Magnesium Stearate
Magnesium Octadecanoate, Magnesium Stearic Acid
- CAS
- 557-04-0
- Sectors
- Pharma & Healthcare, Personal Care & Cosmetics, Plastics & Polymers
Magnesium Stearate (CAS 557-04-0) is a white, fine, hydrophobic powder composed of magnesium salts of stearic acid, used as a lubricating and anti-adherent agent in tablet manufacturing, capsules and cosmetics, and as a stabilizer in plastics and rubber.
Typical Properties
| Molecular formula | C18H36O2.1/2Mg |
|---|---|
| Molecular weight | 591.24 g/mol |
| Appearance | white powder |
| Form | Fine Powder |
| Color | White |
| Odor | wh. soft oily powd., tasteless, odorless |
| Melting point | 88 °C |
| Density | 1.028 g/cm³ |
| Water solubility | Insoluble |
| pH | 7 (H2O) (slurry) |
| GHS signal word | Warning · Irritant / harmful |
| HS code | 29157030 |
Typical literature values for identification; lot-specific results are stated on the certificate of analysis (COA) and the safety data sheet (SDS) that accompany every delivery.
Magnesium Stearate
Applications
Widely used as a lubricant in tablet manufacturing, capsules, and cosmetics. It improves powder flow and prevents sticking during compression. In plastics and rubber, it acts as a stabilizer.
Safety & Risks
Inert and non-toxic; excessive inhalation may cause minor respiratory irritation.
Packaging
Supplied in 20–25 kg paper bags or fiber drums. Store in a cool, dry area.