3d image of red 2g skeletal formula

red 2g ?128 food additive adjuvants ingredient agent ins number azo dye pigment paint colorant synthetic indicator stain azo diazo food bleaching haemoglobin cancer coatings inks paper crepe fine tissue staining histology masson's trichrome carcinogenic aniline carcinogen substance compound component synthesis reaction production building block molecule molecular formula skeletal structural structure 3d