Qingdao Unionchem Co., Ltd. is a manufacturer of sodium carboxymethyl starch located in Qingdao, China. The document provides specifications for sodium carboxymethyl starch including its appearance, pH, viscosity, degree of substitution, purity, moisture content, particle size, limits for heavy metals including lead, arsenic, mercury and cadmium, and microbiological limits. It notes the product is packaged in 20kg or 25kg multiply paper bags and has a 24-month shelf life when stored sealed in a cool, dry, and clean area.