Pigment yellow 1 Synonyms: Pigment yellow 1; Hansa yellow g; Fast yellow g Molecular structure: Foreign relative brand: Azoyellow gx(rol) Adc pigment yellow g (adcl) 1104 yellow g(dcc) Aquaflex yellow g(ttc) Sf yellow g (sud) Product name Trade name: hansa yellow g C.I. Number: pigment yellow 1 Cas number: 2512-29-0 Eu number: 219-730-8 Chemical family: mono azo