Formula: NH4BF4 Formula weight: 104.84 Purity: 99.999% (metals basis) CAS Number: 13826-83-0 Harmonized Tariff Code:  2826.90 Hazard Statements: H301-H315-H319-H335 Toxic if swallowed. Causes skin irritation. Causes serious eye irritation. May cause respiratory irritation. …