... disease 4. manufactured under GMP compliance Thymosin α1 (Thymosin alpha1, Tα1), originally separated and purified from Thymosin Fraction 5 (TF5), is an acidic ... acid composition: ±10% theoretical value5,Purity (by two HPLC methods): ≥98.0%6,Single impurity (by two HPLC methods): ≤1.0 ... %7,Total impurity (by two HPLC methods): ≤2%8,Peptide content ( ...