1,2,3,4-Tetrahydro-3-isoquinolinecarboxylic acid hydrochloride
1,2,3,4-Tetrahydro-3-isoquinolinecarboxylic acid hydrochloride (CAS 41994-51-8) is a heterocyclic compound with the molecular formula C10H11NO2 · HCl and a molecular weight of 213.66 g/mol. This building block is primarily utilised in chemical synthesis, particularly in the construction of complex isoquinoline-based structures. It serves as a key intermediate in research and development for novel compounds with potential biological activities.
- Synonyms
- 4-Tetrahydro-3-isoquinolinecarboxylic acid hydrochloride41994-51-8C10H11NO2 · HCl

Synthesis of Isoquinoline Derivatives
This compound is a valuable precursor for synthesising complex isoquinoline derivatives, such as 10,10a-dihydroimidazo-[1,5-b]isoquinoline-1,3(2H,5H)-diones.
Pharmacological Research Intermediate
It has been employed in the development of inhibitors for inflammation, apoprotein B-100 biosynthesis, and matrix-degrading metalloproteinases, indicating its utility in drug discovery.
Building Block in Organic Chemistry
As a functionalised isoquinoline, it serves as a versatile building block for introducing the tetrahydroisoquinoline moiety into larger molecules during organic synthesis.
| Molecular weight | 213.66 |
|---|---|
| Empirical formula | C10H11NO2 · HCl |
| Assay | 96% |
| Application | 1,2,3,4-Tetrahydro-3-isoquinolinecarboxylic acid was used in the synthesis of 10,10a-dihydroimidazo-[1,5-b]isoquinoline-1,3(2H,5H)-diones, inhibitor of inflammation, apoprotein B-100 biosynthesis and matrix-degrading metalloprotienase1. |
| Melting point | >300 °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 1,2,3,4-Tetrahydro-3-isoquinolinecarboxylic acid hydrochloride used for?
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It is used as a building block in chemical synthesis and as an intermediate in research, particularly for developing compounds like inflammation inhibitors and apoprotein B-100 biosynthesis inhibitors.
What are the CAS number and molecular formula?
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The CAS number is 41994-51-8 and the molecular formula is C10H11NO2 · HCl.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies this compound with an assay of 96%. This is a technical/research grade material and TSS does not represent it as USP, BP, EP or pharmacopoeia grade.
How should 1,2,3,4-Tetrahydro-3-isoquinolinecarboxylic acid hydrochloride be handled?
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This compound is a skin, eye, and respiratory irritant. Handle with appropriate personal protective equipment, including a dust mask (type N95 US recommended), eyeshields, and gloves. Ensure good ventilation and avoid breathing dust.
Is this chemical suitable for pharmaceutical applications?
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While used in research for potential pharmaceutical applications, this specific product is supplied at 96% assay and is not intended for direct use in pharmaceuticals, nutraceuticals, or food without further purification and testing.
How is this product packed and shipped?
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This chemical is carefully packed for safe transit and is available for export globally by Tech Serve Solutions.
How can I request a sample or quote?
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To request a sample or a quote, please contact our sales team through the website or by phone, providing the product name and CAS number.
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