Stearic acid - From soap base hardness to PVC release agent

🔍 Product Overview

Stearic acid (chemical name: octadecanoic acid, CAS number: 57-11-4, molecular formula: C₁₇H₅₅COOH) is a naturally occurring long-chain saturated fatty acid. At room temperature, it appears as white, odorless, or slightly oily-smelling waxy solid flakes or granules.🧼

It is widely found in animal and plant fats and oils (such as butter and palm oil) and serves as a versatile base material in industrial production.🔧 Known for its excellent lubricity, emulsifying stability, and chemical stability, it is widely used in the cosmetics, plastics, rubber, pharmaceutical, and food industries.

📌 Key Specifications 

Appearance: White flakes or granular solid 

Acid value: 196–211 mg KOH/g 

Iodine value: ≤ 2.0 g I₂/100g 

Saponification value: 195–212 

Melting point: 54–58 °C

Moisture Content: ≤ 0.2% 

Ash Content: ≤ 0.05% 

Color (Gardner): ≤ 2 

💡 Grade Selection: Available in Food Grade (FCC) 🍎, Cosmetic Grade (USP) 💄, and Industrial Grade products

🚀 Main application areas:

🧴 Personal care industry

Soap base: Provides hardness and foam stability

Skin care products: Co-emulsifier & thickener for creams/lotions

Cosmetics: Lubricant & structural stabilizer for lipstick/foundation

🔩 Plastics and Rubber

Plastics: PVC external lubricant & release agent

Rubber: Vulcanization activator → Enhances cross-linking efficiency and weather resistance

💊 Pharmaceuticals

Tablet lubricant & suppository matrix (body temperature-controlled release)

🍫 Food Industry

Candy polishing agent | Baking release agent | Fat plasticity regulator

✨ Other fields

Candles (hardness/burning regulation) | Metal polishing | Textile lubricant/waterproofing agent

📦 Packaging and Storage

Packaging Specifications:

📍 25kg/bag (cardboard box/woven bag lined with PE bag)

Storage Conditions: 

🌡️ Cool, dry, well-ventilated area | Avoid exposure to light | Temperature ≤30°C | Humidity ≤70% 

⚠️ Keep away from oxidizers, strong acids, and heat sources! 

Shelf Life: 

⏳ Unopened shelf life: 2 years