Description

Octadecanoic Acid 2-Hydroxy-1-Methylethyl Ester is a high-purity fatty acid ester derived from stearic acid and propylene glycol. This compound serves as a versatile intermediate and functional additive, valued for its emulsifying, lubricating, and conditioning properties. It is essential for formulators and manufacturers in the personal care, cosmetics, and specialty chemical industries seeking reliable, high-quality raw materials.

Application

• Personal Care & Cosmetics: Acts as a key emollient, thickener, and opacifying agent in creams, lotions, and makeup formulations.
• Plastic & Polymer Industry: Functions as an internal lubricant and processing aid to improve flow and mold release in polymer compounding.
• Textile & Fiber Processing: Used as a softening agent and lubricant for synthetic fibers and yarns to enhance handle and reduce friction.
• Metalworking Fluids: Serves as a component in synthetic and semi-synthetic lubricants and coolants, providing lubrication and corrosion inhibition.
• Food Contact Materials: Employed as an additive in polymers and coatings intended for food packaging applications.
• Industrial Lubricants & Greases: Imparts lubricity and stability in specialty grease and oil formulations.

Basic Information

Product Name	Octadecanoic Acid 2-Hydroxy-1-Methylethyl Ester
CAS No.	3539-36-4
Molecular Formula	C21H42O3
Molecular Weight	342.56 g/mol
Synonyms	Propylene Glycol Monostearate; PGMS; 2-Hydroxypropyl Octadecanoate; 1,2-Propanediol Monooctadecanoate; Stearic Acid, Monoester with 1,2-Propanediol; α-Stearoyl-ω-hydroxy-poly(oxy-1,2-ethanediyl); EINECS 222-580-1; 1,2-Propanediol, 1-octadecanoyl-
EINECS	222-580-1

Quality Control

Our Octadecanoic Acid 2-Hydroxy-1-Methylethyl Ester is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing to ensure it meets precise specifications for identity, purity, and performance. Certificates of Analysis (COA) documenting key parameters are available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); containers must be kept tightly sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	White to off-white waxy solid
Identification (IR)	Conforms
Assay (GC)	≥ 98.0%
Acid Value	≤ 5.0 mg KOH/g
Saponification Value	155 - 175 mg KOH/g
Hydroxyl Value	150 - 180 mg KOH/g
Melting Point	35 - 40 °C
Loss on Drying	≤ 1.0%

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