CAS 33308-41-7 appears in our catalog under these names: Phthalocyanine tetrasulfonic acid, 95%, Phthalocyanine Tetrasulfonic Acid, Phthalocyanine tetrasulfonic acid, Phthalocyanine tetrasulfonic acid, 95%, 95%, Tetrasulfophthalocyanine. Offered by: Combi-blocks, TRC, GLPBio, Biosynth, Chemat. Available pack sizes: 250mg, 1g, 100mg, 50mg, 10 mg, 5 mg.