Specification Product Name AMARANTH Synonyms Acid Red 27; Acetacid Red 2BR; Acilan Red SE; Azo Red R; Azo Rubine SF; Bordeaux S; 3-Hydroxy-4-((4-sulfo-1- naphthalenyl)azo)-2,7-naphthalenedisulfonic acid trisodium salt C.I. NO. 16185 CAS NO. 915–67-3 Molecular Formula C20H11N2Na3O10S3 Formula Weight 604.47 Appearance Reddish – Brown Powder Or Granules Structure     Tests    Limits Water-insoluble matter - 0.20% maximum Solubility (10 mg/ml in H2O) - Clear dark red to red-brown solution Lead (mg/kg) - 10.0 maximum Heavy metals (as Pb) (mg/kg) - 40.0 maximum         REVISED: 1-1-2012