Not Less Than - 95%
2-Hydroxy-5-Amino-N-(2-carboxy-4-aminophenyl)benzoic Acid; N-(2-carboxy-4-aminophenyl)-5-aminosalicylic Acid;5-Amino-2-((3-carboxy-4-hydroxyphenyl)amino)benzoic Acid; 2-Hydroxy-5-[(2-carboxy-4-aminophenyl)amino]benzoic Acid