CAS 35218-75-8 appears in our catalog under these names: TPPS, TPPS (=Tetraphenylporphyrin Tetrasulfonic Acid) [Ultra-high sensitive spectrophotometric reagent for transition metals], >85.0%(HPLC), TPPS 85%, (PORPHINE-5,10,15,20-TETRAYL)TETRAKIS(BE, 4,4′,4″,4″′-(Porphine-5,10,15,20-tetrayl)tetrakis(benzenesulfonic acid), 85%, 85%. Offered by: TRC, GLPBio, TCI, Ambeed, Sigma-Aldrich. Available pack sizes: 500mg, 100mg, 1g, 50mg, 250mg, 5g, 10mM/1mL, 100 mg.