Zhangjiagang Huachang Pharmaceutical Co.,Ltd., is a medicine manufacturing enterprise specializing in the research, engages in the R&D, production, sales of the amino acid, amino acid derivative, other bulk drug and intermediate. We have passed GMP, ISO9001, ISO14001,OSHMS18001, etc. and are now carrying out the DMF, FDA, COS, etc .Our Main Productions: L-Methionine ,L-Tryptophan,L-Threonine ,L-Lysine Hydrochloride ,L-Valine,DL-Methionine ,DL-Threonine,DL-Valine,DL-Isoleucine,D-Alanine,D-ValineD-Threonine,D-Methionine,D-Tryptophan,D-Tryptophan,D-Leucine,D-Isoleucine,N-Acetyl-DL-Methionine,N-Acetyl-L-Methionine,N-Acetyl-L-Valine,N-Acetyl-L-Cysteine,N-Acetyl-DL-Tryptophan