trans-3-Hydroxycinnamic acid
trans-3-Hydroxycinnamic acid (CAS 14755-02-3), also known as m-coumaric acid, is a naturally occurring hydroxycinnamic acid with the molecular formula HOC6H4CH=CHCO2H and a molar mass of 164.16 g/mol. Supplied as a crystalline solid at 99% assay, it is a phenolic C9 building block carrying a phenol and an a,b-unsaturated carboxylic acid. Tech Serve Solutions supplies it for organic synthesis, phytochemical reference work and nutrition research worldwide.
- IUPAC
- m-Coumaric acid
- Synonyms
- trans-3-Hydroxycinnamic acidm-Coumaric acid3-Hydroxycinnamic acid(E)-3-(3-hydroxyphenyl)acrylic acid(E)-3-(3-hydroxyphenyl)prop-2-enoic acid3-Hydroxy-trans-cinnamic acid

Organic synthesis building block
Serves as a C9 phenolic building block in chemical synthesis. Its phenol and a,b-unsaturated carboxylic acid groups offer multiple handles for esterification, amidation, etherification and conjugate-addition chemistry.
Phytochemical reference standard
Used as an analytical reference for a hydroxycinnamic acid found in plant material such as bilberry (Vaccinium myrtillus). Supports identification and quantification of phenolic acids by HPLC and related techniques.
Nutrition and food-science research
Applied in nutrition and phytochemical research as a representative dietary phenolic acid. Useful when studying the occurrence and behaviour of hydroxycinnamic acids in foods, spices and herbs.
Cell biology and life-science studies
Used as a defined phenolic compound in cell-biology and related laboratory investigations. Suited to method development and exploratory work requiring a well-characterised hydroxycinnamic acid.
| Molecular weight | 164.16 |
|---|---|
| Linear formula | HOC6H4CH=CHCO2H |
| Assay | 99% |
| Melting point | 193-195 °C(lit.) |

Hazard statements
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38 |
| Safety statements (S) | 26-36 |
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 trans-3-Hydroxycinnamic acid used for?
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It is used mainly as a C9 phenolic building block in organic synthesis and as a reference standard for nutrition, phytochemical and cell-biology research. As a naturally occurring hydroxycinnamic acid (m-coumaric acid), it also supports the study of dietary phenolic acids in plants and foods.
What is the CAS number and molecular formula of trans-3-Hydroxycinnamic acid?
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Its CAS number is 14755-02-3 and its linear formula is HOC6H4CH=CHCO2H (molecular formula C9H8O3), with a molecular weight of 164.16 g/mol. It is also known as m-coumaric acid; the MDL number is MFCD00004390.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies trans-3-Hydroxycinnamic acid at 99% assay as a crystalline solid (melting point 193-195 °C), suitable for research and synthesis. A certificate of analysis is provided with each batch. We do not represent it as a USP, BP, EP or pharmacopoeia grade.
What are the safety and handling requirements?
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It is classified GHS07 with the signal word Warning and hazard statements H315 (causes skin irritation), H319 (causes serious eye irritation) and H335 (may cause respiratory irritation). Handle with gloves, eye protection and an N95-type dust mask, avoid dust formation, and work with adequate ventilation. It is assigned WGK 3 (water-hazard class) in Germany. Always consult the SDS before use.
How is trans-3-Hydroxycinnamic acid packed, shipped and exported?
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It is packed as a solid in tightly closed containers sized to order, from gram quantities to bulk, and labelled to GHS standards with accompanying documentation. Tech Serve Solutions exports globally with appropriate transport paperwork and a certificate of analysis for every consignment.
How do I request a sample or quote?
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Contact Tech Serve Solutions with your required quantity, packaging and destination, quoting CAS 14755-02-3. We will confirm availability, lead time and export terms, and arrange a sample or quotation.
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