CAS 123-08-0 appears in our catalog under these names: Bisoprolol Impurity 15（Bisoprolol EP Impurity S）, 4-Hydroxybenzaldehyde, 98% , Bisoprolol Fumarate EP Impurity S-13C6. Offered by: Hubei YoungXin, Thermo Scientific (Alfa Aesar), Chemat Brand. Available pack sizes: 10mg, 25mg, 50mg, 100mg, 200mg, 25g, 100g, 500g.