Description

10(9)-Hydroxystearic Acid is a monohydroxy derivative of stearic acid, a versatile fatty acid derivative with a hydroxyl group on the carbon chain. This functionalization makes it a valuable intermediate for synthesizing specialized lubricants, surfactants, and personal care ingredients. It is particularly sought after by manufacturers in the cosmetics, polymer, and specialty chemical industries for its ability to modify surface properties and introduce reactive sites into molecules.

Application

• As a key intermediate in the synthesis of estolides and other bio-based lubricants with excellent low-temperature properties.
• In the production of non-ionic surfactants and emulsifiers for cosmetic and industrial formulations.
• As a building block for polymer modification, introducing hydroxyl functionality into polyesters and polyurethanes.
• In personal care products as a skin-conditioning agent and opacifier.
• For the manufacture of corrosion inhibitors and metalworking fluid additives.
• As a precursor in organic synthesis for pharmaceuticals and fine chemicals.

Basic Information

Product Name	10(9)-Hydroxystearic Acid
CAS No.	25498-28-6
Molecular Formula	C₁₈H₃₆O₃
Molecular Weight	300.48 g/mol
Synonyms	10-Hydroxyoctadecanoic Acid; 9-Hydroxyoctadecanoic Acid; 10-Hydroxystearic Acid; 9-Hydroxystearic Acid; Hydroxystearic Acid; 10-HSA; 9-HSA; (+/-)-10-Hydroxystearic Acid
EINECS	247-038-5

Quality Control

Our 10(9)-Hydroxystearic Acid is produced under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure consistent purity and meets defined specifications. A comprehensive Certificate of Analysis (COA) detailing identity, assay, and impurity profiles is provided with every shipment to guarantee traceability and compliance.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive) and easily oxidized; for long-term storage, consider using an inert atmosphere (e.g., nitrogen blanket) to maintain product integrity.

Specification

Item	Specification
Appearance	White to off-white powder or flakes
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Melting Point	75 - 85 °C
Acid Value	175 - 190 mg KOH/g
Hydroxyl Value	170 - 190 mg KOH/g
Loss on Drying	≤ 2.0 %

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.