Formula: (CH3O)3B Formula weight: 103.92 Purity: 99.99% (metals basis) CAS Number: 121-43-7 UN Number: UN2416 Hazard Class: 3 Packing Group: II Harmonized Tariff Code:  2920.90 Hazard Statements: H225-H312 Highly flammable liquid and vapour. Harmful in contact with skin. …