What is 12-Hydroxy Stearic Acid CAS 106-14-9?

CAS 106-14-9 is 12-hydroxystearic acid, also called 12-HSA, a saturated hydroxy fatty acid with the molecular formula C18H36O3. It is produced from hydrogenated castor oil and is supplied as white to pale yellow flakes or powder.

What are the key specification values for 12-HSA?

Typical industrial specifications include a melting point around 74-78 degrees C, hydroxyl value about 155-165 mg KOH/g, and acid value about 175-185 mg KOH/g. The hydroxyl value is especially important because the C12 hydroxyl group controls grease thickening performance.

Why is 12-Hydroxy Stearic Acid used in lithium grease?

12-HSA reacts with lithium hydroxide or other bases to form metal soap fibers that thicken mineral oil into grease. The C12 hydroxyl group helps create a stable fibrous matrix, giving the finished grease heat resistance, shear stability, and water resistance.

How is 12-HSA different from ordinary stearic acid?

Ordinary stearic acid has no hydroxyl group, while 12-HSA contains a hydroxyl group at the C12 position. That functional group allows 12-HSA to form the stable metal soap structures required for high-performance greases, whereas standard stearic acid does not provide the same thickening behavior.

Can 12-Hydroxy Stearic Acid CAS 106-14-9 be used in plastics and rubber?

Yes, it is used as an internal lubricant and mold-release agent in PVC, polystyrene, ABS, and rubber compounding. It helps improve flow, surface finish, and release during extrusion or molding while retaining thermal stability.

12-Hydroxy Stearic Acid (12-HSA) CAS 106-14-9

12-Hydroxy stearic acid (12-HSA), also called 12-hydroxystearic acid, CAS 106-14-9, is a saturated hydroxy C18 fatty acid supplied as white to pale yellow flakes or powder for grease, polymer, and intermediate applications. Confirm the required grade and specification, then request a quotation with COA/TDS/SDS for bulk supply.

CAS: 106-14-9
Synonyms: 12-HSA, Octadecanoic acid 12-hydroxy, Ceritfac G, 12-Hydroxystearic acid, Hydroxystearic acid
Einecs: 203-366-1
Molecular Formula: C18H36O3
Grade: Industrial Grade
Package: 25kg/bag (paper-plastic composite) or bulk jumbo bags

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Product Description

12-Hydroxy Stearic Acid (12-HSA) CAS 106-14-9, also called 12-hydroxystearic acid, is a saturated hydroxy fatty acid with the molecular formula C18H36O3 and EINECS 203-366-1.

Synonyms: 12-HSA; Octadecanoic acid 12-hydroxy; Ceritfac G; 12-Hydroxystearic acid; Hydroxystearic acid.

CAS: 106-14-9.

Molecular formula: C18H36O3.

It is supplied as white to pale yellow flakes or powder with a melting point of about 74-78 °C.

The hydroxyl value is about 155-165 mg KOH/g, acid value about 175-185 mg KOH/g, and iodine value not more than 3.0 g I2/100g.

The saponification value is about 180-190 mg KOH/g, and moisture content is not more than 0.5%.

It is produced from hydrogenated castor oil and contains a hydroxyl group at the C12 position.

In lubricating greases it is the primary raw material for lithium and calcium 12-hydroxystearate greases, providing heat resistance and shear stability.

In plastics and rubber it acts as an internal lubricant and mold-release agent for PVC, polystyrene, and ABS, reducing friction during extrusion.

In chemical intermediates it is used to synthesize specialized esters and amides for coatings and textiles.

In industrial personal-care processing it acts as a consistency regulator in wax-based formulations and professional-grade salves.

Store in a cool, dry, well-ventilated area, protected from direct sunlight and moisture, and away from strong oxidizing agents.

During handling avoid dust formation and inhalation of fine particles; use safety glasses with side shields and nitrile or PVC gloves.

Every batch is tested for hydroxyl value and iodine value to guarantee performance in grease thickening.

Advanced vacuum distillation and hydrogenation provide high purity and consistent thermal properties with batch-to-batch traceability.

Confirm appearance, melting point, hydroxyl value, acid value, iodine value, saponification value, moisture, and grade as required.

The page is an RFQ entry point and does not state stock, price, MOQ, or fixed lead time.

For an RFQ, state the intended application, required grade, quantity, packaging, destination, and document needs.

FAQ - Technical & Supply Chain

Q:
What is 12-Hydroxy Stearic Acid CAS 106-14-9?

A: CAS 106-14-9 is 12-hydroxystearic acid, also called 12-HSA, a saturated hydroxy fatty acid with the molecular formula C18H36O3. It is produced from hydrogenated castor oil and is supplied as white to pale yellow flakes or powder.
Q:
What are the key specification values for 12-HSA?

A: Typical industrial specifications include a melting point around 74-78 degrees C, hydroxyl value about 155-165 mg KOH/g, and acid value about 175-185 mg KOH/g. The hydroxyl value is especially important because the C12 hydroxyl group controls grease thickening performance.
Q:
Why is 12-Hydroxy Stearic Acid used in lithium grease?

A: 12-HSA reacts with lithium hydroxide or other bases to form metal soap fibers that thicken mineral oil into grease. The C12 hydroxyl group helps create a stable fibrous matrix, giving the finished grease heat resistance, shear stability, and water resistance.
Q:
How is 12-HSA different from ordinary stearic acid?

A: Ordinary stearic acid has no hydroxyl group, while 12-HSA contains a hydroxyl group at the C12 position. That functional group allows 12-HSA to form the stable metal soap structures required for high-performance greases, whereas standard stearic acid does not provide the same thickening behavior.
Q:
Can 12-Hydroxy Stearic Acid CAS 106-14-9 be used in plastics and rubber?

A: Yes, it is used as an internal lubricant and mold-release agent in PVC, polystyrene, ABS, and rubber compounding. It helps improve flow, surface finish, and release during extrusion or molding while retaining thermal stability.

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