Orthophosphoric acid, is produced industrially by two general routes – the thermal process and the wet process, which includes two sub-methods. The wet process dominates in the commercial sector.
O 1336 (OTTO) Orthophosphoric acid, 85% Cas 7664-38-2 - used for dipping, but phosphoric acid for rust removal is more often formulated as a gel. As a thick gel, it may be applied to sloping, vertical, or even overhead surfaces.