2-Propylthiophene TCI P2451

Chemical Identity

CAS No.: 1551-27-5
PubChem: CID 73771·SID 354335225
Formula: C7H10S
Molecular weight: 126.22 g/mol
Purity: >98.0%(GC)
Reference databases: ChemSpider·ECHA

Full identifiers (IUPAC, SMILES, InChIKey)

IUPAC: 2-propylthiophene
SMILES: CCCC1=CC=CS1
InChIKey: BTXIJTYYMLCUHI-UHFFFAOYSA-N

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TCI P2451 2-Propylthiophene (CAS 1551-27-5) is an aromatic heterocyclic compound made of a thiophene ring with a propyl chain at the 2-position. Thiophene is a five-membered, sulfur-containing heterocycle. It is an important building block in synthetic organic chemistry, organic electronic materials and aroma compound research. In the laboratory, 2-propylthiophene is used as a starting material for making more complex thiophene derivatives. It is also used as a model molecule for studying how sulfur-containing heteroaromatic rings react.

Chemists choose this compound because the thiophene ring is electron-rich and readily undergoes electrophilic substitution. The free 5-position is the main site for halogenation, acylation, formylation or lithiation, so further functionalization is predictable and selective. The propyl chain makes the molecule more lipophilic and affects the solubility of the derivatives made from it. This is often useful when designing thiophene oligomers and polymers, where solubility controls how the material can be processed. The compound also has a simple, well-defined structure, which makes it suitable as a model compound or reference standard.

In Indonesian laboratories, this material is relevant to research groups in organic synthesis, organic semiconductor materials and analytical chemistry. University chemistry departments can use it as a substituted heteroaromatic substrate for teaching and research on electrophilic substitution and ring functionalization. Materials science groups developing thiophene-based oligomers and polymers can use it as a precursor or model unit. Analytical laboratories can use it as a well-defined sulfur-containing reference compound when studying related heterocyclic and aroma compounds.

TCI brochures (PDF)

Building Blocks for Organic Semiconductor 2026-03-24 · p. 27

Related TCI products

Synthesis of thiophene derivatives: the free 5-position allows selective halogenation, acylation, formylation or lithiation, giving a clear route to more complex substituted thiophenes.
Organic electronic materials research: the propyl-substituted thiophene unit is useful for designing oligomers and polymers, where the alkyl chain helps control the solubility and processability of the final material.
Reactivity studies of heteroaromatic rings: its simple, well-defined structure makes it a good model molecule for studying electrophilic substitution on electron-rich, sulfur-containing five-membered rings.
Analytical reference work: as a structurally defined compound, it can serve as a comparison standard when identifying or characterizing related thiophene and sulfur-containing heterocyclic compounds.
Aroma compound research: thiophene structures are relevant in flavor and aroma chemistry, so this compound supports studies of sulfur-containing heterocycles in that field.

Brand	TCI (product code P2451)
CAS number	1551-27-5
Molecular formula	—
Purity	—
Category	Chemistry > Building Blocks > Heterocyclic Building Blocks
Pack sizes	standard TCI pack sizes; please ask AMI Scientific which sizes are available
Physical form	see the manufacturer's product documentation
Storage	follow the conditions on the TCI label and Safety Data Sheet

Store 2-Propylthiophene in its original, tightly closed container in a cool, dry, well-ventilated area, away from heat, ignition sources and direct sunlight. Keep it apart from strong oxidizing agents and other incompatible materials. Always follow the storage conditions on the TCI label and Safety Data Sheet. Handle it in a fume hood and wear suitable protective gloves, safety glasses and a lab coat. Avoid breathing vapors and avoid contact with skin and eyes. Close the container right after use to prevent contamination. Dispose of waste according to local regulations and your institution's chemical waste procedures.

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