3-Bromo-4-methylthiophene
3-Bromo-4-methylthiophene (CAS: 30318-99-1), with the molecular formula C5H5BrS and a molecular weight of 177.06 g/mol, is a halogenated heterocyclic building block. This compound serves as a valuable intermediate in organic synthesis, particularly for the development of novel materials and pharmaceuticals. Its structure, featuring a brominated thiophene ring, allows for versatile functionalization in various chemical transformations.

Organic Synthesis Intermediate
Utilised as a key building block in multi-step syntheses for complex organic molecules. Its reactive bromine atom facilitates cross-coupling reactions and other derivatizations.
Materials Science
Incorporated into the design and synthesis of advanced materials, including organic semiconductors and conductive polymers. The thiophene core is fundamental in many organic electronic applications.
Pharmaceutical Research
Serves as a precursor for the synthesis of potential drug candidates. Halogenated heterocycles are common motifs in medicinal chemistry due to their unique electronic and steric properties.
Reagent for Heterocyclic Chemistry
A useful reagent for introducing the 4-methylthiophene moiety into various molecular frameworks. Enables the construction of diverse heterocyclic structures.
| Molecular weight | 177.06 |
|---|---|
| Empirical formula | C5H5BrS |
| Assay | 95% |
| Boiling point | 179-183 °C/770 mmHg(lit.) |
| Density | 1.584 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.579(lit.) |
| Protective equipment | Eyeshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 78 °C / 172.4 °F |
| Transport (UN / ADR) | UN 1993 / PGIII |
| Water hazard class (WGK, DE) | 3 |
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 3-Bromo-4-methylthiophene used for?
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3-Bromo-4-methylthiophene is primarily used as a building block in organic synthesis for creating complex molecules, as an intermediate in materials science for organic electronics, and in pharmaceutical research.
What is the CAS number and formula for 3-Bromo-4-methylthiophene?
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The CAS number is 30318-99-1 and the empirical formula is C5H5BrS.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 3-Bromo-4-methylthiophene with an assay of 95%. We do not represent this product as USP, BP, or EP grade.
How should 3-Bromo-4-methylthiophene be handled?
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Handle with appropriate personal protective equipment, including eyeshields, gloves, and a suitable respirator, in a well-ventilated area. It is a combustible liquid with a flash point of 78 °C (172.4 °F).
Is 3-Bromo-4-methylthiophene a controlled substance?
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The provided data does not indicate that 3-Bromo-4-methylthiophene is a controlled substance.
How is 3-Bromo-4-methylthiophene packed and shipped?
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3-Bromo-4-methylthiophene is typically packed and shipped according to UN 1993 / PGIII regulations. As a global supplier, Tech Serve Solutions exports fine chemicals worldwide.
How can I request a sample or quote for 3-Bromo-4-methylthiophene?
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Please contact our sales team via the website or phone to request a sample or a quotation for 3-Bromo-4-methylthiophene.
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