CAS 123-91-1 appears in our catalog under these names: 1,4 dioksan czda, 1,4-Dioxane, 1,4-Dioxane 1000 µg/mL in Acetonitrile, 1,4-Dioxane 1000 µg/mL in Methanol, 1,4-Dioxane, ACS, 99+%, stab. with 1-3ppm BHT . Offered by: Chempur, Hubei YoungXin, TRC, Dr. Ehrenstorfer, Thermo Scientific (Alfa Aesar). Available pack sizes: 2,5l, 10mg, 25mg, 50mg, 100mg, 200mg, 100g, 1g.