CAS 25906-66-5 appears in our catalog under these names: 2,5–Dimercaptoterephthalic acid, 2,5-Dimercaptoterephthalic acid, 95%, 2,5-Dimercaptoterephthalic acid 98% HPLC. Offered by: GLPBio, Thermo Scientific (Acros), Ambeed, Fluorochem. Available pack sizes: 100mg, 1g, 250mg, 5g, 10g, 25g.