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🧪 Stearic Acid

Octadecanoic Acid | INCI: Stearic Acid | CAS: 57-11-4

INCI Information

INCI Name
Stearic Acid
Common Name
Octadecanoic Acid
CAS Number
57-11-4
Category
Emulsifier / Emollient
Molecular Formula
C₁₈H₃₆O₂
Molecular Weight
284.48 g/mol
Appearance
White, waxy flakes or powder
Solubility
Insoluble in water, soluble in oils and alcohols
Typical Concentration
1% – 10%
pH Range
Not applicable (fatty acid)
Functions:
Emulsifier (W/O)EmollientThickenerHardener
Available Purity Grades:
  • 95% (Industrial)
  • 98% (Cosmetic)
  • 99% (Triple-pressed)

💰 Indicative Price Range (Bulk)

Typical B2B pricing across verified suppliers
$2 – $5 $/kg
Prices vary by purity, MOQ, and order volume. Always request formal quotes.

📖 About Stearic Acid

Stearic Acid is a long-chain fatty acid that adds hardness, opacity, and a luxurious feel to bar soaps, lotions, and stick formulations. It's one of the most economical raw materials in cosmetics.

🛒 Purchasing Guide & Tips

❓ Frequently Asked Questions

❓ Is Stearic Acid vegan?

Typically derived from animal fat (tallow) or vegetable oils (coconut/palm). Request plant-derived for vegan formulations.

❓ What's the difference between stearic acid and cetyl alcohol?

Stearic acid is a fatty acid (acidic); Cetyl alcohol is a fatty alcohol (neutral). They have different functions and skin feel.

❓ Why use it in lotions?

It reacts with alkalis to form soap, which acts as an emulsifier. Also adds body and opacity to formulations.

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