Formula: HClO4 Formula weight: 100.46 CAS Number: 7601-90-3 UN Number: UN1802 Hazard Class: 8 Packing Group: II Harmonized Tariff Code:  2811.19 Hazard Statements: H272-H314 May intensify fire; oxidizer. Causes severe skin burns and eye damage. Precautionary Statements: …