C8H5ClS
168.64 g/mol
Research ReagentWarning
4-chlorobenzo[b]thiophene
CAS66490-33-3EC964-933-3
Category
Research Reagent
Compound Class
Heterocycle
Primary Use
Research Compound
4-Chlorobenzo[b]thiophene is a chlorinated heterocyclic compound used as a research reagent. Its structure features a fused benzene and thiophene ring system with a chlorine substituent, making it valuable for constructing diverse heterocyclic scaffolds in laboratory synthesis.
Research chemical for heterocyclic synthesisBuilding block for organic synthesis
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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pharmaceutical intermediate
Safety Reference
Warning
H302Harmful if swallowed
H312Harmful in contact with skin
H315Causes skin irritation
H319Causes serious eye irritation
H332Harmful if inhaled
H335May cause respiratory irritation
Customs Tariff Classification
The international HS code for 4-chlorobenzo[b]thiophene (CAS 66490-33-3) is 2934.99.
HS code (international, 6-digit)
2934.99
EU CN code (8-digit)
2934 99 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
4-chloro-1-benzothiophene
InChIKey
YGYUMNQONHLLNC-UHFFFAOYSA-N
SMILES
C1=CC2=C(C=CS2)C(=C1)Cl
Synonyms (6)
- 4-CHLORO-1-BENZOTHIOPHENE
- 4-chlorobenzo[b]thiophene
- 4-chlorobenzothiophene
- Benzo[b]thiophene, 4-chloro-
- Brexpiprazole Impurity 18
- chlorobenzo[b]thiophene
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