... used as ceiling board and wall partition magnesium oxide board,made in ChinaProduct Description:Magnesium Oxide Board (MGO board) is the ... installUsage:Used primarily as fireproof materials for walls and ceilings in office buildings, apartment complexes, residential constructions, hotels, restaurants, railway ... (%)≤5048.711formaldehyde emission (mg/L)------<0.1 magnesium oxide board,made in China