Spectrum Chemical manufactures and distributes fine chemicals with quality you can count on including those with CAS number 3734-67-6, Whether you call it Azophloxine, 5-(Acetylamino)-4-hydroxy-3-(phenylazo)-2 -7-naphthalenedisulfonic Acid Disodium Salt , Acid Bright Red or Acid Red 1 you can be assured the Azophloxine products offered by Spectrum, meet or exceed the grade requirements or specifications for each individual product.