Specification Product Name CALMAGITE Synonyms 3-Hydroxy-4-(2-hydroxy-5-methylphenylazo)-1- naphthalenesulfonic acid CAS NO. 3147-14-6 Molecular Formula C17H14N2O5S Formula Weight 358.37 Appearance Dark Brown powder Structure     Tests    Limits Solubility 0.1% (Dist. Water) - Clear Red Solution Absorption Max.(at pH 10.0 in Ammonia buffer + 2 drops of EDTA soln) - 600 - 610nm   Absopritivity (A1%/1cm at max, at pH 10.0 in Ammonia buffer+ 2 drops EDTA solution) On dried substance - > 300 Loss On Drying (110°C) 1 hr. - < 10%         REVISED: 1-1-2012