3-Cyclopentene-1-carboxylic acid CAS No.7686-77-3

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3-Cyclopentene-1-carboxylic Acid (CAS No. 7686-77-3) 

1. Basic Information

Chemical Name: 3-Cyclopentene-1-carboxylic acidSynonyms: Cyclopent-3-ene-1-carboxylic acidCAS Number: 7686-77-3Molecular Formula: C₆H₈O₂Molecular Weight: 112.13 g/molAppearance: Colorless to pale yellow liquid or low-melting solidOdor: Characteristic carboxylic acid odor

2. Physical and Chemical Properties

Melting Point: ~30-35°C (86-95°F)Boiling Point: ~220-225°C (428-437°F)Density: ~1.10 g/cm³ at 20°CSolubility:Water: Slightly solubleOrganic solvents: Soluble in ethanol, ether, acetoneRefractive Index: ~1.48 at 20°CpKa: ~4.5 (carboxylic acid proton)

3. Chemical Structure

      COOH     /    C   / \  C   C  \\ /   C

4. Hazards (GHS Classification)

Skin Corrosion/Irritation: Causes skin irritation (H315)Serious Eye Damage: Causes serious eye irritation (H319)Environmental Hazards: Not classifiedNFPA Rating: Health 2, Flammability 1, Reactivity 0

5. Storage and Handling

Storage:Store in tightly sealed containersKeep in cool, dry place away from oxidizersHandling:Use gloves (nitrile) and eye protectionWork in well-ventilated area

6. Applications

Organic Synthesis: Intermediate for pharmaceuticals and agrochemicalsPolymer Chemistry: Monomer for specialty polymersResearch Chemical: Used in Diels-Alder reactions

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