Magnesium stearate

Product Details

CasNo： 557-04-0

MF： 2(C18H35O2).Mg

Appearance： powder

Delivery Time： 15 days

Packing： 25kg/bag

Purity： 99%

• Basic Information
  • Chemical Formula: C36​H70​MgO4​
  • Molecular Weight: 591.24
  • CAS Number: 557 - 04 - 0
  • Appearance and Properties: White, fine powder without sand, slightly odoriferous, and has a slippery feel when in contact with the skin.
  • Density: Approximately 1.028 g/cm³
  • Melting Point: ≥88.5℃
  • Solubility: Insoluble in water, ethanol and ether, soluble in hot water and hot ethanol.
• Quality Standards
  • Magnesium Oxide Content: 6.7% - 7.5%
  • Sulfate: ≤0.6%
  • Chloride: ≤0.15%
  • Heavy Metals: ≤5 ppm
• Performance Characteristics
  • Good Lubricity: It has good lubricity, which can reduce the kinetic energy by 5% - 20% during tableting, and decrease the friction between particles and dies, making the tableting process smoother.
  • Strong Hydrophobicity: It is insoluble in water and has certain hydrophobicity, which can prevent drugs from absorbing moisture to a certain extent and help maintain the stability of drugs.
  • Excellent Dispersibility: It has good dispersibility, which can make the materials mix more evenly and ensure the consistency of product quality.
• Production Methods
  • Reaction Method: It is prepared by the reaction of stearic acid with magnesium hydroxide or magnesium salts.
  • Melting Method: Stearic acid and magnesium salts are heated to a melting state, and magnesium stearate is formed by reaction at high temperature.
  • Mechanical Mixing Method: Physical means are used to uniformly mix stearic acid and magnesium salts.
• Application Fields
  • Pharmaceutical Industry: It is mainly used as a lubricant, anti - sticking agent and glidant, especially suitable for the granulation of oily and extractive drugs. It can also be used as a filter aid, clarifying agent and defoaming agent, as well as a suspending agent and thickening agent for liquid preparations.
  • Food Industry: As a food additive, it can be used as an anti - caking agent, emulsifier, etc. It is used to improve the tableting performance of tableted foods such as preserved fruits, milk tablets and candies, and enhance the taste and appearance of products.
  • Cosmetics Industry: It is often used to adjust the texture of cosmetics, improve their spreadability and skin feel, and can enhance the adhesiveness and lubricity of powder products.
• Packaging and Storage
  • Packaging: Usually 25 Kg/bag, packaged in plastic - lined woven bags.
  • Storage: It should be stored in a cool and dry place, away from sunlight and rain, and the storage period is generally 12 months.