Filtra Catalysts and Chemicals Ltd. Manufacture Cleaning Chemicals. Filtra Catalysts and Chemicals Ltd. Is an ISO 9001:2000 certified company. The Cleaning Chemicals are available in various types like Alkaline or Acidic or Surfactant based eco-friendly cleaning chemicals which are used for cleaning of all kinds of equipment surfaces like steels before coating, evaporator and condenser coils, degreasing and preparation of steel surfaces.