4-Amino-3-hydroxybenzoic acid

4-Amino-3-hydroxybenzoic acid (CAS 2374-03-0) is a Tafamidis intermediate — Tafamidis being a treatment for transthyretin-related hereditary amyloidosis (familial amyloid polyneuropathy) — manufactured to pharmaceutical grade by Hunan HuaTeng Pharmaceutical Co., Ltd. The compound is also used as a monomer in lyotropic polybenzoxazole polymer production and in thermal recording materials and hair dyes; it is distributed across North America, Central/South America, Western and Eastern Europe, Asia.