Destiny Chemicals

MAGNESIUM STEARATE

Chemical Identification

• Product Name: Magnesium Stearate
• Chemical Name: Magnesium bis(octadecanoate)
• Synonyms:
  • Magnesium octadecanoate
  • Stearic acid magnesium salt
• Molecular Formula: Mg(C₁₈H₃₅O₂)₂
• Molecular Weight: ≈ 591.27 g/mol
• CAS Number: 557-04-0
• EC Number: 209-150-3

Physical & Chemical Properties

Manufacturing Process (Brief)

Magnesium stearate is produced by reaction of stearic acid with magnesium salts (such as magnesium oxide or magnesium hydroxide):

Stearic Acid + MgO / Mg(OH)₂ → Magnesium Stearate + Water

It is then filtered, dried, milled, and sieved to obtain a fine powder.

Key Functional Properties

✅ Lubricant
✅ Anti-adherent
✅ Glidant (improves powder flow)
✅ Release agent
✅ Hydrophobic coating agent

Applications & Uses

Pharmaceutical Industry (Major Use)

• Tablet & capsule lubricant
• Prevents sticking to punches and dies
• Improves powder flow during compression
• Typical usage level: 0.25 – 2.0 %

Cosmetics & Personal Care

• Face powders, compact powders
• Creams & lotions
• Improves texture and spreadability
• Mattifying agent

Food Industry (Food Grade – E470b)

• Anti-caking agent
• Flow aid in powdered food products
• Used as excipient in dietary supplements

Industrial Uses

• Rubber & plastic processing (release agent)
• Paints & coatings
• Cable compounds
• PVC stabilizer aid

Safety & Handling

• Toxicity: Low / non-toxic
• Skin contact: Generally safe
• Inhalation: Avoid dust inhalation
• Eye contact: May cause mild irritation

Storage Conditions

• Store in cool, dry place
• Protect from moisture
• Keep container tightly closed
• Shelf life: 24–36 months (proper storage)