CAS 37199-66-9 appears in our catalog under these names: Potassium (poly)sulfide,≥42% K2S basis, Potassium polysulfide, pure, POTASSIUM POLYSULFIDE, Potassium (poly)sulfide, Potassium polysulfide, 42%+,RG, 42%+,RG. Offered by: GLPBio, Thermo Scientific (Acros), Sigma-Aldrich, Chemat. Available pack sizes: 100g, 500g, 1KG, 2.5KG, 250g, 20KG, 6X1KG, 5g.