Description

sec-Butyl Stearate is a branched-chain fatty acid ester derived from stearic acid and sec-butanol. This compound serves as a versatile intermediate and functional additive, valued for its lubricating and plasticizing properties. It is primarily utilized in the manufacturing of polymers, lubricants, and personal care formulations where consistent performance and purity are critical.

Application

• Polymer & Plastic Additive: Acts as an internal lubricant and plasticizer in PVC, polystyrene, and other thermoplastic processing to improve flow and reduce friction.
• Metalworking Fluids: Used as a lubricity agent and corrosion inhibitor in synthetic and semi-synthetic cutting oils and drawing compounds.
• Personal Care & Cosmetics: Functions as an emollient and skin-conditioning agent in creams, lotions, and makeup products.
• Textile Auxiliaries: Employed as a softening agent and lubricant for synthetic fibers and yarns to enhance processability.
• Rubber Industry: Serves as a processing aid and mold release agent in the production of various rubber goods.
• Adhesives & Sealants: Imparts flexibility and improves workability as a plasticizer in adhesive formulations.
• Paints & Coatings: Used as a flow modifier and coalescing agent to improve film formation and application properties.
• Chemical Intermediate: A key starting material for the synthesis of more complex esters and specialty chemicals.

Basic Information

Product Name	sec-Butyl Stearate
CAS No.	55195-02-3
Molecular Formula	C22H44O2
Molecular Weight	340.59 g/mol
Synonyms	Butyl Stearate, secondary; 2-Butyl Octadecanoate; Stearic Acid, sec-Butyl Ester; Octadecanoic Acid, 1-Methylpropyl Ester; 1-Methylpropyl Octadecanoate; sec-Butyl Octadecanoate; 2-Butyl Stearate
EINECS	259-519-5

Quality Control

Our sec-Butyl Stearate is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing to ensure it meets precise chemical and physical specifications. A Certificate of Analysis (COA) detailing purity, identity, and key parameters is provided with each shipment to guarantee traceability and compliance with your requirements.

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). Keep away from strong oxidizing agents, acids, and heat sources to maintain product integrity.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (GC)	≥ 98.0%
Acid Value	≤ 1.0 mg KOH/g
Saponification Value	160 - 170 mg KOH/g
Iodine Value	≤ 2.0 g I2/100g
Moisture (KF)	≤ 0.1%
Specific Gravity (20°C)	0.855 - 0.865
Refractive Index (20°C)	1.442 - 1.446

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