Products Description of Magnesium Stearate CAS#557-04-0
Magnesium stearate, alternatively termed magnesium octadecanoate, presents as a fine white solid powder under ambient temperature conditions, with a chemical formula of Mg(C₁₈H₃₅O₂)₂.
Classified as the magnesium salt of stearic acid, this compound is chemically structured with one magnesium cation (Mg²⁺) bonded to two stearate anions sourced from stearic acid. Benefiting from its stable physical properties and chemical constitution, magnesium stearate enjoys extensive applicability across pharmaceutical, food, cosmetic and general industrial fields.
Magnesium stearate Chemical Properties
| Melting point | 200 °C (lit.) |
| density | 1.028g/cm3 |
| storage temp. | Inert atmosphere,Room Temperature |
| solubility | alcohol: insoluble |
| form | Fine Powder |
| color | White |
| PH | 7 (H2O) (slurry) |
| Odor | wh. soft oily powd., tasteless, odorless |
| Water Solubility | Insoluble |
| Merck | 145690 |
| BRN | 3919702 |
| Exposure limits | ACGIH: TWA 10 mg/m3; TWA 3 mg/m3 |
| Stability: | Stable. Incompatible with strong oxidizing agents. |
| InChIKey | DRJIJXNWSSRTTE-UHFFFAOYSA-M |
| LogP | 8.216 (est) |
| CAS DataBase Reference | 557-04-0(CAS DataBase Reference) |
| EPA Substance Registry System | Magnesium stearate (557-04-0) |
| Hazard Codes | Xi |
| Risk Statements | 36/37/38 |
| Safety Statements | 26-37/39 |
| WGK Germany | - |
| RTECS | WI4390000 |
| TSCA | Yes |
| HS Code | 29157030 |
| Hazardous Substances Data | 557-04-0(Hazardous Substances Data) |
| Toxicity | LD50 orally in Rabbit: > 2000 mg/kg |
Product Application of Magnesium Stearate CAS#557-04-0
For decades, magnesium stearate has served as a multi-functional food additive in the food sector. It acts as an emulsifier, binding agent, thickener, anti-caking agent, lubricant, demolding agent and defoamer. It is commonly incorporated into dietary supplements, confectionery goods, chewing gum, herbal spices and baking raw materials.
In pharmaceutical manufacturing, magnesium stearate functions as a standard inert excipient for producing tablets, capsules and powder formulations. It effectively enhances production machinability and ensures stable and consistent product quality.
