Synonym(s): Octadecanoic acid

Description

CG 201, Stearic acid, is a fatty acid obtained by saponification of the triglycerides. It is a saturated linear C18 carboxylic acid. The triglyceride of stearic acid is very common in nature, particularly in animal fat. Industrial stearic acid is typically a mixture of stearic acid and other fatty acid impurities, with palmitic acid as the major one. At ambient, stearic acid is a white waxy solid. Stearic acid is widely used in many industries.

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Specification

Property	Specification	Typical Value
Appearance, 25 °C	White waxy solid	White waxy solid
Acid Value, mg KOH/g	200 - 210	205
Saponification Value, mg KOH/g	200 - 210	205
Iodine Value, g I2/100g	1.0 max	0.5
Titer temperature, °C	Report	60
Moisture, wt%	0.3 max	0.1

Properties

Chemical Formula	C18H36O2
Molecular Weight	284.48
Appearance, 25 °C	White solid
Melting Point	69 °C (156 °F)
Initial boiling point	361 °C (682 °F), decomposes
Density, 20 °C, g/cm3	0.94
Solubility in water, 20 °C, g/100g	0.00029

Applications

CG 201, Stearic acid, is useful for a variety of applications, which include, but are not limited to,

Chemical intermediate
Emulsifier
Detergent
Rust inhibitor
Softening and release agent

CG 201, Stearic acid, is widely used in many industries, which include, but are not limited to, Food, plastics, lubricants, personal care, cosmetics, and pharmaceuticals, etc.

Manufacturing Process

Stearic acid is typically manufactured by hydrolyzing triglycerides. The crude product is a mixture of many fatty acids. The refinement usually is achieved by distillation.

Stearic acid may also be manufactured by hydrogenation of oleic acid.

Chemical Reactions

Stearic acid can react with inorganic bases to form stearate salts, such as Zinc Stearate, which has an application in plastics.

Stearic acid can react with organic bases, such as oleylamine, to form organic salts.

Like other carboxylic acids, Stearic acid reacts with alcohols to form esters via an esterification reaction.

Spectra

NMR

SDBS : https://sdbs.db.aist.go.jp/ , National Institute of Advanced Industrial Science and Technology, January, 23rd, 2025

IR

SDBS : https://sdbs.db.aist.go.jp/ , National Institute of Advanced Industrial Science and Technology, January, 23rd, 2025

Packaging

25 kg / bag, 55 lbs / bag

Other packaging sizes available upon request

Documents

TDS

CG 201 Stearic Acid High Quality, CAS 57-11-4, N-Octadecanoic Acid