Grade: Ph Eur, BP, USP pH: 2.8 - 4.0 (H2O, 20°C) Solubility: (20°C) soluble Boiling Point: 93 - 96°C (1013 hPa) Explosion Limit: 7 - 73 %(V) (Formaldehyde) Density: 1.09 g/cm3 (20°C) Ignition Point: 300°C (Formaldehyde)