP, EP, or any other pharmacopoeia grade.
How should 5-Amino-1,2,3,4-tetrahydroisoquinoline be handled safely?
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Handle with appropriate personal protective equipment, including a dust mask (type N95 or equivalent), eyeshields, and gloves. Avoid breathing dust and ensure adequate ventilation. This compound is classified with hazards H315 (Causes skin irritation), H319 (Causes serious eye irritation), and H335 (May cause respiratory irritation).
Is 5-Amino-1,2,3,4-tetrahydroisoquinoline available for export?
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Yes, Tech Serve Solutions is a global supplier and exporter of fine chemicals, including 5-Amino-1,2,3,4-tetrahydroisoquinoline.
How can I request a sample or quote for 5-Amino-1,2,3,4-tetrahydroisoquinoline?
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Please contact our sales department through the website or by phone to request a sample or a quotation for 5-Amino-1,2,3,4-tetrahydroisoquinoline.
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