lubripharm Sodium Stearyl Fumarate (SSF) is an inert, tablet lubricant for use in traditional and orally disintegrating tablets, effervescent formulas, or in formulas where the active is incompatible with magnesium stearate. Lubripharm Sodium Stearyl Fumarate (SSF) is a less hydrophobic alternative to magnesium stearate, providing better stability. CAS 4070-80-8