C9H11N
133.19 g/mol
Pharmaceutical IntermediateDanger
1,2,3,4-Tetrahydroisoquinoline
CAS91-21-4EC202-050-0
Category
Pharmaceutical Intermediate
Compound Class
Amine
Primary Use
Pharmaceutical Intermediate
1,2,3,4-Tetrahydroisoquinoline is a member of the isoquinoline family. It is commonly used as an intermediate in pharmaceutical manufacturing.
pharmaceutical intermediate
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
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Referencesame scaffold
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Referencesame scaffold
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Referencesame scaffold
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Safety Reference
Danger
H301Toxic if swallowed
H310Fatal in contact with skin
H314Causes severe skin burns and eye damage
H315Causes skin irritation
H318Causes serious eye damage
H319Causes serious eye irritation
H332Harmful if inhaled
H335May cause respiratory irritation
H371May cause damage to organs
H412Harmful to aquatic life with long lasting effects
Customs Tariff Classification
The international HS code for 1,2,3,4-Tetrahydroisoquinoline (CAS 91-21-4) is 2933.49.
HS code (international, 6-digit)
2933.49
EU CN code (8-digit)
2933 49 90
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
IUPAC Name
1,2,3,4-tetrahydroisoquinoline
InChIKey
UWYZHKAOTLEWKK-UHFFFAOYSA-N
SMILES
C1CNCC2=CC=CC=C21
Synonyms (15)
- 2CK
- 1,2,3,4-Tetrahydroleucoline
- 1,3,4-Tetrahydroisoquinoline
- 3,4-dihydro-1H-isoquinoline
- THIQ 6
- Tetrahydroisoquinoline
- tetrahyroisoquinoline
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