3-Ethenyl-5-hydroxybenzoic acid (commonly referred to as 3-hydroxy-5-vinylbenzoic acid) is a trifunctional aromatic organic compound. Designated under the Chemical Abstracts Service registry as CAS No. 2149973-73-7, this molecule serves primarily as a specialized organic building block in advanced chemical synthesis and materials research. Because it possesses three distinct types of chemical reactivity (acidic, phenolic, and vinylic), 3-ethenyl-5-hydroxybenzoic acid is targeted for specialized niche applications rather than bulk commodity use.

Organic Building Block (Synthesis)

The compound serves as a structured scaffold in fine chemical synthesis. The asymmetric positioning of its functional groups allows medicinal chemists and material scientists to selectively react one group while leaving others intact. This makes it valuable for creating complex pharmaceuticals, agrochemicals, or specialized organic intermediates.

Functionalized Polymers and Resins

The vinyl (−CH=CH2​) moiety allows this compound to act as a monomer or co-monomer in polymer chemistry.

It can undergo radical or coordination polymerization to yield polystyrene-like backbones with pendant phenolic and carboxylic acid groups.

These embedded chemical groups can act as active sites for cross-linking, chelating metals, or modifying the hydrophilic/hydrophobic balance of smart polymers and coatings.

Material Science and MOFs

Functionalized benzoic acids are widely explored as linkers in the synthesis of Metal-Organic Frameworks (MOFs) or Covalent Organic Frameworks (COFs). The presence of the vinyl group offers post-synthetic modification (PSM) pathways, allowing researchers to alter the internal pore properties of materials after the framework has been assembled.

Handling and Storage Guidelines

Handling Precautions: Due to the reactivity of the vinyl group (which can undergo spontaneous polymerization if exposed to heat or light) and the presence of the acidic/phenolic groups, it is classified as a hazardous substance requiring standard laboratory personal protective equipment (PPE), including gloves, protective eyewear, and a lab coat.

Storage Conditions: To prevent thermal degradation or unwanted polymerization, the compound must be kept in a tightly sealed container, stored in a dark place, protected from moisture, and maintained under refrigerated conditions (typically 2–8°C).

Product:2149973-73-7,MOFs,COFs,Electronic Chemicals