501 is made of special polyether as the main component and other auxiliary agent, it’s a high concentration and high efficiency antifoaming agent. No silicon spot residue on the tank wall, easy to clean the equipment. This product has excellent antifoam performance, in addition to high stability and water dispersion performance. This product is specially designed for the cleaning of circuit board in developing, DE-film, water treatment and strong alkali water process, and can also be widely used in developing. The most characteristic of this product; In the cleaning solution does not demulsify, does not block the net, does not float, does not affect the subsequent processing and has a strong anti-bubble ability. This product becomes turbidible when diluted with water and transparent when diluted with methanol.