1-amino-2-naphthol-4-sulfonic acid 11:51 AM Anonymous 1-amino-2-naphthol-4-sulfonic acid [ORG CHEM]H2NC10H5(OH)SO3H White or gray,needlelike crystals; soluble in hot sodiumbisulfite solutions; used in themanufactureof azo dyes. Email ThisBlogThis!Share to XShare to Facebook letter A / organic chemistry