Stearic Acid

Stearic Acid (CAS 57-11-4) – Cosmetic Grade Fatty Acid

Stearic Acid is a saturated long-chain fatty acid widely used in cosmetic, pharmaceutical, personal care, candle, rubber, and industrial applications. It functions primarily as an emulsifying agent, thickener, stabilizer, and surfactant component in a wide range of formulations.

Due to its excellent thickening and consistency-enhancing properties, Stearic Acid is one of the most essential raw materials in cream, lotion, soap, and cosmetic manufacturing.

Chemical & Technical Information

• Chemical Name: Stearic Acid

• IUPAC Name: Octadecanoic Acid

• Molecular Formula: C₁₈H₃₆O₂

• Molecular Weight: 284.48 g/mol

• CAS Number: 57-11-4

• Appearance: White waxy flakes, beads, or powder

• Odor: Mild fatty odor

• Solubility: Insoluble in water; soluble in alcohol and oils

• Type: Saturated fatty acid

Key Functions in Formulation

• Emulsifier (with alkaline agents)

• Thickening agent

• Hardening agent

• Emulsion stabilizer

• Surfactant intermediate

• Viscosity enhancer

Stearic Acid improves product texture, structure, and stability in both oil-based and emulsion systems.

Applications of Stearic Acid

Cosmetic & Personal Care Products

Stearic Acid is widely used in:

• Creams and lotions

• Facial cleansers

• Body butters

• Shaving creams

• Bar soaps

• Deodorants

In emulsified systems, it helps create rich, stable, and smooth textures.

Soap & Detergent Manufacturing

A major raw material in:

• Bar soap production

• Liquid soap formulations

• Surfactant blends

It contributes to hardness and lather quality in soap bars.

Pharmaceutical Applications

Used in:

• Tablet manufacturing (lubricant and binder systems)

• Ointments and topical creams

• Controlled-release formulations

Its stability and compatibility make it suitable for regulated formulations.

Industrial Uses

• Candle production

• Rubber processing

• Plastic additives

• Lubricants

• Metal processing

Stearic Acid is also widely used as a processing aid in various industrial sectors.

Why Stearic Acid Is Essential in Manufacturing

Stearic Acid remains one of the most in-demand fatty acids globally because it:

• Enhances cream stability

• Improves product consistency

• Increases formulation thickness

• Acts as a reliable emulsifying component

• Is compatible with a wide range of ingredients

Its multifunctional nature makes it indispensable in cosmetic and industrial raw material supply chains.

Storage & Handling

• Store in a cool, dry, well-ventilated area

• Keep container tightly sealed

• Protect from moisture and excessive heat

• Avoid direct sunlight exposure

Stearic Acid continues to be a foundational raw material in cosmetic, pharmaceutical, and industrial manufacturing due to its thickening efficiency, formulation stability, and global demand across multiple industries.