Formula: Yb Formula weight: 173.04 Purity: 99.9% (REO) CAS Number: 7440-64-4 UN Number: UN3208 Hazard Class: 4.3 Packing Group: II Harmonized Tariff Code:  2805.30 Hazard Statements: H261 In contact with water releases flammable gas. Precautionary Statements: …