This product is a white or almost white powder; Almost odorless; Has hygroscopicity. This product is insoluble in water, ethanol, trichloromethane, or ether. This product has a high capillary/water content, a large specific surface area, extremely strong hydration ability (HK: 5.6), high and rapid water absorption (58.5%), strong water absorption and expansion ability, and a swelling coefficient of 2.25-2.30. It has the same chelating ability as polyvinylpyrrolidone and can chelate various substances, such as phenols and iodine.