Magnesium stearate

Product Name

Magnesium stearate, puriss., meets analytical specification of Ph. Eur., BP, ≥90% stearic and palmitic acid basis, ≥40% stearic acid basis (GC), 4.0-5.0% Mg basis (calc on dry sub.)

InChI key

HQKMJHAJHXVSDF-UHFFFAOYSA-L

InChI

1S/2C18H36O2.Mg/c2*1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18(19)20;/h2*2-17H2,1H3,(H,19,20);/q;;+2/p-2

SMILES string

CCCCCCCCCCCCCCCCCC(=O)O[Mg]OC(=O)CCCCCCCCCCCCCCCCC

grade

puriss.

assay

≥40% stearic acid basis (GC)
≥90% stearic and palmitic acid basis
4.0-5.0% Mg basis (calc on dry sub.)

quality

meets analytical specification of Ph. Eur., BP

impurities

acidity or alkalinity, complies
microbiological impurity, in accordance
residual solvents, complies

loss

≤6.0% loss on drying, 105 °C

mp

200 °C (lit.)

acid value

195‑210(fatty acid)

solubility

alcohol: insoluble
diethyl ether: insoluble
water: insoluble

anion traces

chloride (Cl^-): ≤1000 mg/kg
sulfate (SO₄^2-): ≤5000 mg/kg

cation traces

Cd: ≤3 mg/kg
Ni: ≤5 mg/kg
Pb: ≤10 mg/kg

suitability

in accordance for fatty acid composition
passes test for identity

application(s)

pharmaceutical (small molecule)