Description

Octadecanoic Acid, 4-Hydroxy-, Monosodium Salt is the monosodium salt derivative of 4-hydroxystearic acid, a functionalized fatty acid. This compound is valued for its surfactant and emulsifying properties derived from its amphiphilic structure, combining a long hydrophobic alkyl chain with a hydrophilic carboxylate and hydroxyl group. It serves as a key intermediate and functional additive in the production of specialty chemicals, personal care products, and industrial formulations where controlled solubility and surface activity are required.

Application

• Surfactant & Emulsifier Intermediate: Acts as a building block for synthesizing more complex anionic surfactants and emulsifiers used in detergents and cleaning products.
• Personal Care Formulations: Utilized in creams, lotions, and cosmetic products for its emulsifying and skin-conditioning properties.
• Textile & Leather Processing: Functions as a softening agent, lubricant, or auxiliary chemical in fiber treatment and leather finishing processes.
• Polymer & Plastic Additive: Serves as an internal or external lubricant and processing aid in the manufacture of plastics and synthetic resins.
• Metalworking Fluids: Incorporated into formulations as a corrosion inhibitor and lubricity additive.
• Research & Development: Used as a standard or reagent in chemical research, particularly in studies involving fatty acid salts and their applications.

Basic Information

Product Name	Octadecanoic Acid, 4-Hydroxy-, Monosodium Salt
CAS No.	49556-63-0
Molecular Formula	C18H35NaO3
Molecular Weight	322.46 g/mol
Synonyms	Sodium 4-Hydroxystearate; Monosodium 4-Hydroxystearate; 4-Hydroxystearic Acid Sodium Salt; Sodium 4-Hydroxyoctadecanoate; 4-Hydroxy Stearic Acid Sodium Salt; 4-Hydroxyoctadecanoic Acid, Monosodium Salt; 4-Hydroxy Stearate, Sodium Salt
EINECS	Contact for details

Quality Control

Our Octadecanoic Acid, 4-Hydroxy-, Monosodium Salt is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure identity, purity, and consistency. Certificates of Analysis (COA) documenting key parameters such as assay, impurity profile, and physical characteristics are provided and available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at controlled room temperature (15-25°C). This material is hygroscopic (moisture-sensitive). Keep the container tightly sealed to prevent absorption of atmospheric moisture, which can affect product quality and flow properties.

Specification

Item	Specification
Appearance	White to off-white powder or flakes
Identification (IR)	Conforms to structure
Assay (Titration)	≥ 98.0 %
Loss on Drying	≤ 2.0 %
Heavy Metals (as Pb)	≤ 10 ppm
Residue on Ignition (Sulfated Ash)	Reported on COA
pH (in solution)	7.0 - 9.0

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