Undecylenic Acid

Overview

Undecylenic Acid (CAS: 112-38-9; INCI: Undecylenic Acid), also known as 10-Undecenoic Acid, is a premium, high-purity organic unsaturated fatty acid meticulously derived from Ricinus communis (castor oil) through a precisely controlled thermal cracking process. At CanCastor, our industrial chemists leverage decades of expertise in oleochemistry to produce this critical derivative, ensuring exceptional quality and consistency for diverse industrial applications. It typically presents as a colorless to pale yellow liquid, solidifying into a low-melting solid below 23°C, characterized by its mild, distinctive fatty acid odor. Our rigorous production standards ensure compliance with stringent global pharmacopoeial monographs, including USP (United States Pharmacopeia) and BP (British Pharmacopoeia), making it a trusted ingredient for sensitive formulations.

This unique C11 monounsaturated fatty acid boasts a terminal double bond and a carboxylic acid group, imparting versatile chemical reactivity. Its efficacy as an antifungal agent, particularly against dermatophytes, is well-documented in clinical and pharmaceutical literature, making it indispensable in dermatological and personal care sectors. Beyond its well-known fungistatic properties, Undecylenic Acid serves as a vital intermediate in synthesizing a wide array of specialized chemicals, including fragrances, polymers, and synthetic lubricants, demonstrating its broad utility across multiple high-value industries.

Key Physical & Chemical Properties

• Chemical Name: 10-Undecenoic Acid
• CAS Number: 112-38-9
• EINECS Number: 203-965-8
• Molecular Formula: C₁₁H₂₀O₂
• Molecular Weight: 184.28 g/mol
• Appearance: Colorless to pale yellow liquid or low-melting solid (below 23°C)
• Odor: Characteristic mild fatty acid odor
• Specific Gravity (25°C): 0.910 - 0.913
• Refractive Index (25°C): 1.4470 - 1.4500
• Congealing Point: Not above 23°C (USP grade)
• Acid Value: 295 - 305 mg KOH/g
• Iodine Value: 180 - 190 g I₂/100g
• Assay (GC): Min 98.0%