S3131 SIGMA Sulindac sulfide ≥98% (HPLC), solid Synonym: (Z)-5-Fluoro-2-methyl-1-[p-(methylthio)benzylidene]indene-3-acetic acid CAS Number 32004-67-4 Empirical Formula (Hill Notation) C20H17FO2S Molecular Weight 340.41 assay ≥98% (HPLC) form solid color yellow solubility DMSO: ≥22 mg/mL