Boric acid
Boric acid is quite often added to mixtures containing aluminium to act as a buffer to stop the alkali reaction accelerating. It is especially important to include boric acid when the composition contains barium nitrate or if it is being made up into a paste with water. Colour: White Odour: Odourless Solvent: Water Formula: H2BO3 Melting Point: 171�C Boiling Point: Decomposes at 300�C