The chemical being sponsored is corn steep liquor (CAS #66071-94-1). Corn steep liquor (CSL) is also known by several synonyms including corn steepwater, light steepwater, and heavy steepwater. CSL is a mixture consisting of the water soluble extracts of corn soaked (steeped) in water. In fact, approximately 50% of CSL is water, with the remainder composed entirely of natural nutritive "building blocks" such as crude proteins, amino acids, minerals, vitamins, reducing sugars, organic acids, enzymes and other elemental nutrients. While the actual percent composition varies slightly between member companies, Table 1 lists the average composition of the major constituents of CSL (White and Johnson 2003).
CSL is very low in fat and fiber, which makes it an excellent nutritive source for animal feed. Constituents of ash include magnesium, phosphorus, potassium, calcium, chlorine, sodium and sulfur. CSL is also a good source for all amino acids, important vitamins and nitrogen compounds, and essential trace elements such as iron, manganese, boron, copper, and zinc. All of these constituents provide natural nutrition for normal cell metabolism and are not a cause for concern.