Magnesium stearate. CAS NO.557-05-1

White powder, specific gravity 1.07, slightly soluble in water, soluble in hot ethanol, in strong acid decomposition

The goods used as PVC thermal stabilizer, and cosmetics in flour, oil of skin and the raw material of pharmaceutical tablet (cs) medicine, lubrication medicine);Used in the school wood powder of lubrication glossy transparent;Paint industry as transparent smoothing agent, etc.Used as PVC stabilizer of metal soap more cadmium, barium, calcium, zinc, magnesium, senior fatty acid salt, chengji is stearic acid is lauric acid salts.The performance of metal soap stabilizer and varies with the kinds of metal and acid radical, general rules are as follows: heat resistance: cadmium, zinc soap early heat;Barium, calcium, magnesium, strontium soap long-term heat and lead soap in the middle.Weather: cadmium, zinc, lead, barium, tin soap is better.Machining: lead, cadmium soap good lubricity, but acid radical lubricity also had an impact on.In terms of the same kind of metal, aliphatic is better than that of the aromatic, aliphatic acid radical in the molecular chain of the longer the lubricity.Barium, calcium, magnesium, strontium soap lubricity is poorer, but gelation can be good.Pressure analysis: barium, calcium, magnesium, strontium soap prone to pressure analysis phenomenon, and zinc, cadmium, lead, soap is not easy to appear pressure analysis, the longer the molecular chain fatty acid soap, separation, the more the pressure, spray frost are more.Have a big lead, cadmium toxicity of soap and sulfide pollution.Use in the non-toxic formula of calcium, zinc soap.In the formula of multi-purpose barium sulfide pollution resistance, zinc soap.Magnesium stearate as non-toxic, allow the United States, Germany and Japan base used in contact with food products, but is not widely used as PVC heat stabilizer.In China pharmacopoeia pharmacopoeia and some other countries are carrying the varieties, of magnesium content in the pharmacopoeia, moisture, heavy metal, iron, sulfate and chloride content of the stipulations.2. Used for powder products in the cosmetics, can enhance the adhesion, lubricity, raw material also can be used as pharmaceutical tablets.