Sodium Stearyl Fumarate IP/BP/USP. Sodium stearyl fumarate is an inert, hydrophilic, tablet lubricant, useful in situations where other lubricating agents (i.e., magnesium stearate) fail to provide tablets of adequate stability, hardness, content uniformity, disintegration and dissolution rate.
Magnesium stearate is a fine white powder that sticks to your skin and is greasy to the touch. It's a simple salt made up of two substances, a saturated fat called stearic acid and the mineral magnesium. Stearic acid can also be found in many foods, such as: chicken. eggs.