Product Name PONCEAU 4R C.I. NO. 16255 Synonyms ACID RED -18 C.I.NAME Food Red 7 chemical Trisodium2-hydroxy-1-(4-sulfonato-1- IS No. 2558:1994 name naphtylazo)-naphtalene_6,8-disulfonato CAS NO. 2611-82-7 EINECS NO 220-036-2 SR NO LIMITS 1 Total dye content percent by mass on dry basis (at 105_+1�°C for 2hrs.)MIN. 85 2 Loss of drying at 135�°C, Sodium Chloride and Sulphate percent by mass,MAX. 15 3 Water insoluble matter,percent by mass,MAX. 0.2 4 Combined ether extract,percent by mass,MAX. 0.2 5 Subsidiary dyes,percent by mass,MAX. 1 6 Dye intermediates,percent by mass.MAX. 0.5 7 Heavy metals as pb(mg/kg)MAX. 40 8 Arsenic,(mg/kg). MAX 3 9 lead,(mg/kg) MAX 2