Sentence:  <WSD>Amaranth</WSD> is a red azo-dye with the chemical name trisodium 2-hydroxyl-1-(4-sulfonato-1-naphthylazo)naphthalene-3,6-disulfonate [...]. <WSD>Amaranth</WSD> appears to be relatively unstable in solution and in processed food. Biscuits containing <WSD>Amaranth</WSD> showed a loss of 39–45% promoted by the use of baking soda, sucrose, and dextrose. The degradation of <WSD>Amaranth</WSD> may lead to the presence of naphthenic acid equivalent to the loss of <WSD>Amaranth</WSD>. 
Meaning of the word marked with <WSD> tags:  A red to purple azo dye used as a biological stain, and in some countries in cosmetics and as a food colouring.