4-Methylcinnamic acid, predominantly trans
4-Methylcinnamic acid (CAS 1866-39-3) is a trans-predominant organic compound with the linear formula CH3C6H4CH=CHCO2H and a molecular weight of 162.19 g/mol. It is supplied by TSS at a minimum purity of 99%. This carboxylic acid serves as a valuable building block in chemical synthesis, particularly within organic chemistry research and development. Its specific structure makes it useful for introducing the 4-methylcinnamoyl moiety into larger molecules.
- Synonyms
- CH3C6H4CH=CHCO2H

Organic Synthesis Intermediate
4-Methylcinnamic acid is employed as a versatile intermediate in the synthesis of more complex organic molecules. Its carboxylic acid and alkene functionalities allow for various chemical transformations.
Research and Development
Utilised in laboratory settings for exploring new synthetic pathways and developing novel compounds. Its defined structure is beneficial for targeted chemical modifications.
Material Science Precursor
Potential applications in material science where its structure can be incorporated into polymers or other advanced materials. Research is ongoing to explore these uses.
| Molecular weight | 162.19 |
|---|---|
| Linear formula | CH3C6H4CH=CHCO2H |
| Assay | 99% |
| Melting point | 196-198 °C(lit.) |
| Protective equipment | Eyeshields, Gloves, type N95 (US), type P1 (EN143) respirator filter |
|---|---|
| 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 4-Methylcinnamic acid primarily used for?
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4-Methylcinnamic acid is primarily used as a building block and intermediate in organic synthesis and chemical research and development.
What are the CAS number and formula for 4-Methylcinnamic acid?
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The CAS number is 1866-39-3, and the linear formula is CH3C6H4CH=CHCO2H.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 4-Methylcinnamic acid with an assay of 99%. TSS does not represent this product as USP, BP, or EP grade.
How should 4-Methylcinnamic acid be handled safely?
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Handle with appropriate personal protective equipment, including eyeshields and gloves. A type N95 (US) or type P1 (EN143) respirator filter may be necessary.
Is 4-Methylcinnamic acid exported by Tech Serve Solutions?
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Yes, Tech Serve Solutions is a specialist global supplier and exporter of fine chemicals, including 4-Methylcinnamic acid.
How can I request a quote or sample?
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Please contact our sales team via the website or phone to request a quotation or a sample of 4-Methylcinnamic acid.
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