1-Naphthalenesulfonic acid, 4-[(4-hydroxy-1-naphthalenyl)azo]-, monosodium salt 6409-10-5 Acid Brown RN Acid Chrome Brown RG Acid Leather Brown RN C.I. 14625 C.I. Acid Brown 6 C.I. Acid Brown 6, monosodium salt Eriosin Brown RN Fast Brown R Fenazo Brown F Leather Brown NR NSC9606 Naphthalene Brown R Naphthylamine Brown Naphthylamine Brown F Tertracid Brown C