12‑Hydroxy Stearic Acid (12‑HSA)

Overview

12-Hydroxy Stearic Acid (12-HSA), with its CAS Number 106-14-9 and INCI Name: Hydroxystearic Acid, stands as a pivotal specialty chemical derived directly from castor oil, a renewable bio-resource. This C18 saturated fatty acid is distinguished by a unique hydroxyl group strategically positioned at the 12th carbon, granting it exceptional reactivity and versatile functionality. Produced through the controlled hydrogenation and subsequent hydrolysis of ricinoleic acid (the primary fatty acid in castor oil), 12-HSA is typically supplied as a white to off-white waxy solid, flakes, or powder at room temperature, transforming into a clear liquid upon heating.

CanCastor's 12-HSA is engineered to deliver superior performance as a rheology modifier, emulsifier, dispersant, and lubricant across a multitude of industrial sectors. Its unique molecular structure, combining a long hydrocarbon chain with a reactive hydroxyl group, makes it an indispensable building block for advanced chemical synthesis and an invaluable additive in formulations requiring enhanced stability, viscosity control, and lubricity. Unlike its derivative, methyl-12-hydroxystearate (the methyl ester of 12-HSA often used as a low-odor, waxy solid or high-viscosity liquid depending on temperature), 12-HSA itself serves as a foundational intermediate, leveraging its inherent acidic and hydroxyl functionalities to create a diverse range of downstream products and directly improve end-product performance.

Key Physical & Chemical Properties

• CAS Number: 106-14-9
• INCI Name: Hydroxystearic Acid
• Empirical Formula: C18H36O3
• Molecular Weight: 300.48 g/mol
• Appearance: White to off-white flakes/powder
• Melting Point: 70-80 °C
• Acid Value: 175-185 mg KOH/g
• Saponification Value: 180-190 mg KOH/g
• Iodine Value: Max 4.0
• Hydroxyl Value: 150-165 mg KOH/g
• Color (Gardner): Max 2.0