CAS 2892-51-5 appears in our catalog under these names: 3,4-Dihydroxy-3-cyclobutene-1,2-dione/ 98+%, 3,4-Dihydroxy-3-cyclobutene-1,2-dione, >95% (HPLC), 3,4–Dihydroxy–3–cyclobutene–1,2–dione, 3,4-Dihydroxy-3-cyclobutene-1,2-dione, 98+% , 3,4-Dihydroxy-3-cyclobutene-1,2-dione. Offered by: Chemat, TRC, GLPBio, Thermo Scientific (Alfa Aesar), Biosynth. Available pack sizes: 5g, 100mg, 500mg, 50mg, 1g, 100g, 25g, 0,1kg.