Sodium Stearyl Fumarate

• CAT Number: R062675
• CAS Number: 4070-80-8
• Molecular Formula: C₂₂H₃₉NaO₄
• Molecular Weight: 390.53
• Purity: ≥95%
• Synonyms: (2E)-2-Butenedioic Acid Monooctadecyl Ester Sodium Salt; (E)-2-Butenedioic Acid, Monooctadecyl Ester Sodium Salt; Fumaric Acid Monooctadecyl Ester Sodium Salt; Fumaric Acid Octadecyl Ester Sodium Salt; Lubripharm SSF; Pruv; Sodium Monostearyl Fumarat
• Storage: Store at RT
• IUPAC Name: sodium;(E)-4-octadecoxy-4-oxobut-2-enoate
• InChI: InChI=1S/C22H40O4.Na/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-20-26-22(25)19-18-21(23)24;/h18-19H,2-17,20H2,1H3,(H,23,24);/q;+1/p-1/b19-18+
• InChIKey: STFSJTPVIIDAQX-LTRPLHCISA-M
• SMILES: CCCCCCCCCCCCCCCCCCOC(=O)/C=C/C(=O)[O-].[Na+]

Sodium stearyl fumarate（Cat No.:R062675）is a white, waxy powder used primarily as a pharmaceutical excipient, functioning as a lubricant in tablet and capsule formulations. Unlike traditional lubricants like magnesium stearate, it offers improved tablet hardness and disintegration properties, making it ideal for direct compression processes. Its non-reactive nature minimizes compatibility issues with active pharmaceutical ingredients (APIs). Derived from stearyl alcohol and fumaric acid, sodium stearyl fumarate ensures consistent performance and enhances manufacturing efficiency. It is widely used in both immediate-release and modified-release oral dosage forms.