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Magnesium stearate is a compound of a variety of solid organic acids of magnesium, mainly composed of magnesium stearate and magnesium palmitate in variable proportions. Magnesium stearate is a widely used pharmaceutical excipient and is non-toxic when taken orally, but it can cause diarrhea or mucosal irritation when taken in large amounts. Magnesiumstearate (light) item index chemical formula MChemicalbookg[C17H35COO]2 appearance: white powder, no obvious mechanical impurities. Standard specification Q/CJYF.7-2001 magnesium content, %6.5~7.7 melting point, °C≥120 free fatty acids (based on stearic acid), %≤3.0 heating reduction, %≤3.0 fineness (through 0.075mm sieve), %≥99.0.