2-amino-4-nitrophenol Cas : 99-57-0 Characteristic specification Dry product wet product Appearance yellow to yellow brown powder yellow to yellow brown crystals Content (%) 98.0 80.0 Melting point ( ) 138.0 138.0 Insoluble matter in hci ( % ) 0.1 0.1 Packing ¦in 50 kgs net woven bag each lined with plastic bag.