Brewing. Sorghum red is a brick red amorphous powder, liquid, paste or lumps, slightly special odor, sorghum red soluble in water and ethanol, insoluble in oils and fats, commonly used in winemaking. Food additives sorghum red (GB 9993-2005) by the People's Republic of China *** and the State General Administration of Quality Supervision, Inspection and Quarantine, China's National Standardization Administration issued.